/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-RepeatedVariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 08:03:40,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 08:03:40,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 08:03:41,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-25 08:03:41,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-25 08:03:41,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-25 08:03:41,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-25 08:03:41,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-25 08:03:41,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-25 08:03:41,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-25 08:03:41,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-25 08:03:41,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-25 08:03:41,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-25 08:03:41,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-25 08:03:41,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-25 08:03:41,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-25 08:03:41,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-25 08:03:41,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-25 08:03:41,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-25 08:03:41,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-25 08:03:41,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-25 08:03:41,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-25 08:03:41,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-25 08:03:41,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-25 08:03:41,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-25 08:03:41,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-25 08:03:41,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-25 08:03:41,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-25 08:03:41,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-25 08:03:41,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-25 08:03:41,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-25 08:03:41,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-25 08:03:41,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-25 08:03:41,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-25 08:03:41,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-25 08:03:41,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-25 08:03:41,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-25 08:03:41,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-25 08:03:41,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-25 08:03:41,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-25 08:03:41,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-25 08:03:41,047 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-RepeatedVariableLbe.epf [2021-03-25 08:03:41,073 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 08:03:41,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 08:03:41,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 08:03:41,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 08:03:41,077 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 08:03:41,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 08:03:41,078 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 08:03:41,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 08:03:41,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 08:03:41,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 08:03:41,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 08:03:41,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 08:03:41,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 08:03:41,079 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 08:03:41,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 08:03:41,079 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 08:03:41,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 08:03:41,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 08:03:41,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 08:03:41,081 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 08:03:41,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 08:03:41,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 08:03:41,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 08:03:41,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 08:03:41,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 08:03:41,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 08:03:41,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 08:03:41,085 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-25 08:03:41,085 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 08:03:41,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 08:03:41,085 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 08:03:41,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 08:03:41,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 08:03:41,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 08:03:41,382 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 08:03:41,382 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 08:03:41,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl [2021-03-25 08:03:41,383 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl' [2021-03-25 08:03:41,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 08:03:41,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 08:03:41,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 08:03:41,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 08:03:41,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 08:03:41,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:03:41" (1/1) ... [2021-03-25 08:03:41,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:03:41" (1/1) ... [2021-03-25 08:03:41,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 08:03:41,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 08:03:41,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 08:03:41,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 08:03:41,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:03:41" (1/1) ... [2021-03-25 08:03:41,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:03:41" (1/1) ... [2021-03-25 08:03:41,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:03:41" (1/1) ... [2021-03-25 08:03:41,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:03:41" (1/1) ... [2021-03-25 08:03:41,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:03:41" (1/1) ... [2021-03-25 08:03:41,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:03:41" (1/1) ... [2021-03-25 08:03:41,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:03:41" (1/1) ... [2021-03-25 08:03:41,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 08:03:41,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 08:03:41,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 08:03:41,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 08:03:41,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:03:41" (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 [2021-03-25 08:03:41,488 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-03-25 08:03:41,488 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-03-25 08:03:41,489 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-03-25 08:03:41,489 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2021-03-25 08:03:41,489 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2021-03-25 08:03:41,489 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2021-03-25 08:03:41,489 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-03-25 08:03:41,489 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-03-25 08:03:41,489 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-03-25 08:03:41,489 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-25 08:03:41,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 08:03:41,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 08:03:41,490 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 08:03:41,571 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 08:03:41,571 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-25 08:03:41,572 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 08:03:41 BoogieIcfgContainer [2021-03-25 08:03:41,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 08:03:41,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 08:03:41,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 08:03:41,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 08:03:41,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:03:41" (1/2) ... [2021-03-25 08:03:41,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1544bcc3 and model type example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 08:03:41, skipping insertion in model container [2021-03-25 08:03:41,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 08:03:41" (2/2) ... [2021-03-25 08:03:41,577 INFO L111 eAbstractionObserver]: Analyzing ICFG example_3.bpl [2021-03-25 08:03:41,580 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 08:03:41,582 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-25 08:03:41,583 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 08:03:41,607 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-03-25 08:03:41,618 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-25 08:03:41,631 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 08:03:41,632 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 08:03:41,632 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 08:03:41,632 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 08:03:41,632 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 08:03:41,632 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 08:03:41,632 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 08:03:41,632 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 08:03:41,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 90 flow [2021-03-25 08:03:41,653 INFO L129 PetriNetUnfolder]: 5/24 cut-off events. [2021-03-25 08:03:41,653 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-03-25 08:03:41,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 24 events. 5/24 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2021-03-25 08:03:41,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 90 flow [2021-03-25 08:03:41,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 19 transitions, 74 flow [2021-03-25 08:03:41,658 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 08:03:41,677 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 23 places, 19 transitions, 74 flow [2021-03-25 08:03:41,680 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 23 places, 19 transitions, 74 flow [2021-03-25 08:03:41,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 23 places, 19 transitions, 74 flow [2021-03-25 08:03:41,685 INFO L129 PetriNetUnfolder]: 5/22 cut-off events. [2021-03-25 08:03:41,685 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-03-25 08:03:41,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 22 events. 5/22 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2021-03-25 08:03:41,687 INFO L142 LiptonReduction]: Number of co-enabled transitions 84 [2021-03-25 08:03:41,712 INFO L154 LiptonReduction]: Checked pairs total: 27 [2021-03-25 08:03:41,712 INFO L156 LiptonReduction]: Total number of compositions: 3 [2021-03-25 08:03:41,713 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 56 [2021-03-25 08:03:41,719 INFO L129 PetriNetUnfolder]: 5/18 cut-off events. [2021-03-25 08:03:41,720 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-03-25 08:03:41,720 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 08:03:41,720 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 08:03:41,720 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 08:03:41,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 08:03:41,724 INFO L82 PathProgramCache]: Analyzing trace with hash 33487082, now seen corresponding path program 1 times [2021-03-25 08:03:41,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 08:03:41,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322211246] [2021-03-25 08:03:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 08:03:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 08:03:41,794 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:41,794 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 08:03:41,802 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:41,803 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 08:03:41,807 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:41,808 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 08:03:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 08:03:41,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322211246] [2021-03-25 08:03:41,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 08:03:41,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 08:03:41,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585029554] [2021-03-25 08:03:41,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-25 08:03:41,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 08:03:41,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-25 08:03:41,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-25 08:03:41,824 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 27 [2021-03-25 08:03:41,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-03-25 08:03:41,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 08:03:41,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 27 [2021-03-25 08:03:41,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 08:03:41,834 INFO L129 PetriNetUnfolder]: 1/12 cut-off events. [2021-03-25 08:03:41,835 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-03-25 08:03:41,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 12 events. 1/12 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 3/15 useless extension candidates. Maximal degree in co-relation 11. Up to 3 conditions per place. [2021-03-25 08:03:41,835 INFO L132 encePairwiseOnDemand]: 24/27 looper letters, 1 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2021-03-25 08:03:41,836 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 12 transitions, 52 flow [2021-03-25 08:03:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-25 08:03:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-25 08:03:41,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2021-03-25 08:03:41,842 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9012345679012346 [2021-03-25 08:03:41,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 73 transitions. [2021-03-25 08:03:41,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 73 transitions. [2021-03-25 08:03:41,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 08:03:41,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 73 transitions. [2021-03-25 08:03:41,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-03-25 08:03:41,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 08:03:41,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 08:03:41,849 INFO L185 Difference]: Start difference. First operand has 20 places, 16 transitions, 68 flow. Second operand 3 states and 73 transitions. [2021-03-25 08:03:41,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 12 transitions, 52 flow [2021-03-25 08:03:41,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 12 transitions, 36 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-25 08:03:41,852 INFO L241 Difference]: Finished difference. Result has 16 places, 12 transitions, 34 flow [2021-03-25 08:03:41,853 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=34, PETRI_PLACES=16, PETRI_TRANSITIONS=12} [2021-03-25 08:03:41,854 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, -4 predicate places. [2021-03-25 08:03:41,854 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 08:03:41,854 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 16 places, 12 transitions, 34 flow [2021-03-25 08:03:41,854 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 16 places, 12 transitions, 34 flow [2021-03-25 08:03:41,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 12 transitions, 34 flow [2021-03-25 08:03:41,857 INFO L129 PetriNetUnfolder]: 1/12 cut-off events. [2021-03-25 08:03:41,857 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 08:03:41,857 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18 conditions, 12 events. 1/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 9. Up to 2 conditions per place. [2021-03-25 08:03:41,857 INFO L142 LiptonReduction]: Number of co-enabled transitions 24 [2021-03-25 08:03:41,858 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 08:03:41,858 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 08:03:41,858 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4 [2021-03-25 08:03:41,859 INFO L480 AbstractCegarLoop]: Abstraction has has 16 places, 12 transitions, 34 flow [2021-03-25 08:03:41,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-03-25 08:03:41,859 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 08:03:41,859 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 08:03:41,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 08:03:41,859 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 08:03:41,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 08:03:41,860 INFO L82 PathProgramCache]: Analyzing trace with hash 33659132, now seen corresponding path program 1 times [2021-03-25 08:03:41,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 08:03:41,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408939137] [2021-03-25 08:03:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 08:03:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 08:03:41,885 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:41,886 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 08:03:41,890 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:41,890 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 08:03:41,896 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:41,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-25 08:03:41,919 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-03-25 08:03:41,922 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 08:03:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 08:03:41,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408939137] [2021-03-25 08:03:41,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 08:03:41,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 08:03:41,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387944072] [2021-03-25 08:03:41,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 08:03:41,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 08:03:41,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 08:03:41,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-25 08:03:41,940 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2021-03-25 08:03:41,940 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 12 transitions, 34 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-03-25 08:03:41,940 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 08:03:41,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2021-03-25 08:03:41,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 08:03:41,977 INFO L129 PetriNetUnfolder]: 6/33 cut-off events. [2021-03-25 08:03:41,977 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 08:03:41,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 33 events. 6/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 87 event pairs, 1 based on Foata normal form. 1/32 useless extension candidates. Maximal degree in co-relation 45. Up to 7 conditions per place. [2021-03-25 08:03:41,978 INFO L132 encePairwiseOnDemand]: 23/27 looper letters, 5 selfloop transitions, 2 changer transitions 1/16 dead transitions. [2021-03-25 08:03:41,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 16 transitions, 58 flow [2021-03-25 08:03:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 08:03:41,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 08:03:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2021-03-25 08:03:41,979 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2021-03-25 08:03:41,979 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2021-03-25 08:03:41,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2021-03-25 08:03:41,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 08:03:41,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2021-03-25 08:03:41,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2021-03-25 08:03:41,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2021-03-25 08:03:41,981 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2021-03-25 08:03:41,982 INFO L185 Difference]: Start difference. First operand has 16 places, 12 transitions, 34 flow. Second operand 5 states and 104 transitions. [2021-03-25 08:03:41,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 16 transitions, 58 flow [2021-03-25 08:03:41,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 16 transitions, 57 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-25 08:03:41,983 INFO L241 Difference]: Finished difference. Result has 22 places, 13 transitions, 48 flow [2021-03-25 08:03:41,983 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=48, PETRI_PLACES=22, PETRI_TRANSITIONS=13} [2021-03-25 08:03:41,983 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2021-03-25 08:03:41,983 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 08:03:41,984 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 22 places, 13 transitions, 48 flow [2021-03-25 08:03:41,984 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 22 places, 13 transitions, 48 flow [2021-03-25 08:03:41,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 13 transitions, 48 flow [2021-03-25 08:03:41,987 INFO L129 PetriNetUnfolder]: 2/21 cut-off events. [2021-03-25 08:03:41,988 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 08:03:41,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 21 events. 2/21 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 37 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 31. Up to 4 conditions per place. [2021-03-25 08:03:41,988 INFO L142 LiptonReduction]: Number of co-enabled transitions 24 [2021-03-25 08:03:41,989 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 08:03:41,989 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 08:03:41,989 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 6 [2021-03-25 08:03:41,990 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 13 transitions, 48 flow [2021-03-25 08:03:41,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-03-25 08:03:41,990 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 08:03:41,990 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 08:03:41,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 08:03:41,990 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 08:03:41,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 08:03:41,991 INFO L82 PathProgramCache]: Analyzing trace with hash 53113680, now seen corresponding path program 2 times [2021-03-25 08:03:41,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 08:03:41,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966025809] [2021-03-25 08:03:41,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 08:03:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 08:03:42,012 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:42,013 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 08:03:42,013 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:42,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 08:03:42,020 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-25 08:03:42,020 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-25 08:03:42,030 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-03-25 08:03:42,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 08:03:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 08:03:42,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966025809] [2021-03-25 08:03:42,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 08:03:42,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 08:03:42,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086639074] [2021-03-25 08:03:42,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 08:03:42,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 08:03:42,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 08:03:42,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-25 08:03:42,042 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2021-03-25 08:03:42,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 13 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-03-25 08:03:42,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 08:03:42,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2021-03-25 08:03:42,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 08:03:42,066 INFO L129 PetriNetUnfolder]: 5/33 cut-off events. [2021-03-25 08:03:42,066 INFO L130 PetriNetUnfolder]: For 24/27 co-relation queries the response was YES. [2021-03-25 08:03:42,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 33 events. 5/33 cut-off events. For 24/27 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 99 event pairs, 0 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 63. Up to 7 conditions per place. [2021-03-25 08:03:42,066 INFO L132 encePairwiseOnDemand]: 23/27 looper letters, 5 selfloop transitions, 2 changer transitions 3/18 dead transitions. [2021-03-25 08:03:42,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 18 transitions, 92 flow [2021-03-25 08:03:42,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 08:03:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 08:03:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2021-03-25 08:03:42,068 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2021-03-25 08:03:42,068 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2021-03-25 08:03:42,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2021-03-25 08:03:42,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 08:03:42,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2021-03-25 08:03:42,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2021-03-25 08:03:42,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2021-03-25 08:03:42,070 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2021-03-25 08:03:42,070 INFO L185 Difference]: Start difference. First operand has 21 places, 13 transitions, 48 flow. Second operand 5 states and 104 transitions. [2021-03-25 08:03:42,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 18 transitions, 92 flow [2021-03-25 08:03:42,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 18 transitions, 85 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-25 08:03:42,071 INFO L241 Difference]: Finished difference. Result has 26 places, 13 transitions, 58 flow [2021-03-25 08:03:42,071 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=58, PETRI_PLACES=26, PETRI_TRANSITIONS=13} [2021-03-25 08:03:42,071 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2021-03-25 08:03:42,071 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 08:03:42,071 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 26 places, 13 transitions, 58 flow [2021-03-25 08:03:42,072 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 26 places, 13 transitions, 58 flow [2021-03-25 08:03:42,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 25 places, 13 transitions, 58 flow [2021-03-25 08:03:42,075 INFO L129 PetriNetUnfolder]: 2/21 cut-off events. [2021-03-25 08:03:42,075 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2021-03-25 08:03:42,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 21 events. 2/21 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 45 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 37. Up to 4 conditions per place. [2021-03-25 08:03:42,075 INFO L142 LiptonReduction]: Number of co-enabled transitions 20 [2021-03-25 08:03:42,076 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 08:03:42,076 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 08:03:42,076 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 5 [2021-03-25 08:03:42,076 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 13 transitions, 58 flow [2021-03-25 08:03:42,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-03-25 08:03:42,077 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 08:03:42,077 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 08:03:42,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-25 08:03:42,077 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 08:03:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 08:03:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash -802192974, now seen corresponding path program 3 times [2021-03-25 08:03:42,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 08:03:42,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995180076] [2021-03-25 08:03:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 08:03:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 08:03:42,108 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:42,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 08:03:42,109 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:42,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 08:03:42,120 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-25 08:03:42,121 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-25 08:03:42,136 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-03-25 08:03:42,137 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 08:03:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 08:03:42,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995180076] [2021-03-25 08:03:42,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 08:03:42,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 08:03:42,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777477235] [2021-03-25 08:03:42,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 08:03:42,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 08:03:42,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 08:03:42,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-25 08:03:42,157 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2021-03-25 08:03:42,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 13 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-03-25 08:03:42,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 08:03:42,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2021-03-25 08:03:42,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 08:03:42,193 INFO L129 PetriNetUnfolder]: 4/30 cut-off events. [2021-03-25 08:03:42,193 INFO L130 PetriNetUnfolder]: For 42/45 co-relation queries the response was YES. [2021-03-25 08:03:42,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 30 events. 4/30 cut-off events. For 42/45 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 82 event pairs, 1 based on Foata normal form. 1/30 useless extension candidates. Maximal degree in co-relation 64. Up to 6 conditions per place. [2021-03-25 08:03:42,194 INFO L132 encePairwiseOnDemand]: 23/27 looper letters, 5 selfloop transitions, 3 changer transitions 1/17 dead transitions. [2021-03-25 08:03:42,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 17 transitions, 99 flow [2021-03-25 08:03:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 08:03:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 08:03:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2021-03-25 08:03:42,197 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2021-03-25 08:03:42,197 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2021-03-25 08:03:42,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2021-03-25 08:03:42,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 08:03:42,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2021-03-25 08:03:42,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2021-03-25 08:03:42,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2021-03-25 08:03:42,200 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2021-03-25 08:03:42,200 INFO L185 Difference]: Start difference. First operand has 25 places, 13 transitions, 58 flow. Second operand 5 states and 104 transitions. [2021-03-25 08:03:42,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 17 transitions, 99 flow [2021-03-25 08:03:42,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 81 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-03-25 08:03:42,202 INFO L241 Difference]: Finished difference. Result has 28 places, 14 transitions, 69 flow [2021-03-25 08:03:42,202 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=69, PETRI_PLACES=28, PETRI_TRANSITIONS=14} [2021-03-25 08:03:42,203 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2021-03-25 08:03:42,203 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 08:03:42,203 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 14 transitions, 69 flow [2021-03-25 08:03:42,203 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 14 transitions, 69 flow [2021-03-25 08:03:42,204 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 14 transitions, 69 flow [2021-03-25 08:03:42,211 INFO L129 PetriNetUnfolder]: 3/25 cut-off events. [2021-03-25 08:03:42,212 INFO L130 PetriNetUnfolder]: For 23/24 co-relation queries the response was YES. [2021-03-25 08:03:42,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 25 events. 3/25 cut-off events. For 23/24 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 55 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 47. Up to 6 conditions per place. [2021-03-25 08:03:42,212 INFO L142 LiptonReduction]: Number of co-enabled transitions 18 [2021-03-25 08:03:42,214 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 08:03:42,214 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 08:03:42,214 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 11 [2021-03-25 08:03:42,216 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 14 transitions, 69 flow [2021-03-25 08:03:42,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-03-25 08:03:42,216 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 08:03:42,216 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 08:03:42,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-25 08:03:42,217 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 08:03:42,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 08:03:42,217 INFO L82 PathProgramCache]: Analyzing trace with hash 902364692, now seen corresponding path program 4 times [2021-03-25 08:03:42,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 08:03:42,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019867488] [2021-03-25 08:03:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 08:03:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 08:03:42,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:42,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 08:03:42,243 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:42,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 08:03:42,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:42,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-25 08:03:42,267 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-03-25 08:03:42,267 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 08:03:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 08:03:42,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019867488] [2021-03-25 08:03:42,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 08:03:42,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 08:03:42,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549695778] [2021-03-25 08:03:42,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 08:03:42,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 08:03:42,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 08:03:42,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-25 08:03:42,284 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2021-03-25 08:03:42,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 14 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-03-25 08:03:42,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 08:03:42,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2021-03-25 08:03:42,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 08:03:42,318 INFO L129 PetriNetUnfolder]: 4/27 cut-off events. [2021-03-25 08:03:42,318 INFO L130 PetriNetUnfolder]: For 34/36 co-relation queries the response was YES. [2021-03-25 08:03:42,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 27 events. 4/27 cut-off events. For 34/36 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 66 event pairs, 1 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 63. Up to 6 conditions per place. [2021-03-25 08:03:42,319 INFO L132 encePairwiseOnDemand]: 23/27 looper letters, 3 selfloop transitions, 1 changer transitions 4/16 dead transitions. [2021-03-25 08:03:42,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 16 transitions, 99 flow [2021-03-25 08:03:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 08:03:42,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 08:03:42,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2021-03-25 08:03:42,321 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.762962962962963 [2021-03-25 08:03:42,321 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 103 transitions. [2021-03-25 08:03:42,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 103 transitions. [2021-03-25 08:03:42,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 08:03:42,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 103 transitions. [2021-03-25 08:03:42,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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) [2021-03-25 08:03:42,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2021-03-25 08:03:42,322 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2021-03-25 08:03:42,322 INFO L185 Difference]: Start difference. First operand has 27 places, 14 transitions, 69 flow. Second operand 5 states and 103 transitions. [2021-03-25 08:03:42,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 16 transitions, 99 flow [2021-03-25 08:03:42,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 16 transitions, 95 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-25 08:03:42,324 INFO L241 Difference]: Finished difference. Result has 31 places, 12 transitions, 56 flow [2021-03-25 08:03:42,324 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=56, PETRI_PLACES=31, PETRI_TRANSITIONS=12} [2021-03-25 08:03:42,324 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2021-03-25 08:03:42,324 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 08:03:42,325 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 31 places, 12 transitions, 56 flow [2021-03-25 08:03:42,325 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 31 places, 12 transitions, 56 flow [2021-03-25 08:03:42,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 12 transitions, 56 flow [2021-03-25 08:03:42,328 INFO L129 PetriNetUnfolder]: 1/12 cut-off events. [2021-03-25 08:03:42,329 INFO L130 PetriNetUnfolder]: For 14/15 co-relation queries the response was YES. [2021-03-25 08:03:42,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 12 events. 1/12 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2021-03-25 08:03:42,329 INFO L142 LiptonReduction]: Number of co-enabled transitions 8 [2021-03-25 08:03:42,330 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 08:03:42,330 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 08:03:42,330 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 6 [2021-03-25 08:03:42,333 INFO L480 AbstractCegarLoop]: Abstraction has has 28 places, 12 transitions, 56 flow [2021-03-25 08:03:42,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-03-25 08:03:42,333 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 08:03:42,333 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 08:03:42,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-25 08:03:42,333 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 08:03:42,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 08:03:42,334 INFO L82 PathProgramCache]: Analyzing trace with hash 71195792, now seen corresponding path program 5 times [2021-03-25 08:03:42,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 08:03:42,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225111488] [2021-03-25 08:03:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 08:03:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 08:03:42,370 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:42,372 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 08:03:42,373 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:42,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 08:03:42,379 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-25 08:03:42,380 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-25 08:03:42,390 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-03-25 08:03:42,391 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 08:03:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 08:03:42,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225111488] [2021-03-25 08:03:42,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 08:03:42,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 08:03:42,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376652788] [2021-03-25 08:03:42,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 08:03:42,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 08:03:42,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 08:03:42,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-25 08:03:42,402 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2021-03-25 08:03:42,402 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 12 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-03-25 08:03:42,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 08:03:42,403 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2021-03-25 08:03:42,403 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 08:03:42,426 INFO L129 PetriNetUnfolder]: 2/20 cut-off events. [2021-03-25 08:03:42,426 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-25 08:03:42,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 20 events. 2/20 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2021-03-25 08:03:42,427 INFO L132 encePairwiseOnDemand]: 23/27 looper letters, 3 selfloop transitions, 1 changer transitions 2/14 dead transitions. [2021-03-25 08:03:42,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 14 transitions, 87 flow [2021-03-25 08:03:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 08:03:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 08:03:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2021-03-25 08:03:42,428 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7555555555555555 [2021-03-25 08:03:42,428 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 102 transitions. [2021-03-25 08:03:42,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 102 transitions. [2021-03-25 08:03:42,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 08:03:42,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 102 transitions. [2021-03-25 08:03:42,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-03-25 08:03:42,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2021-03-25 08:03:42,429 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2021-03-25 08:03:42,429 INFO L185 Difference]: Start difference. First operand has 28 places, 12 transitions, 56 flow. Second operand 5 states and 102 transitions. [2021-03-25 08:03:42,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 14 transitions, 87 flow [2021-03-25 08:03:42,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 14 transitions, 59 flow, removed 5 selfloop flow, removed 9 redundant places. [2021-03-25 08:03:42,431 INFO L241 Difference]: Finished difference. Result has 26 places, 12 transitions, 46 flow [2021-03-25 08:03:42,431 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=46, PETRI_PLACES=26, PETRI_TRANSITIONS=12} [2021-03-25 08:03:42,431 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2021-03-25 08:03:42,431 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 08:03:42,431 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 26 places, 12 transitions, 46 flow [2021-03-25 08:03:42,431 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 26 places, 12 transitions, 46 flow [2021-03-25 08:03:42,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 12 transitions, 46 flow [2021-03-25 08:03:42,433 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2021-03-25 08:03:42,433 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-25 08:03:42,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 13 events. 1/13 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2021-03-25 08:03:42,433 INFO L142 LiptonReduction]: Number of co-enabled transitions 6 [2021-03-25 08:03:42,434 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 08:03:42,435 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 08:03:42,435 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4 [2021-03-25 08:03:42,436 INFO L480 AbstractCegarLoop]: Abstraction has has 24 places, 12 transitions, 46 flow [2021-03-25 08:03:42,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-03-25 08:03:42,436 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 08:03:42,436 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 08:03:42,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-25 08:03:42,436 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 08:03:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 08:03:42,436 INFO L82 PathProgramCache]: Analyzing trace with hash -832248358, now seen corresponding path program 1 times [2021-03-25 08:03:42,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 08:03:42,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251628746] [2021-03-25 08:03:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 08:03:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 08:03:42,451 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:42,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 08:03:42,452 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:42,452 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 08:03:42,454 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:42,454 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 08:03:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 08:03:42,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251628746] [2021-03-25 08:03:42,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 08:03:42,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 08:03:42,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145877286] [2021-03-25 08:03:42,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-25 08:03:42,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 08:03:42,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-25 08:03:42,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-25 08:03:42,456 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 27 [2021-03-25 08:03:42,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 12 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-03-25 08:03:42,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 08:03:42,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 27 [2021-03-25 08:03:42,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 08:03:42,459 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-25 08:03:42,459 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-03-25 08:03:42,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 11 events. 0/11 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 08:03:42,460 INFO L132 encePairwiseOnDemand]: 25/27 looper letters, 1 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2021-03-25 08:03:42,460 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 10 transitions, 44 flow [2021-03-25 08:03:42,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-25 08:03:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-25 08:03:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2021-03-25 08:03:42,460 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2021-03-25 08:03:42,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 72 transitions. [2021-03-25 08:03:42,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 72 transitions. [2021-03-25 08:03:42,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 08:03:42,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 72 transitions. [2021-03-25 08:03:42,461 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) [2021-03-25 08:03:42,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 08:03:42,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 08:03:42,461 INFO L185 Difference]: Start difference. First operand has 24 places, 12 transitions, 46 flow. Second operand 3 states and 72 transitions. [2021-03-25 08:03:42,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 10 transitions, 44 flow [2021-03-25 08:03:42,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 10 transitions, 35 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-03-25 08:03:42,463 INFO L241 Difference]: Finished difference. Result has 21 places, 10 transitions, 33 flow [2021-03-25 08:03:42,463 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=31, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=33, PETRI_PLACES=21, PETRI_TRANSITIONS=10} [2021-03-25 08:03:42,463 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2021-03-25 08:03:42,463 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 08:03:42,463 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 21 places, 10 transitions, 33 flow [2021-03-25 08:03:42,464 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 21 places, 10 transitions, 33 flow [2021-03-25 08:03:42,464 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 10 transitions, 33 flow [2021-03-25 08:03:42,465 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-25 08:03:42,465 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 08:03:42,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 08:03:42,465 INFO L142 LiptonReduction]: Number of co-enabled transitions 2 [2021-03-25 08:03:42,465 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 08:03:42,465 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 08:03:42,465 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2 [2021-03-25 08:03:42,468 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 10 transitions, 33 flow [2021-03-25 08:03:42,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-03-25 08:03:42,469 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 08:03:42,469 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 08:03:42,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-25 08:03:42,469 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 08:03:42,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 08:03:42,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1788944852, now seen corresponding path program 6 times [2021-03-25 08:03:42,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 08:03:42,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534669841] [2021-03-25 08:03:42,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 08:03:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 08:03:42,497 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:42,499 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 08:03:42,502 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:03:42,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 08:03:42,508 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-25 08:03:42,509 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-25 08:03:42,518 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-03-25 08:03:42,518 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 08:03:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 08:03:42,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534669841] [2021-03-25 08:03:42,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 08:03:42,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 08:03:42,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112772193] [2021-03-25 08:03:42,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 08:03:42,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 08:03:42,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 08:03:42,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-25 08:03:42,529 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2021-03-25 08:03:42,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 10 transitions, 33 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-03-25 08:03:42,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 08:03:42,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2021-03-25 08:03:42,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 08:03:42,548 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-25 08:03:42,548 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 08:03:42,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 10 events. 0/10 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 08:03:42,548 INFO L132 encePairwiseOnDemand]: 23/27 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-03-25 08:03:42,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 10 transitions, 43 flow [2021-03-25 08:03:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 08:03:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 08:03:42,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2021-03-25 08:03:42,549 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2021-03-25 08:03:42,549 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 100 transitions. [2021-03-25 08:03:42,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 100 transitions. [2021-03-25 08:03:42,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 08:03:42,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 100 transitions. [2021-03-25 08:03:42,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2021-03-25 08:03:42,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2021-03-25 08:03:42,550 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2021-03-25 08:03:42,550 INFO L185 Difference]: Start difference. First operand has 21 places, 10 transitions, 33 flow. Second operand 5 states and 100 transitions. [2021-03-25 08:03:42,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 10 transitions, 43 flow [2021-03-25 08:03:42,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 10 transitions, 42 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-25 08:03:42,551 INFO L241 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2021-03-25 08:03:42,552 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2021-03-25 08:03:42,552 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2021-03-25 08:03:42,552 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 08:03:42,552 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 23 places, 0 transitions, 0 flow [2021-03-25 08:03:42,553 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 23 places, 0 transitions, 0 flow [2021-03-25 08:03:42,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-03-25 08:03:42,553 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-03-25 08:03:42,553 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 08:03:42,553 INFO L84 FinitePrefix]: Finished finitePrefix Result has 0 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs, 0 based on Foata normal form. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 0 conditions per place. [2021-03-25 08:03:42,553 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 08:03:42,553 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 08:03:42,553 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 08:03:42,554 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2 [2021-03-25 08:03:42,554 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-03-25 08:03:42,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-03-25 08:03:42,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-25 08:03:42,557 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 08:03:42 BasicIcfg [2021-03-25 08:03:42,558 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 08:03:42,560 INFO L168 Benchmark]: Toolchain (without parser) took 1144.19 ms. Allocated memory is still 411.0 MB. Free memory was 390.9 MB in the beginning and 275.9 MB in the end (delta: 115.0 MB). Peak memory consumption was 117.9 MB. Max. memory is 16.0 GB. [2021-03-25 08:03:42,560 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 411.0 MB. Free memory was 391.9 MB in the beginning and 391.8 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 08:03:42,560 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.49 ms. Allocated memory is still 411.0 MB. Free memory was 390.8 MB in the beginning and 389.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 08:03:42,561 INFO L168 Benchmark]: Boogie Preprocessor took 10.41 ms. Allocated memory is still 411.0 MB. Free memory was 389.4 MB in the beginning and 388.5 MB in the end (delta: 848.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 08:03:42,561 INFO L168 Benchmark]: RCFGBuilder took 127.38 ms. Allocated memory is still 411.0 MB. Free memory was 388.4 MB in the beginning and 379.6 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-25 08:03:42,561 INFO L168 Benchmark]: TraceAbstraction took 984.20 ms. Allocated memory is still 411.0 MB. Free memory was 379.1 MB in the beginning and 275.9 MB in the end (delta: 103.3 MB). Peak memory consumption was 105.3 MB. Max. memory is 16.0 GB. [2021-03-25 08:03:42,562 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 0.12 ms. Allocated memory is still 411.0 MB. Free memory was 391.9 MB in the beginning and 391.8 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.49 ms. Allocated memory is still 411.0 MB. Free memory was 390.8 MB in the beginning and 389.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.41 ms. Allocated memory is still 411.0 MB. Free memory was 389.4 MB in the beginning and 388.5 MB in the end (delta: 848.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 127.38 ms. Allocated memory is still 411.0 MB. Free memory was 388.4 MB in the beginning and 379.6 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 984.20 ms. Allocated memory is still 411.0 MB. Free memory was 379.1 MB in the beginning and 275.9 MB in the end (delta: 103.3 MB). Peak memory consumption was 105.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 32.4ms, 23 PlacesBefore, 20 PlacesAfterwards, 19 TransitionsBefore, 16 TransitionsAfterwards, 84 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 27 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 27, positive: 27, positive conditional: 0, positive unconditional: 27, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 24, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 24, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 27, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 24, unknown conditional: 0, unknown unconditional: 24] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.8ms, 16 PlacesBefore, 16 PlacesAfterwards, 12 TransitionsBefore, 12 TransitionsAfterwards, 24 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.9ms, 22 PlacesBefore, 21 PlacesAfterwards, 13 TransitionsBefore, 13 TransitionsAfterwards, 24 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.2ms, 26 PlacesBefore, 25 PlacesAfterwards, 13 TransitionsBefore, 13 TransitionsAfterwards, 20 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 11.2ms, 28 PlacesBefore, 27 PlacesAfterwards, 14 TransitionsBefore, 14 TransitionsAfterwards, 18 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.0ms, 31 PlacesBefore, 28 PlacesAfterwards, 12 TransitionsBefore, 12 TransitionsAfterwards, 8 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.3ms, 26 PlacesBefore, 24 PlacesAfterwards, 12 TransitionsBefore, 12 TransitionsAfterwards, 6 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8ms, 21 PlacesBefore, 21 PlacesAfterwards, 10 TransitionsBefore, 10 TransitionsAfterwards, 2 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.0ms, 23 PlacesBefore, 0 PlacesAfterwards, 0 TransitionsBefore, 0 TransitionsAfterwards, 0 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 19]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 926.5ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 256.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 83.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 29 SDslu, 15 SDs, 0 SdLazy, 53 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 45.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 214.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=4, InterpolantAutomatonStates: 36, 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: 9.6ms SsaConstructionTime, 30.2ms SatisfiabilityAnalysisTime, 388.1ms InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 614 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...