/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 15:24:27,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 15:24:27,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 15:24:27,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 15:24:27,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 15:24:27,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 15:24:27,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 15:24:27,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 15:24:27,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 15:24:27,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 15:24:27,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 15:24:27,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 15:24:27,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 15:24:27,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 15:24:27,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 15:24:27,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 15:24:27,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 15:24:27,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 15:24:27,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 15:24:27,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 15:24:27,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 15:24:27,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 15:24:27,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 15:24:27,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 15:24:27,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-24 15:24:27,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-24 15:24:27,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-24 15:24:27,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-24 15:24:27,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-24 15:24:27,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-24 15:24:27,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-24 15:24:27,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-24 15:24:27,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-24 15:24:27,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-24 15:24:27,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-24 15:24:27,466 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-24 15:24:27,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-24 15:24:27,467 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-24 15:24:27,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 15:24:27,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 15:24:27,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 15:24:27,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2021-03-24 15:24:27,527 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 15:24:27,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 15:24:27,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 15:24:27,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 15:24:27,530 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 15:24:27,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 15:24:27,531 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 15:24:27,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 15:24:27,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 15:24:27,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 15:24:27,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 15:24:27,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 15:24:27,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 15:24:27,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 15:24:27,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 15:24:27,532 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 15:24:27,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 15:24:27,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 15:24:27,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 15:24:27,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 15:24:27,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 15:24:27,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 15:24:27,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 15:24:27,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 15:24:27,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 15:24:27,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 15:24:27,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 15:24:27,534 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 15:24:27,534 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 15:24:27,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 15:24:27,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 15:24:27,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 15:24:27,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 15:24:27,807 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 15:24:27,808 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 15:24:27,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl [2021-03-24 15:24:27,809 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl' [2021-03-24 15:24:27,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 15:24:27,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 15:24:27,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 15:24:27,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 15:24:27,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 15:24:27,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:27" (1/1) ... [2021-03-24 15:24:27,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:27" (1/1) ... [2021-03-24 15:24:27,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 15:24:27,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 15:24:27,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 15:24:27,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 15:24:27,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:27" (1/1) ... [2021-03-24 15:24:27,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:27" (1/1) ... [2021-03-24 15:24:27,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:27" (1/1) ... [2021-03-24 15:24:27,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:27" (1/1) ... [2021-03-24 15:24:27,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:27" (1/1) ... [2021-03-24 15:24:27,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:27" (1/1) ... [2021-03-24 15:24:27,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:27" (1/1) ... [2021-03-24 15:24:27,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 15:24:27,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 15:24:27,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 15:24:27,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 15:24:27,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 15:24:27,942 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 15:24:27,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 15:24:27,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 15:24:27,943 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 15:24:27,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 15:24:27,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 15:24:27,943 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 15:24:27,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 15:24:27,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 15:24:27,944 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-24 15:24:27,944 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-24 15:24:27,944 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-24 15:24:27,945 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 15:24:28,086 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 15:24:28,087 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 15:24:28,088 INFO L202 PluginConnector]: Adding new model ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 03:24:28 BoogieIcfgContainer [2021-03-24 15:24:28,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 15:24:28,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 15:24:28,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 15:24:28,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 15:24:28,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:24:27" (1/2) ... [2021-03-24 15:24:28,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13801535 and model type ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 03:24:28, skipping insertion in model container [2021-03-24 15:24:28,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 03:24:28" (2/2) ... [2021-03-24 15:24:28,093 INFO L111 eAbstractionObserver]: Analyzing ICFG ticket-3.wvr.bpl [2021-03-24 15:24:28,098 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 15:24:28,101 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 15:24:28,101 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 15:24:28,132 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-24 15:24:28,147 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-24 15:24:28,163 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 15:24:28,163 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 15:24:28,164 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 15:24:28,164 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 15:24:28,164 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 15:24:28,164 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 15:24:28,164 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 15:24:28,164 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 15:24:28,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 40 places, 30 transitions, 84 flow [2021-03-24 15:24:28,194 INFO L129 PetriNetUnfolder]: 0/27 cut-off events. [2021-03-24 15:24:28,194 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 15:24:28,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 27 events. 0/27 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 15:24:28,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 30 transitions, 84 flow [2021-03-24 15:24:28,199 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 25 transitions, 68 flow [2021-03-24 15:24:28,200 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 15:24:28,207 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 35 places, 25 transitions, 68 flow [2021-03-24 15:24:28,209 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 35 places, 25 transitions, 68 flow [2021-03-24 15:24:28,211 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 35 places, 25 transitions, 68 flow [2021-03-24 15:24:28,223 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-03-24 15:24:28,223 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 15:24:28,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 25 events. 0/25 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 15:24:28,226 INFO L142 LiptonReduction]: Number of co-enabled transitions 234 [2021-03-24 15:24:28,284 INFO L154 LiptonReduction]: Checked pairs total: 490 [2021-03-24 15:24:28,285 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 15:24:28,286 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 87 [2021-03-24 15:24:28,302 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-03-24 15:24:28,302 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 15:24:28,302 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:28,303 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:28,303 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:28,314 INFO L82 PathProgramCache]: Analyzing trace with hash -791429955, now seen corresponding path program 1 times [2021-03-24 15:24:28,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:28,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816905969] [2021-03-24 15:24:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:28,470 INFO L142 QuantifierPusher]: treesize reduction 14, result has 41.7 percent of original size [2021-03-24 15:24:28,473 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 15:24:28,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:28,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:28,531 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:28,532 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:28,532 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:28,533 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-03-24 15:24:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:28,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816905969] [2021-03-24 15:24:28,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:28,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 15:24:28,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30392506] [2021-03-24 15:24:28,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 15:24:28,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:28,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 15:24:28,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-24 15:24:28,568 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 34 [2021-03-24 15:24:28,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 21 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:28,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:28,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 34 [2021-03-24 15:24:28,571 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:28,671 INFO L129 PetriNetUnfolder]: 43/141 cut-off events. [2021-03-24 15:24:28,672 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-03-24 15:24:28,676 INFO L84 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 141 events. 43/141 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 616 event pairs, 18 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 232. Up to 54 conditions per place. [2021-03-24 15:24:28,678 INFO L132 encePairwiseOnDemand]: 25/34 looper letters, 13 selfloop transitions, 7 changer transitions 1/33 dead transitions. [2021-03-24 15:24:28,679 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 33 transitions, 126 flow [2021-03-24 15:24:28,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 15:24:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 15:24:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2021-03-24 15:24:28,691 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8058823529411765 [2021-03-24 15:24:28,692 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 137 transitions. [2021-03-24 15:24:28,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 137 transitions. [2021-03-24 15:24:28,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:28,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 137 transitions. [2021-03-24 15:24:28,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:28,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:28,715 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:28,717 INFO L185 Difference]: Start difference. First operand has 31 places, 21 transitions, 60 flow. Second operand 5 states and 137 transitions. [2021-03-24 15:24:28,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 33 transitions, 126 flow [2021-03-24 15:24:28,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 114 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-24 15:24:28,725 INFO L241 Difference]: Finished difference. Result has 32 places, 26 transitions, 97 flow [2021-03-24 15:24:28,727 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=97, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2021-03-24 15:24:28,728 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2021-03-24 15:24:28,728 INFO L480 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 97 flow [2021-03-24 15:24:28,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:28,728 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:28,728 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:28,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 15:24:28,728 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:28,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1788192761, now seen corresponding path program 2 times [2021-03-24 15:24:28,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:28,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247042888] [2021-03-24 15:24:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:28,788 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:28,789 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:28,794 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:28,794 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:28,799 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:28,800 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:28,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:28,807 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:28,813 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:28,814 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:24:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:28,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247042888] [2021-03-24 15:24:28,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:28,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 15:24:28,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796358467] [2021-03-24 15:24:28,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 15:24:28,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:28,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 15:24:28,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-24 15:24:28,824 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 34 [2021-03-24 15:24:28,824 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 97 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:28,824 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:28,824 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 34 [2021-03-24 15:24:28,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:29,020 INFO L129 PetriNetUnfolder]: 133/340 cut-off events. [2021-03-24 15:24:29,020 INFO L130 PetriNetUnfolder]: For 66/72 co-relation queries the response was YES. [2021-03-24 15:24:29,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 762 conditions, 340 events. 133/340 cut-off events. For 66/72 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1917 event pairs, 35 based on Foata normal form. 6/332 useless extension candidates. Maximal degree in co-relation 731. Up to 79 conditions per place. [2021-03-24 15:24:29,026 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 19 selfloop transitions, 16 changer transitions 0/48 dead transitions. [2021-03-24 15:24:29,026 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 48 transitions, 223 flow [2021-03-24 15:24:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 15:24:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 15:24:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2021-03-24 15:24:29,034 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7647058823529411 [2021-03-24 15:24:29,034 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 156 transitions. [2021-03-24 15:24:29,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 156 transitions. [2021-03-24 15:24:29,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:29,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 156 transitions. [2021-03-24 15:24:29,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,039 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,039 INFO L185 Difference]: Start difference. First operand has 32 places, 26 transitions, 97 flow. Second operand 6 states and 156 transitions. [2021-03-24 15:24:29,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 48 transitions, 223 flow [2021-03-24 15:24:29,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 48 transitions, 210 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-03-24 15:24:29,042 INFO L241 Difference]: Finished difference. Result has 36 places, 38 transitions, 179 flow [2021-03-24 15:24:29,042 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=36, PETRI_TRANSITIONS=38} [2021-03-24 15:24:29,042 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2021-03-24 15:24:29,043 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 38 transitions, 179 flow [2021-03-24 15:24:29,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,043 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:29,043 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:29,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 15:24:29,043 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:29,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:29,044 INFO L82 PathProgramCache]: Analyzing trace with hash -113210933, now seen corresponding path program 3 times [2021-03-24 15:24:29,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:29,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595765704] [2021-03-24 15:24:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:29,090 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,090 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:29,093 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,098 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:24:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:29,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595765704] [2021-03-24 15:24:29,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:29,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 15:24:29,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125713057] [2021-03-24 15:24:29,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 15:24:29,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:29,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 15:24:29,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 15:24:29,108 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 34 [2021-03-24 15:24:29,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:29,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 34 [2021-03-24 15:24:29,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:29,217 INFO L129 PetriNetUnfolder]: 131/356 cut-off events. [2021-03-24 15:24:29,217 INFO L130 PetriNetUnfolder]: For 319/364 co-relation queries the response was YES. [2021-03-24 15:24:29,218 INFO L84 FinitePrefix]: Finished finitePrefix Result has 993 conditions, 356 events. 131/356 cut-off events. For 319/364 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1962 event pairs, 32 based on Foata normal form. 26/368 useless extension candidates. Maximal degree in co-relation 950. Up to 174 conditions per place. [2021-03-24 15:24:29,221 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 28 selfloop transitions, 15 changer transitions 1/57 dead transitions. [2021-03-24 15:24:29,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 57 transitions, 362 flow [2021-03-24 15:24:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 15:24:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 15:24:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2021-03-24 15:24:29,224 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7588235294117647 [2021-03-24 15:24:29,224 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 129 transitions. [2021-03-24 15:24:29,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 129 transitions. [2021-03-24 15:24:29,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:29,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 129 transitions. [2021-03-24 15:24:29,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,228 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,228 INFO L185 Difference]: Start difference. First operand has 36 places, 38 transitions, 179 flow. Second operand 5 states and 129 transitions. [2021-03-24 15:24:29,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 57 transitions, 362 flow [2021-03-24 15:24:29,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 57 transitions, 346 flow, removed 6 selfloop flow, removed 1 redundant places. [2021-03-24 15:24:29,238 INFO L241 Difference]: Finished difference. Result has 41 places, 47 transitions, 277 flow [2021-03-24 15:24:29,238 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=41, PETRI_TRANSITIONS=47} [2021-03-24 15:24:29,238 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2021-03-24 15:24:29,239 INFO L480 AbstractCegarLoop]: Abstraction has has 41 places, 47 transitions, 277 flow [2021-03-24 15:24:29,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,239 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:29,239 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:29,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 15:24:29,239 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:29,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:29,240 INFO L82 PathProgramCache]: Analyzing trace with hash 557841323, now seen corresponding path program 4 times [2021-03-24 15:24:29,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:29,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828399220] [2021-03-24 15:24:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:29,282 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,283 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:29,286 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,287 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,297 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,297 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,317 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:24:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:29,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828399220] [2021-03-24 15:24:29,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:29,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 15:24:29,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646666579] [2021-03-24 15:24:29,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 15:24:29,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:29,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 15:24:29,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 15:24:29,320 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 34 [2021-03-24 15:24:29,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 47 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:29,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 34 [2021-03-24 15:24:29,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:29,429 INFO L129 PetriNetUnfolder]: 101/317 cut-off events. [2021-03-24 15:24:29,429 INFO L130 PetriNetUnfolder]: For 478/513 co-relation queries the response was YES. [2021-03-24 15:24:29,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1004 conditions, 317 events. 101/317 cut-off events. For 478/513 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1799 event pairs, 24 based on Foata normal form. 43/353 useless extension candidates. Maximal degree in co-relation 959. Up to 154 conditions per place. [2021-03-24 15:24:29,432 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 28 selfloop transitions, 16 changer transitions 2/59 dead transitions. [2021-03-24 15:24:29,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 433 flow [2021-03-24 15:24:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 15:24:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 15:24:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2021-03-24 15:24:29,434 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7588235294117647 [2021-03-24 15:24:29,434 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 129 transitions. [2021-03-24 15:24:29,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 129 transitions. [2021-03-24 15:24:29,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:29,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 129 transitions. [2021-03-24 15:24:29,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,436 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,436 INFO L185 Difference]: Start difference. First operand has 41 places, 47 transitions, 277 flow. Second operand 5 states and 129 transitions. [2021-03-24 15:24:29,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 433 flow [2021-03-24 15:24:29,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 59 transitions, 429 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 15:24:29,441 INFO L241 Difference]: Finished difference. Result has 46 places, 49 transitions, 339 flow [2021-03-24 15:24:29,442 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=46, PETRI_TRANSITIONS=49} [2021-03-24 15:24:29,444 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 15 predicate places. [2021-03-24 15:24:29,444 INFO L480 AbstractCegarLoop]: Abstraction has has 46 places, 49 transitions, 339 flow [2021-03-24 15:24:29,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,445 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:29,445 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:29,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 15:24:29,446 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:29,447 INFO L82 PathProgramCache]: Analyzing trace with hash 168443439, now seen corresponding path program 5 times [2021-03-24 15:24:29,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:29,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948310683] [2021-03-24 15:24:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:29,497 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,498 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:29,501 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,501 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,504 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,505 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,509 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,510 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,515 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,515 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:24:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:29,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948310683] [2021-03-24 15:24:29,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:29,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 15:24:29,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796685256] [2021-03-24 15:24:29,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 15:24:29,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:29,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 15:24:29,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-24 15:24:29,518 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 34 [2021-03-24 15:24:29,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 339 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:29,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 34 [2021-03-24 15:24:29,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:29,610 INFO L129 PetriNetUnfolder]: 95/291 cut-off events. [2021-03-24 15:24:29,610 INFO L130 PetriNetUnfolder]: For 570/623 co-relation queries the response was YES. [2021-03-24 15:24:29,611 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 291 events. 95/291 cut-off events. For 570/623 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1593 event pairs, 13 based on Foata normal form. 37/319 useless extension candidates. Maximal degree in co-relation 959. Up to 72 conditions per place. [2021-03-24 15:24:29,613 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 19 selfloop transitions, 27 changer transitions 0/59 dead transitions. [2021-03-24 15:24:29,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 482 flow [2021-03-24 15:24:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 15:24:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 15:24:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2021-03-24 15:24:29,614 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7598039215686274 [2021-03-24 15:24:29,614 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 155 transitions. [2021-03-24 15:24:29,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 155 transitions. [2021-03-24 15:24:29,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:29,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 155 transitions. [2021-03-24 15:24:29,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,616 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,616 INFO L185 Difference]: Start difference. First operand has 46 places, 49 transitions, 339 flow. Second operand 6 states and 155 transitions. [2021-03-24 15:24:29,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 482 flow [2021-03-24 15:24:29,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 59 transitions, 455 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-03-24 15:24:29,620 INFO L241 Difference]: Finished difference. Result has 50 places, 51 transitions, 413 flow [2021-03-24 15:24:29,620 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2021-03-24 15:24:29,620 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 19 predicate places. [2021-03-24 15:24:29,620 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 413 flow [2021-03-24 15:24:29,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,621 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:29,621 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:29,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 15:24:29,621 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:29,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:29,622 INFO L82 PathProgramCache]: Analyzing trace with hash 683408503, now seen corresponding path program 6 times [2021-03-24 15:24:29,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:29,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825619475] [2021-03-24 15:24:29,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:29,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,672 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:29,674 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,678 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,678 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,683 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,684 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,684 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,684 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,689 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,690 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:24:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:29,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825619475] [2021-03-24 15:24:29,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:29,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 15:24:29,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91793813] [2021-03-24 15:24:29,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 15:24:29,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:29,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 15:24:29,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-24 15:24:29,692 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 34 [2021-03-24 15:24:29,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 413 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:29,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 34 [2021-03-24 15:24:29,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:29,787 INFO L129 PetriNetUnfolder]: 53/189 cut-off events. [2021-03-24 15:24:29,788 INFO L130 PetriNetUnfolder]: For 519/555 co-relation queries the response was YES. [2021-03-24 15:24:29,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 189 events. 53/189 cut-off events. For 519/555 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 878 event pairs, 10 based on Foata normal form. 36/223 useless extension candidates. Maximal degree in co-relation 696. Up to 55 conditions per place. [2021-03-24 15:24:29,789 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 19 selfloop transitions, 23 changer transitions 4/59 dead transitions. [2021-03-24 15:24:29,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 531 flow [2021-03-24 15:24:29,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 15:24:29,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 15:24:29,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2021-03-24 15:24:29,791 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7598039215686274 [2021-03-24 15:24:29,791 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 155 transitions. [2021-03-24 15:24:29,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 155 transitions. [2021-03-24 15:24:29,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:29,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 155 transitions. [2021-03-24 15:24:29,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,792 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,792 INFO L185 Difference]: Start difference. First operand has 50 places, 51 transitions, 413 flow. Second operand 6 states and 155 transitions. [2021-03-24 15:24:29,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 531 flow [2021-03-24 15:24:29,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 495 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-24 15:24:29,798 INFO L241 Difference]: Finished difference. Result has 52 places, 47 transitions, 385 flow [2021-03-24 15:24:29,798 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2021-03-24 15:24:29,798 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2021-03-24 15:24:29,799 INFO L480 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 385 flow [2021-03-24 15:24:29,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,799 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:29,799 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:29,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 15:24:29,799 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:29,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1380036545, now seen corresponding path program 7 times [2021-03-24 15:24:29,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:29,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930595345] [2021-03-24 15:24:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:29,838 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,839 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:29,842 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,852 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,853 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:29,865 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:29,865 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:24:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:29,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930595345] [2021-03-24 15:24:29,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:29,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-24 15:24:29,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382794529] [2021-03-24 15:24:29,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 15:24:29,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:29,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 15:24:29,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-24 15:24:29,868 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 34 [2021-03-24 15:24:29,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 385 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:29,869 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 34 [2021-03-24 15:24:29,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:29,983 INFO L129 PetriNetUnfolder]: 41/158 cut-off events. [2021-03-24 15:24:29,983 INFO L130 PetriNetUnfolder]: For 466/482 co-relation queries the response was YES. [2021-03-24 15:24:29,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 158 events. 41/158 cut-off events. For 466/482 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 698 event pairs, 11 based on Foata normal form. 12/168 useless extension candidates. Maximal degree in co-relation 304. Up to 52 conditions per place. [2021-03-24 15:24:29,984 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 19 selfloop transitions, 18 changer transitions 7/57 dead transitions. [2021-03-24 15:24:29,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 523 flow [2021-03-24 15:24:29,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 15:24:29,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 15:24:29,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2021-03-24 15:24:29,986 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7316176470588235 [2021-03-24 15:24:29,986 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 199 transitions. [2021-03-24 15:24:29,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 199 transitions. [2021-03-24 15:24:29,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:29,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 199 transitions. [2021-03-24 15:24:29,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 24.875) internal successors, (199), 8 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,988 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,988 INFO L185 Difference]: Start difference. First operand has 52 places, 47 transitions, 385 flow. Second operand 8 states and 199 transitions. [2021-03-24 15:24:29,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 523 flow [2021-03-24 15:24:29,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 57 transitions, 472 flow, removed 9 selfloop flow, removed 4 redundant places. [2021-03-24 15:24:29,992 INFO L241 Difference]: Finished difference. Result has 57 places, 42 transitions, 330 flow [2021-03-24 15:24:29,992 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=57, PETRI_TRANSITIONS=42} [2021-03-24 15:24:29,993 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 26 predicate places. [2021-03-24 15:24:29,993 INFO L480 AbstractCegarLoop]: Abstraction has has 57 places, 42 transitions, 330 flow [2021-03-24 15:24:29,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:29,993 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:29,993 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:29,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-24 15:24:29,993 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:29,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:29,994 INFO L82 PathProgramCache]: Analyzing trace with hash -442663005, now seen corresponding path program 8 times [2021-03-24 15:24:29,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:29,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797100092] [2021-03-24 15:24:29,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:30,018 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:30,022 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,027 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,027 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,033 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,037 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,038 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,044 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:24:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:30,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797100092] [2021-03-24 15:24:30,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:30,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-24 15:24:30,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500924992] [2021-03-24 15:24:30,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 15:24:30,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:30,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 15:24:30,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-24 15:24:30,049 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 34 [2021-03-24 15:24:30,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 330 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:30,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 34 [2021-03-24 15:24:30,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:30,163 INFO L129 PetriNetUnfolder]: 35/138 cut-off events. [2021-03-24 15:24:30,164 INFO L130 PetriNetUnfolder]: For 472/492 co-relation queries the response was YES. [2021-03-24 15:24:30,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 138 events. 35/138 cut-off events. For 472/492 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 574 event pairs, 11 based on Foata normal form. 15/151 useless extension candidates. Maximal degree in co-relation 281. Up to 50 conditions per place. [2021-03-24 15:24:30,165 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 16 selfloop transitions, 13 changer transitions 13/55 dead transitions. [2021-03-24 15:24:30,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 491 flow [2021-03-24 15:24:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 15:24:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 15:24:30,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2021-03-24 15:24:30,167 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7352941176470589 [2021-03-24 15:24:30,167 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 200 transitions. [2021-03-24 15:24:30,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 200 transitions. [2021-03-24 15:24:30,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:30,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 200 transitions. [2021-03-24 15:24:30,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,170 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,170 INFO L185 Difference]: Start difference. First operand has 57 places, 42 transitions, 330 flow. Second operand 8 states and 200 transitions. [2021-03-24 15:24:30,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 491 flow [2021-03-24 15:24:30,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 433 flow, removed 13 selfloop flow, removed 6 redundant places. [2021-03-24 15:24:30,174 INFO L241 Difference]: Finished difference. Result has 57 places, 36 transitions, 255 flow [2021-03-24 15:24:30,175 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=255, PETRI_PLACES=57, PETRI_TRANSITIONS=36} [2021-03-24 15:24:30,175 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 26 predicate places. [2021-03-24 15:24:30,175 INFO L480 AbstractCegarLoop]: Abstraction has has 57 places, 36 transitions, 255 flow [2021-03-24 15:24:30,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,175 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:30,175 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:30,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-24 15:24:30,176 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:30,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:30,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1022323289, now seen corresponding path program 9 times [2021-03-24 15:24:30,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:30,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539104670] [2021-03-24 15:24:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:30,195 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:30,199 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,202 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,203 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 15:24:30,207 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,207 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,208 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,208 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,212 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:24:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:30,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539104670] [2021-03-24 15:24:30,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:30,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 15:24:30,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908500008] [2021-03-24 15:24:30,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 15:24:30,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:30,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 15:24:30,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-24 15:24:30,215 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 34 [2021-03-24 15:24:30,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 36 transitions, 255 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:30,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 34 [2021-03-24 15:24:30,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:30,273 INFO L129 PetriNetUnfolder]: 27/131 cut-off events. [2021-03-24 15:24:30,273 INFO L130 PetriNetUnfolder]: For 393/406 co-relation queries the response was YES. [2021-03-24 15:24:30,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 131 events. 27/131 cut-off events. For 393/406 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 551 event pairs, 6 based on Foata normal form. 14/143 useless extension candidates. Maximal degree in co-relation 278. Up to 32 conditions per place. [2021-03-24 15:24:30,274 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 11 selfloop transitions, 20 changer transitions 7/51 dead transitions. [2021-03-24 15:24:30,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 405 flow [2021-03-24 15:24:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 15:24:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 15:24:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2021-03-24 15:24:30,275 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7303921568627451 [2021-03-24 15:24:30,275 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 149 transitions. [2021-03-24 15:24:30,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 149 transitions. [2021-03-24 15:24:30,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:30,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 149 transitions. [2021-03-24 15:24:30,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,276 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,277 INFO L185 Difference]: Start difference. First operand has 57 places, 36 transitions, 255 flow. Second operand 6 states and 149 transitions. [2021-03-24 15:24:30,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 405 flow [2021-03-24 15:24:30,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 330 flow, removed 9 selfloop flow, removed 13 redundant places. [2021-03-24 15:24:30,279 INFO L241 Difference]: Finished difference. Result has 47 places, 41 transitions, 277 flow [2021-03-24 15:24:30,280 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2021-03-24 15:24:30,280 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2021-03-24 15:24:30,280 INFO L480 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 277 flow [2021-03-24 15:24:30,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,280 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:30,280 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:30,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-24 15:24:30,280 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:30,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:30,281 INFO L82 PathProgramCache]: Analyzing trace with hash 344546869, now seen corresponding path program 10 times [2021-03-24 15:24:30,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:30,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587182063] [2021-03-24 15:24:30,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:30,298 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,299 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:30,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,302 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,305 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 15:24:30,309 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:24:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:30,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587182063] [2021-03-24 15:24:30,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:30,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 15:24:30,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410997499] [2021-03-24 15:24:30,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 15:24:30,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:30,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 15:24:30,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-24 15:24:30,319 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 34 [2021-03-24 15:24:30,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 277 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:30,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 34 [2021-03-24 15:24:30,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:30,371 INFO L129 PetriNetUnfolder]: 17/97 cut-off events. [2021-03-24 15:24:30,371 INFO L130 PetriNetUnfolder]: For 304/319 co-relation queries the response was YES. [2021-03-24 15:24:30,371 INFO L84 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 97 events. 17/97 cut-off events. For 304/319 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 328 event pairs, 7 based on Foata normal form. 13/109 useless extension candidates. Maximal degree in co-relation 205. Up to 29 conditions per place. [2021-03-24 15:24:30,372 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 10 selfloop transitions, 15 changer transitions 5/42 dead transitions. [2021-03-24 15:24:30,372 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 42 transitions, 341 flow [2021-03-24 15:24:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 15:24:30,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 15:24:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2021-03-24 15:24:30,373 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7009803921568627 [2021-03-24 15:24:30,373 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 143 transitions. [2021-03-24 15:24:30,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 143 transitions. [2021-03-24 15:24:30,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:30,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 143 transitions. [2021-03-24 15:24:30,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,374 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,374 INFO L185 Difference]: Start difference. First operand has 47 places, 41 transitions, 277 flow. Second operand 6 states and 143 transitions. [2021-03-24 15:24:30,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 42 transitions, 341 flow [2021-03-24 15:24:30,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 302 flow, removed 10 selfloop flow, removed 5 redundant places. [2021-03-24 15:24:30,376 INFO L241 Difference]: Finished difference. Result has 48 places, 35 transitions, 229 flow [2021-03-24 15:24:30,377 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=229, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2021-03-24 15:24:30,377 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2021-03-24 15:24:30,377 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 229 flow [2021-03-24 15:24:30,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,377 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:30,377 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:30,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-24 15:24:30,378 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:30,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:30,378 INFO L82 PathProgramCache]: Analyzing trace with hash -444156165, now seen corresponding path program 11 times [2021-03-24 15:24:30,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:30,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454004601] [2021-03-24 15:24:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:30,403 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:30,406 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,406 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,410 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,413 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,417 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,417 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,418 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,418 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,423 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:24:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:30,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454004601] [2021-03-24 15:24:30,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:30,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 15:24:30,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525598180] [2021-03-24 15:24:30,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 15:24:30,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:30,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 15:24:30,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-24 15:24:30,427 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 34 [2021-03-24 15:24:30,427 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:30,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 34 [2021-03-24 15:24:30,427 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:30,477 INFO L129 PetriNetUnfolder]: 11/65 cut-off events. [2021-03-24 15:24:30,477 INFO L130 PetriNetUnfolder]: For 168/178 co-relation queries the response was YES. [2021-03-24 15:24:30,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 65 events. 11/65 cut-off events. For 168/178 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 159 event pairs, 4 based on Foata normal form. 8/73 useless extension candidates. Maximal degree in co-relation 197. Up to 24 conditions per place. [2021-03-24 15:24:30,478 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 15 selfloop transitions, 8 changer transitions 3/38 dead transitions. [2021-03-24 15:24:30,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 38 transitions, 279 flow [2021-03-24 15:24:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 15:24:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 15:24:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2021-03-24 15:24:30,479 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7009803921568627 [2021-03-24 15:24:30,479 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 143 transitions. [2021-03-24 15:24:30,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 143 transitions. [2021-03-24 15:24:30,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:30,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 143 transitions. [2021-03-24 15:24:30,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,480 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,480 INFO L185 Difference]: Start difference. First operand has 48 places, 35 transitions, 229 flow. Second operand 6 states and 143 transitions. [2021-03-24 15:24:30,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 38 transitions, 279 flow [2021-03-24 15:24:30,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 237 flow, removed 4 selfloop flow, removed 8 redundant places. [2021-03-24 15:24:30,482 INFO L241 Difference]: Finished difference. Result has 45 places, 31 transitions, 171 flow [2021-03-24 15:24:30,482 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=171, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2021-03-24 15:24:30,482 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2021-03-24 15:24:30,482 INFO L480 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 171 flow [2021-03-24 15:24:30,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,482 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:30,483 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:30,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-24 15:24:30,483 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:30,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:30,483 INFO L82 PathProgramCache]: Analyzing trace with hash 16181721, now seen corresponding path program 12 times [2021-03-24 15:24:30,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:30,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965698599] [2021-03-24 15:24:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:30,507 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,509 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:30,516 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,516 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,520 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,521 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,525 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,526 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,530 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,530 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,540 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,542 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:24:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:30,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965698599] [2021-03-24 15:24:30,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:30,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-24 15:24:30,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707089431] [2021-03-24 15:24:30,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 15:24:30,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:30,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 15:24:30,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-24 15:24:30,544 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 34 [2021-03-24 15:24:30,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 171 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:30,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 34 [2021-03-24 15:24:30,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:30,609 INFO L129 PetriNetUnfolder]: 6/43 cut-off events. [2021-03-24 15:24:30,609 INFO L130 PetriNetUnfolder]: For 87/92 co-relation queries the response was YES. [2021-03-24 15:24:30,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 43 events. 6/43 cut-off events. For 87/92 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 3 based on Foata normal form. 3/46 useless extension candidates. Maximal degree in co-relation 86. Up to 17 conditions per place. [2021-03-24 15:24:30,609 INFO L132 encePairwiseOnDemand]: 28/34 looper letters, 9 selfloop transitions, 3 changer transitions 6/30 dead transitions. [2021-03-24 15:24:30,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 30 transitions, 187 flow [2021-03-24 15:24:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 15:24:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 15:24:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2021-03-24 15:24:30,610 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6596638655462185 [2021-03-24 15:24:30,611 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 157 transitions. [2021-03-24 15:24:30,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 157 transitions. [2021-03-24 15:24:30,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:30,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 157 transitions. [2021-03-24 15:24:30,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,612 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,612 INFO L185 Difference]: Start difference. First operand has 45 places, 31 transitions, 171 flow. Second operand 7 states and 157 transitions. [2021-03-24 15:24:30,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 30 transitions, 187 flow [2021-03-24 15:24:30,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 30 transitions, 166 flow, removed 1 selfloop flow, removed 8 redundant places. [2021-03-24 15:24:30,614 INFO L241 Difference]: Finished difference. Result has 43 places, 24 transitions, 109 flow [2021-03-24 15:24:30,614 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=109, PETRI_PLACES=43, PETRI_TRANSITIONS=24} [2021-03-24 15:24:30,614 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2021-03-24 15:24:30,614 INFO L480 AbstractCegarLoop]: Abstraction has has 43 places, 24 transitions, 109 flow [2021-03-24 15:24:30,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,615 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:24:30,615 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:24:30,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-24 15:24:30,615 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:24:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:24:30,616 INFO L82 PathProgramCache]: Analyzing trace with hash -163685629, now seen corresponding path program 13 times [2021-03-24 15:24:30,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:24:30,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081403641] [2021-03-24 15:24:30,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:24:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:24:30,632 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,632 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:24:30,635 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,635 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,639 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,639 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 15:24:30,643 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,644 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,644 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 15:24:30,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:24:30,649 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:24:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:24:30,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081403641] [2021-03-24 15:24:30,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:24:30,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 15:24:30,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919189142] [2021-03-24 15:24:30,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 15:24:30,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:24:30,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 15:24:30,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-24 15:24:30,651 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 34 [2021-03-24 15:24:30,651 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 24 transitions, 109 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:24:30,651 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 34 [2021-03-24 15:24:30,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:24:30,672 INFO L129 PetriNetUnfolder]: 1/14 cut-off events. [2021-03-24 15:24:30,673 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2021-03-24 15:24:30,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 14 events. 1/14 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 5 event pairs, 0 based on Foata normal form. 2/16 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2021-03-24 15:24:30,673 INFO L132 encePairwiseOnDemand]: 28/34 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-03-24 15:24:30,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 13 transitions, 76 flow [2021-03-24 15:24:30,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 15:24:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 15:24:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2021-03-24 15:24:30,674 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6323529411764706 [2021-03-24 15:24:30,674 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 129 transitions. [2021-03-24 15:24:30,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 129 transitions. [2021-03-24 15:24:30,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:24:30,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 129 transitions. [2021-03-24 15:24:30,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,675 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,675 INFO L185 Difference]: Start difference. First operand has 43 places, 24 transitions, 109 flow. Second operand 6 states and 129 transitions. [2021-03-24 15:24:30,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 13 transitions, 76 flow [2021-03-24 15:24:30,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 13 transitions, 52 flow, removed 3 selfloop flow, removed 10 redundant places. [2021-03-24 15:24:30,676 INFO L241 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2021-03-24 15:24:30,676 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2021-03-24 15:24:30,676 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2021-03-24 15:24:30,676 INFO L480 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2021-03-24 15:24:30,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:24:30,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-24 15:24:30,680 INFO L202 PluginConnector]: Adding new model ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 03:24:30 BasicIcfg [2021-03-24 15:24:30,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 15:24:30,681 INFO L168 Benchmark]: Toolchain (without parser) took 2829.70 ms. Allocated memory was 255.9 MB in the beginning and 423.6 MB in the end (delta: 167.8 MB). Free memory was 236.8 MB in the beginning and 375.7 MB in the end (delta: -138.9 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.0 GB. [2021-03-24 15:24:30,681 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 238.0 MB in the beginning and 238.0 MB in the end (delta: 26.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 15:24:30,682 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.10 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 15:24:30,682 INFO L168 Benchmark]: Boogie Preprocessor took 11.69 ms. Allocated memory is still 255.9 MB. Free memory was 235.4 MB in the beginning and 234.4 MB in the end (delta: 941.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 15:24:30,682 INFO L168 Benchmark]: RCFGBuilder took 197.39 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 238.4 MB in the end (delta: -3.9 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. [2021-03-24 15:24:30,682 INFO L168 Benchmark]: TraceAbstraction took 2591.19 ms. Allocated memory was 255.9 MB in the beginning and 423.6 MB in the end (delta: 167.8 MB). Free memory was 237.7 MB in the beginning and 375.7 MB in the end (delta: -138.0 MB). Peak memory consumption was 29.6 MB. Max. memory is 16.0 GB. [2021-03-24 15:24:30,683 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 255.9 MB. Free memory was 238.0 MB in the beginning and 238.0 MB in the end (delta: 26.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.10 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.69 ms. Allocated memory is still 255.9 MB. Free memory was 235.4 MB in the beginning and 234.4 MB in the end (delta: 941.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 197.39 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 238.4 MB in the end (delta: -3.9 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2591.19 ms. Allocated memory was 255.9 MB in the beginning and 423.6 MB in the end (delta: 167.8 MB). Free memory was 237.7 MB in the beginning and 375.7 MB in the end (delta: -138.0 MB). Peak memory consumption was 29.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 75.3ms, 35 PlacesBefore, 31 PlacesAfterwards, 25 TransitionsBefore, 21 TransitionsAfterwards, 234 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 490 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 198, positive: 159, positive conditional: 0, positive unconditional: 159, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 95, positive: 78, positive conditional: 0, positive unconditional: 78, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 95, positive: 78, positive conditional: 0, positive unconditional: 78, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 198, positive: 81, positive conditional: 0, positive unconditional: 81, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 95, unknown conditional: 0, unknown unconditional: 95] , Statistics on independence cache: Total cache size (in pairs): 53, Positive cache size: 41, Positive conditional cache size: 0, Positive unconditional cache size: 41, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12 - PositiveResult [Line: 65]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 11.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2517.3ms, OverallIterations: 13, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1384.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 126.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 24 SDtfs, 83 SDslu, 5 SDs, 0 SdLazy, 831 SolverSat, 112 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 448.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 376.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=413occurred in iteration=5, InterpolantAutomatonStates: 80, 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: 41.4ms SsaConstructionTime, 163.1ms SatisfiabilityAnalysisTime, 607.2ms InterpolantComputationTime, 273 NumberOfCodeBlocks, 273 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 260 ConstructedInterpolants, 0 QuantifiedInterpolants, 700 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 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...