/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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 15:24:23,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 15:24:23,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 15:24:23,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 15:24:24,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 15:24:24,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 15:24:24,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 15:24:24,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 15:24:24,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 15:24:24,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 15:24:24,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 15:24:24,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 15:24:24,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 15:24:24,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 15:24:24,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 15:24:24,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 15:24:24,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 15:24:24,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 15:24:24,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 15:24:24,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 15:24:24,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 15:24:24,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 15:24:24,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 15:24:24,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 15:24:24,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 15:24:24,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 15:24:24,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 15:24:24,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 15:24:24,053 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-VariableLbe.epf [2021-03-24 15:24:24,086 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 15:24:24,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 15:24:24,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 15:24:24,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 15:24:24,090 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 15:24:24,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 15:24:24,090 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 15:24:24,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 15:24:24,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 15:24:24,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 15:24:24,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 15:24:24,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 15:24:24,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 15:24:24,092 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 15:24:24,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 15:24:24,092 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 15:24:24,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 15:24:24,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 15:24:24,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 15:24:24,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 15:24:24,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 15:24:24,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 15:24:24,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 15:24:24,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 15:24:24,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 15:24:24,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 15:24:24,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 15:24:24,095 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 15:24:24,095 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 15:24:24,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 15:24:24,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 15:24:24,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 15:24:24,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 15:24:24,431 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 15:24:24,432 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 15:24:24,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-2.wvr.bpl [2021-03-24 15:24:24,433 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-2.wvr.bpl' [2021-03-24 15:24:24,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 15:24:24,490 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 15:24:24,491 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 15:24:24,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 15:24:24,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 15:24:24,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:24" (1/1) ... [2021-03-24 15:24:24,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:24" (1/1) ... [2021-03-24 15:24:24,514 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 15:24:24,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 15:24:24,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 15:24:24,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 15:24:24,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:24" (1/1) ... [2021-03-24 15:24:24,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:24" (1/1) ... [2021-03-24 15:24:24,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:24" (1/1) ... [2021-03-24 15:24:24,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:24" (1/1) ... [2021-03-24 15:24:24,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:24" (1/1) ... [2021-03-24 15:24:24,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:24" (1/1) ... [2021-03-24 15:24:24,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:24" (1/1) ... [2021-03-24 15:24:24,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 15:24:24,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 15:24:24,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 15:24:24,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 15:24:24,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 15:24:24,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 15:24:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 15:24:24,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 15:24:24,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 15:24:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 15:24:24,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 15:24:24,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 15:24:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 15:24:24,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 15:24:24,594 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 15:24:24,730 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 15:24:24,730 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 15:24:24,732 INFO L202 PluginConnector]: Adding new model ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 03:24:24 BoogieIcfgContainer [2021-03-24 15:24:24,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 15:24:24,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 15:24:24,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 15:24:24,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 15:24:24,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:24" (1/2) ... [2021-03-24 15:24:24,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632a302a and model type ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 03:24:24, skipping insertion in model container [2021-03-24 15:24:24,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 03:24:24" (2/2) ... [2021-03-24 15:24:24,737 INFO L111 eAbstractionObserver]: Analyzing ICFG ticket-2.wvr.bpl [2021-03-24 15:24:24,742 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 15:24:24,745 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 15:24:24,745 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 15:24:24,767 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-24 15:24:24,782 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-24 15:24:24,800 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 15:24:24,800 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 15:24:24,800 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 15:24:24,801 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 15:24:24,801 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 15:24:24,801 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 15:24:24,801 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 15:24:24,801 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 15:24:24,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 22 transitions, 60 flow [2021-03-24 15:24:24,836 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-03-24 15:24:24,840 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 15:24:24,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 0/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 15:24:24,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 22 transitions, 60 flow [2021-03-24 15:24:24,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 18 transitions, 48 flow [2021-03-24 15:24:24,847 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 15:24:24,857 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 25 places, 18 transitions, 48 flow [2021-03-24 15:24:24,863 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 25 places, 18 transitions, 48 flow [2021-03-24 15:24:24,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 25 places, 18 transitions, 48 flow [2021-03-24 15:24:24,878 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-03-24 15:24:24,878 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 15:24:24,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 0/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 15:24:24,880 INFO L142 LiptonReduction]: Number of co-enabled transitions 82 [2021-03-24 15:24:24,950 INFO L154 LiptonReduction]: Checked pairs total: 180 [2021-03-24 15:24:24,951 INFO L156 LiptonReduction]: Total number of compositions: 3 [2021-03-24 15:24:24,952 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 106 [2021-03-24 15:24:24,974 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-24 15:24:24,974 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 15:24:24,975 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:24,975 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:24,975 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:24,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:24,982 INFO L82 PathProgramCache]: Analyzing trace with hash 321644400, now seen corresponding path program 1 times [2021-03-24 15:24:25,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:25,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081946892] [2021-03-24 15:24:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:25,183 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 15:24:25,184 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 15:24:25,195 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:25,195 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:25,202 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:25,202 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-03-24 15:24:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:25,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081946892] [2021-03-24 15:24:25,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:25,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 15:24:25,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411031683] [2021-03-24 15:24:25,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 15:24:25,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:25,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 15:24:25,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-24 15:24:25,228 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 25 [2021-03-24 15:24:25,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2021-03-24 15:24:25,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:25,229 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 25 [2021-03-24 15:24:25,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:25,262 INFO L129 PetriNetUnfolder]: 5/36 cut-off events. [2021-03-24 15:24:25,262 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 15:24:25,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 36 events. 5/36 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 76 event pairs, 2 based on Foata normal form. 1/37 useless extension candidates. Maximal degree in co-relation 50. Up to 12 conditions per place. [2021-03-24 15:24:25,264 INFO L132 encePairwiseOnDemand]: 18/25 looper letters, 5 selfloop transitions, 5 changer transitions 2/20 dead transitions. [2021-03-24 15:24:25,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 20 transitions, 76 flow [2021-03-24 15:24:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 15:24:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 15:24:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2021-03-24 15:24:25,273 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.744 [2021-03-24 15:24:25,273 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 93 transitions. [2021-03-24 15:24:25,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 93 transitions. [2021-03-24 15:24:25,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:25,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 93 transitions. [2021-03-24 15:24:25,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:25,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:25,281 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:25,283 INFO L185 Difference]: Start difference. First operand has 22 places, 15 transitions, 42 flow. Second operand 5 states and 93 transitions. [2021-03-24 15:24:25,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 20 transitions, 76 flow [2021-03-24 15:24:25,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 20 transitions, 68 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-24 15:24:25,287 INFO L241 Difference]: Finished difference. Result has 25 places, 17 transitions, 64 flow [2021-03-24 15:24:25,288 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2021-03-24 15:24:25,289 INFO L343 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2021-03-24 15:24:25,289 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 64 flow [2021-03-24 15:24:25,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2021-03-24 15:24:25,289 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:25,289 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:25,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 15:24:25,290 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:25,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:25,290 INFO L82 PathProgramCache]: Analyzing trace with hash 173870782, now seen corresponding path program 2 times [2021-03-24 15:24:25,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:25,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088016512] [2021-03-24 15:24:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:25,311 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:25,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:25,314 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:25,315 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:25,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:25,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:25,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:25,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:24:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:25,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088016512] [2021-03-24 15:24:25,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:25,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 15:24:25,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419696715] [2021-03-24 15:24:25,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 15:24:25,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:25,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 15:24:25,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 15:24:25,329 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 25 [2021-03-24 15:24:25,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:25,329 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:25,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 25 [2021-03-24 15:24:25,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:25,365 INFO L129 PetriNetUnfolder]: 4/29 cut-off events. [2021-03-24 15:24:25,365 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-03-24 15:24:25,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 29 events. 4/29 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 36 event pairs, 2 based on Foata normal form. 2/31 useless extension candidates. Maximal degree in co-relation 56. Up to 10 conditions per place. [2021-03-24 15:24:25,366 INFO L132 encePairwiseOnDemand]: 19/25 looper letters, 5 selfloop transitions, 4 changer transitions 3/20 dead transitions. [2021-03-24 15:24:25,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 20 transitions, 94 flow [2021-03-24 15:24:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 15:24:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 15:24:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2021-03-24 15:24:25,368 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.704 [2021-03-24 15:24:25,368 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 88 transitions. [2021-03-24 15:24:25,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 88 transitions. [2021-03-24 15:24:25,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:25,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 88 transitions. [2021-03-24 15:24:25,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:25,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:25,370 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:25,370 INFO L185 Difference]: Start difference. First operand has 25 places, 17 transitions, 64 flow. Second operand 5 states and 88 transitions. [2021-03-24 15:24:25,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 20 transitions, 94 flow [2021-03-24 15:24:25,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 20 transitions, 82 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-03-24 15:24:25,372 INFO L241 Difference]: Finished difference. Result has 27 places, 17 transitions, 65 flow [2021-03-24 15:24:25,372 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=65, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2021-03-24 15:24:25,373 INFO L343 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2021-03-24 15:24:25,373 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 65 flow [2021-03-24 15:24:25,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:25,373 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:25,373 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:25,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 15:24:25,374 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:25,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:25,374 INFO L82 PathProgramCache]: Analyzing trace with hash -588566246, now seen corresponding path program 3 times [2021-03-24 15:24:25,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:25,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466921196] [2021-03-24 15:24:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:25,408 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:25,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:25,411 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:25,411 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:25,418 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:25,418 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:25,438 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:25,439 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:24:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:25,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466921196] [2021-03-24 15:24:25,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:25,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 15:24:25,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770833089] [2021-03-24 15:24:25,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 15:24:25,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:25,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 15:24:25,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 15:24:25,441 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 25 [2021-03-24 15:24:25,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:25,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:25,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 25 [2021-03-24 15:24:25,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:25,465 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2021-03-24 15:24:25,465 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-03-24 15:24:25,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 8 events. 1/8 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 2/10 useless extension candidates. Maximal degree in co-relation 23. Up to 4 conditions per place. [2021-03-24 15:24:25,465 INFO L132 encePairwiseOnDemand]: 21/25 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2021-03-24 15:24:25,465 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 7 transitions, 40 flow [2021-03-24 15:24:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 15:24:25,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 15:24:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2021-03-24 15:24:25,469 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.648 [2021-03-24 15:24:25,469 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 81 transitions. [2021-03-24 15:24:25,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 81 transitions. [2021-03-24 15:24:25,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:25,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 81 transitions. [2021-03-24 15:24:25,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:25,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:25,474 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:25,474 INFO L185 Difference]: Start difference. First operand has 27 places, 17 transitions, 65 flow. Second operand 5 states and 81 transitions. [2021-03-24 15:24:25,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 7 transitions, 40 flow [2021-03-24 15:24:25,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 7 transitions, 30 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-03-24 15:24:25,475 INFO L241 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2021-03-24 15:24:25,476 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2021-03-24 15:24:25,476 INFO L343 CegarLoopForPetriNet]: 22 programPoint places, -7 predicate places. [2021-03-24 15:24:25,476 INFO L480 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2021-03-24 15:24:25,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:25,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 15:24:25,481 INFO L202 PluginConnector]: Adding new model ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 03:24:25 BasicIcfg [2021-03-24 15:24:25,481 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 15:24:25,482 INFO L168 Benchmark]: Toolchain (without parser) took 991.22 ms. Allocated memory was 255.9 MB in the beginning and 369.1 MB in the end (delta: 113.2 MB). Free memory was 236.3 MB in the beginning and 348.2 MB in the end (delta: -111.9 MB). Peak memory consumption was 2.0 MB. Max. memory is 16.0 GB. [2021-03-24 15:24:25,483 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 15:24:25,484 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.59 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 15:24:25,484 INFO L168 Benchmark]: Boogie Preprocessor took 12.40 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.9 MB in the end (delta: 868.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 15:24:25,488 INFO L168 Benchmark]: RCFGBuilder took 203.23 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 239.0 MB in the end (delta: -5.1 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.0 GB. [2021-03-24 15:24:25,489 INFO L168 Benchmark]: TraceAbstraction took 747.87 ms. Allocated memory was 255.9 MB in the beginning and 369.1 MB in the end (delta: 113.2 MB). Free memory was 238.5 MB in the beginning and 348.2 MB in the end (delta: -109.7 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.0 GB. [2021-03-24 15:24:25,492 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 0.14 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.59 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.40 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.9 MB in the end (delta: 868.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 203.23 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 239.0 MB in the end (delta: -5.1 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 747.87 ms. Allocated memory was 255.9 MB in the beginning and 369.1 MB in the end (delta: 113.2 MB). Free memory was 238.5 MB in the beginning and 348.2 MB in the end (delta: -109.7 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 87.7ms, 25 PlacesBefore, 22 PlacesAfterwards, 18 TransitionsBefore, 15 TransitionsAfterwards, 82 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 180 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 91, positive: 63, positive conditional: 0, positive unconditional: 63, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 40, positive: 31, positive conditional: 0, positive unconditional: 31, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 40, positive: 31, positive conditional: 0, positive unconditional: 31, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 91, positive: 32, positive conditional: 0, positive unconditional: 32, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 40, unknown conditional: 0, unknown unconditional: 40] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6 - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 681.5ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 146.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 168.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6 SDtfs, 6 SDslu, 2 SDs, 0 SdLazy, 56 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=2, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.5ms SsaConstructionTime, 34.8ms SatisfiabilityAnalysisTime, 179.0ms InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 129 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...