/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/chl/node-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 14:48:19,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 14:48:19,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 14:48:19,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 14:48:19,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 14:48:19,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 14:48:19,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 14:48:19,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 14:48:19,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 14:48:19,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 14:48:19,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 14:48:19,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 14:48:19,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 14:48:19,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 14:48:19,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 14:48:19,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 14:48:19,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 14:48:19,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 14:48:19,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 14:48:19,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 14:48:19,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 14:48:19,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 14:48:19,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 14:48:19,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 14:48:19,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 14:48:19,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-24 14:48:19,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-24 14:48:19,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-24 14:48:19,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-24 14:48:19,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-24 14:48:19,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-24 14:48:19,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-24 14:48:19,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-24 14:48:19,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 14:48:19,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 14:48:19,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 14:48:19,635 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 14:48:19,661 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 14:48:19,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 14:48:19,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 14:48:19,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 14:48:19,664 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 14:48:19,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 14:48:19,664 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 14:48:19,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 14:48:19,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 14:48:19,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 14:48:19,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 14:48:19,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 14:48:19,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 14:48:19,666 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 14:48:19,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 14:48:19,666 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 14:48:19,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 14:48:19,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 14:48:19,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 14:48:19,666 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 14:48:19,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 14:48:19,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 14:48:19,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 14:48:19,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 14:48:19,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 14:48:19,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 14:48:19,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 14:48:19,667 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 14:48:19,667 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 14:48:19,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 14:48:19,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 14:48:20,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 14:48:20,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 14:48:20,020 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 14:48:20,021 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 14:48:20,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/node-trans.wvr.bpl [2021-03-24 14:48:20,022 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/node-trans.wvr.bpl' [2021-03-24 14:48:20,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 14:48:20,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 14:48:20,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 14:48:20,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 14:48:20,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 14:48:20,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:20" (1/1) ... [2021-03-24 14:48:20,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:20" (1/1) ... [2021-03-24 14:48:20,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 14:48:20,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 14:48:20,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 14:48:20,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 14:48:20,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:20" (1/1) ... [2021-03-24 14:48:20,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:20" (1/1) ... [2021-03-24 14:48:20,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:20" (1/1) ... [2021-03-24 14:48:20,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:20" (1/1) ... [2021-03-24 14:48:20,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:20" (1/1) ... [2021-03-24 14:48:20,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:20" (1/1) ... [2021-03-24 14:48:20,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:20" (1/1) ... [2021-03-24 14:48:20,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 14:48:20,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 14:48:20,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 14:48:20,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 14:48:20,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:20" (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 14:48:20,139 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 14:48:20,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 14:48:20,139 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 14:48:20,139 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 14:48:20,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 14:48:20,139 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 14:48:20,139 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 14:48:20,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 14:48:20,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 14:48:20,140 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-24 14:48:20,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-24 14:48:20,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-24 14:48:20,140 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 14:48:20,339 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 14:48:20,339 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 14:48:20,340 INFO L202 PluginConnector]: Adding new model node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 02:48:20 BoogieIcfgContainer [2021-03-24 14:48:20,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 14:48:20,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 14:48:20,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 14:48:20,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 14:48:20,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:20" (1/2) ... [2021-03-24 14:48:20,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f998e40 and model type node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 02:48:20, skipping insertion in model container [2021-03-24 14:48:20,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 02:48:20" (2/2) ... [2021-03-24 14:48:20,345 INFO L111 eAbstractionObserver]: Analyzing ICFG node-trans.wvr.bpl [2021-03-24 14:48:20,348 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 14:48:20,351 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 14:48:20,351 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 14:48:20,382 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-24 14:48:20,406 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-24 14:48:20,418 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 14:48:20,418 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 14:48:20,418 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 14:48:20,419 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 14:48:20,419 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 14:48:20,419 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 14:48:20,419 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 14:48:20,419 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 14:48:20,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-03-24 14:48:20,471 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-24 14:48:20,471 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 14:48:20,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 16 events. 0/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 14:48:20,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-03-24 14:48:20,475 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-03-24 14:48:20,475 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 14:48:20,481 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-24 14:48:20,483 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-24 14:48:20,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 14 transitions, 46 flow [2021-03-24 14:48:20,488 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-24 14:48:20,488 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 14:48:20,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 14 events. 0/14 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 14:48:20,489 INFO L142 LiptonReduction]: Number of co-enabled transitions 48 [2021-03-24 14:48:20,641 INFO L154 LiptonReduction]: Checked pairs total: 18 [2021-03-24 14:48:20,642 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 14:48:20,643 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 168 [2021-03-24 14:48:20,650 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-24 14:48:20,650 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 14:48:20,651 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:48:20,651 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:48:20,652 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:48:20,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:48:20,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1174649455, now seen corresponding path program 1 times [2021-03-24 14:48:20,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:48:20,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737797086] [2021-03-24 14:48:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:48:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:48:20,787 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:48:20,788 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:48:20,794 INFO L142 QuantifierPusher]: treesize reduction 19, result has 51.3 percent of original size [2021-03-24 14:48:20,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-03-24 14:48:20,806 INFO L142 QuantifierPusher]: treesize reduction 11, result has 67.6 percent of original size [2021-03-24 14:48:20,807 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 14:48:20,818 INFO L142 QuantifierPusher]: treesize reduction 26, result has 27.8 percent of original size [2021-03-24 14:48:20,818 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 14:48:20,827 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 14:48:20,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737797086] [2021-03-24 14:48:20,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:48:20,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:48:20,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470573208] [2021-03-24 14:48:20,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:48:20,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:48:20,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:48:20,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:48:20,843 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:48:20,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 10 transitions, 38 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 14:48:20,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:48:20,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:48:20,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:48:20,907 INFO L129 PetriNetUnfolder]: 3/27 cut-off events. [2021-03-24 14:48:20,907 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-03-24 14:48:20,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 27 events. 3/27 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 65 event pairs, 1 based on Foata normal form. 1/27 useless extension candidates. Maximal degree in co-relation 38. Up to 7 conditions per place. [2021-03-24 14:48:20,909 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 1/14 dead transitions. [2021-03-24 14:48:20,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 14 transitions, 62 flow [2021-03-24 14:48:20,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:48:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:48:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 14:48:20,916 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 14:48:20,916 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 14:48:20,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 14:48:20,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:48:20,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 14:48:20,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 14:48:20,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 14:48:20,923 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 14:48:20,924 INFO L185 Difference]: Start difference. First operand has 20 places, 10 transitions, 38 flow. Second operand 5 states and 79 transitions. [2021-03-24 14:48:20,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 14 transitions, 62 flow [2021-03-24 14:48:20,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 14 transitions, 50 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-24 14:48:20,927 INFO L241 Difference]: Finished difference. Result has 21 places, 11 transitions, 41 flow [2021-03-24 14:48:20,928 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=41, PETRI_PLACES=21, PETRI_TRANSITIONS=11} [2021-03-24 14:48:20,929 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2021-03-24 14:48:20,929 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 11 transitions, 41 flow [2021-03-24 14:48:20,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 14:48:20,929 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:48:20,929 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:48:20,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 14:48:20,929 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:48:20,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:48:20,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1445140561, now seen corresponding path program 2 times [2021-03-24 14:48:20,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:48:20,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901548371] [2021-03-24 14:48:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:48:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:48:20,974 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:48:20,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:48:20,976 INFO L142 QuantifierPusher]: treesize reduction 35, result has 60.7 percent of original size [2021-03-24 14:48:20,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-03-24 14:48:21,006 INFO L142 QuantifierPusher]: treesize reduction 13, result has 84.1 percent of original size [2021-03-24 14:48:21,007 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-03-24 14:48:21,040 INFO L142 QuantifierPusher]: treesize reduction 35, result has 30.0 percent of original size [2021-03-24 14:48:21,041 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 14:48:21,052 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 14:48:21,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901548371] [2021-03-24 14:48:21,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:48:21,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:48:21,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873981901] [2021-03-24 14:48:21,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:48:21,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:48:21,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:48:21,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:48:21,055 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:48:21,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 11 transitions, 41 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 14:48:21,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:48:21,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:48:21,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:48:21,183 INFO L129 PetriNetUnfolder]: 1/31 cut-off events. [2021-03-24 14:48:21,183 INFO L130 PetriNetUnfolder]: For 25/28 co-relation queries the response was YES. [2021-03-24 14:48:21,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 31 events. 1/31 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 102 event pairs, 1 based on Foata normal form. 1/30 useless extension candidates. Maximal degree in co-relation 59. Up to 8 conditions per place. [2021-03-24 14:48:21,184 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 3 changer transitions 1/15 dead transitions. [2021-03-24 14:48:21,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 15 transitions, 77 flow [2021-03-24 14:48:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:48:21,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:48:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 14:48:21,185 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 14:48:21,185 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 14:48:21,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 14:48:21,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:48:21,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 14:48:21,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 14:48:21,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 14:48:21,186 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 14:48:21,187 INFO L185 Difference]: Start difference. First operand has 21 places, 11 transitions, 41 flow. Second operand 5 states and 79 transitions. [2021-03-24 14:48:21,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 15 transitions, 77 flow [2021-03-24 14:48:21,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 70 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-24 14:48:21,188 INFO L241 Difference]: Finished difference. Result has 25 places, 12 transitions, 58 flow [2021-03-24 14:48:21,188 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=58, PETRI_PLACES=25, PETRI_TRANSITIONS=12} [2021-03-24 14:48:21,188 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2021-03-24 14:48:21,188 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 12 transitions, 58 flow [2021-03-24 14:48:21,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 14:48:21,188 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:48:21,188 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:48:21,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 14:48:21,189 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:48:21,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:48:21,189 INFO L82 PathProgramCache]: Analyzing trace with hash 328116283, now seen corresponding path program 3 times [2021-03-24 14:48:21,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:48:21,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75334998] [2021-03-24 14:48:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:48:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:48:21,228 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:48:21,228 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:48:21,231 INFO L142 QuantifierPusher]: treesize reduction 21, result has 81.3 percent of original size [2021-03-24 14:48:21,232 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-03-24 14:48:21,276 INFO L142 QuantifierPusher]: treesize reduction 8, result has 92.1 percent of original size [2021-03-24 14:48:21,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-03-24 14:48:21,331 INFO L142 QuantifierPusher]: treesize reduction 41, result has 26.8 percent of original size [2021-03-24 14:48:21,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 14:48:21,343 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 14:48:21,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75334998] [2021-03-24 14:48:21,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:48:21,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:48:21,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110313279] [2021-03-24 14:48:21,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:48:21,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:48:21,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:48:21,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:48:21,345 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:48:21,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 12 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 14:48:21,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:48:21,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:48:21,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:48:21,471 INFO L129 PetriNetUnfolder]: 1/28 cut-off events. [2021-03-24 14:48:21,472 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-03-24 14:48:21,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 28 events. 1/28 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 82 event pairs, 0 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 69. Up to 6 conditions per place. [2021-03-24 14:48:21,472 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 3 changer transitions 3/17 dead transitions. [2021-03-24 14:48:21,472 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 112 flow [2021-03-24 14:48:21,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:48:21,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:48:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 14:48:21,474 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 14:48:21,474 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 14:48:21,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 14:48:21,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:48:21,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 14:48:21,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 14:48:21,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 14:48:21,477 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 14:48:21,477 INFO L185 Difference]: Start difference. First operand has 25 places, 12 transitions, 58 flow. Second operand 5 states and 79 transitions. [2021-03-24 14:48:21,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 112 flow [2021-03-24 14:48:21,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 17 transitions, 102 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-24 14:48:21,482 INFO L241 Difference]: Finished difference. Result has 29 places, 12 transitions, 68 flow [2021-03-24 14:48:21,483 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=29, PETRI_TRANSITIONS=12} [2021-03-24 14:48:21,483 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2021-03-24 14:48:21,483 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 12 transitions, 68 flow [2021-03-24 14:48:21,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 14:48:21,484 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:48:21,484 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:48:21,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 14:48:21,484 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:48:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:48:21,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1202355085, now seen corresponding path program 4 times [2021-03-24 14:48:21,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:48:21,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743903920] [2021-03-24 14:48:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:48:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:48:21,555 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:48:21,555 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:48:21,559 INFO L142 QuantifierPusher]: treesize reduction 62, result has 54.7 percent of original size [2021-03-24 14:48:21,560 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-03-24 14:48:21,596 INFO L142 QuantifierPusher]: treesize reduction 40, result has 64.9 percent of original size [2021-03-24 14:48:21,598 INFO L147 QuantifierPusher]: treesize reduction 6, result has 91.9 percent of original size 68 [2021-03-24 14:48:21,651 INFO L142 QuantifierPusher]: treesize reduction 62, result has 22.5 percent of original size [2021-03-24 14:48:21,652 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-03-24 14:48:21,667 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 14:48:21,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743903920] [2021-03-24 14:48:21,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:48:21,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:48:21,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226963941] [2021-03-24 14:48:21,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:48:21,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:48:21,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:48:21,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:48:21,668 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:48:21,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 12 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 14:48:21,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:48:21,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:48:21,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:48:21,814 INFO L129 PetriNetUnfolder]: 0/26 cut-off events. [2021-03-24 14:48:21,815 INFO L130 PetriNetUnfolder]: For 70/76 co-relation queries the response was YES. [2021-03-24 14:48:21,815 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 26 events. 0/26 cut-off events. For 70/76 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 58 event pairs, 0 based on Foata normal form. 1/25 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-24 14:48:21,815 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 3/16 dead transitions. [2021-03-24 14:48:21,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 16 transitions, 122 flow [2021-03-24 14:48:21,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:48:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:48:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 14:48:21,819 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 14:48:21,819 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 14:48:21,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 14:48:21,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:48:21,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 14:48:21,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 14:48:21,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 14:48:21,822 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 14:48:21,823 INFO L185 Difference]: Start difference. First operand has 29 places, 12 transitions, 68 flow. Second operand 5 states and 79 transitions. [2021-03-24 14:48:21,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 16 transitions, 122 flow [2021-03-24 14:48:21,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 16 transitions, 104 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-03-24 14:48:21,825 INFO L241 Difference]: Finished difference. Result has 31 places, 12 transitions, 71 flow [2021-03-24 14:48:21,826 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=12} [2021-03-24 14:48:21,826 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2021-03-24 14:48:21,826 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 12 transitions, 71 flow [2021-03-24 14:48:21,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 14:48:21,828 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:48:21,829 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:48:21,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 14:48:21,830 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:48:21,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:48:21,834 INFO L82 PathProgramCache]: Analyzing trace with hash 343480555, now seen corresponding path program 5 times [2021-03-24 14:48:21,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:48:21,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109663319] [2021-03-24 14:48:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:48:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:48:21,914 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:48:21,914 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:48:21,916 INFO L142 QuantifierPusher]: treesize reduction 36, result has 60.0 percent of original size [2021-03-24 14:48:21,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-03-24 14:48:21,961 INFO L142 QuantifierPusher]: treesize reduction 66, result has 41.6 percent of original size [2021-03-24 14:48:21,965 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-03-24 14:48:21,984 INFO L142 QuantifierPusher]: treesize reduction 30, result has 37.5 percent of original size [2021-03-24 14:48:21,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-03-24 14:48:22,003 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 14:48:22,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109663319] [2021-03-24 14:48:22,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:48:22,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:48:22,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178663892] [2021-03-24 14:48:22,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:48:22,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:48:22,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:48:22,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:48:22,004 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:48:22,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 12 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 14:48:22,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:48:22,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:48:22,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:48:22,091 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-24 14:48:22,091 INFO L130 PetriNetUnfolder]: For 56/62 co-relation queries the response was YES. [2021-03-24 14:48:22,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 17 events. 0/17 cut-off events. For 56/62 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 19 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-24 14:48:22,092 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 3/13 dead transitions. [2021-03-24 14:48:22,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 13 transitions, 94 flow [2021-03-24 14:48:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:48:22,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:48:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-03-24 14:48:22,092 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2021-03-24 14:48:22,093 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-03-24 14:48:22,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-03-24 14:48:22,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:48:22,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-03-24 14:48:22,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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 14:48:22,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 14:48:22,094 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 14:48:22,094 INFO L185 Difference]: Start difference. First operand has 31 places, 12 transitions, 71 flow. Second operand 5 states and 77 transitions. [2021-03-24 14:48:22,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 13 transitions, 94 flow [2021-03-24 14:48:22,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 13 transitions, 79 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-03-24 14:48:22,095 INFO L241 Difference]: Finished difference. Result has 31 places, 10 transitions, 49 flow [2021-03-24 14:48:22,095 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=31, PETRI_TRANSITIONS=10} [2021-03-24 14:48:22,095 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2021-03-24 14:48:22,095 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 10 transitions, 49 flow [2021-03-24 14:48:22,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 14:48:22,095 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:48:22,095 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:48:22,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 14:48:22,095 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:48:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:48:22,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1416840285, now seen corresponding path program 6 times [2021-03-24 14:48:22,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:48:22,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243436375] [2021-03-24 14:48:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:48:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:48:22,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:48:22,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:48:22,170 INFO L142 QuantifierPusher]: treesize reduction 34, result has 64.6 percent of original size [2021-03-24 14:48:22,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-03-24 14:48:22,229 INFO L142 QuantifierPusher]: treesize reduction 35, result has 77.7 percent of original size [2021-03-24 14:48:22,236 INFO L147 QuantifierPusher]: treesize reduction 7, result has 94.3 percent of original size 115 [2021-03-24 14:48:22,304 INFO L142 QuantifierPusher]: treesize reduction 52, result has 37.3 percent of original size [2021-03-24 14:48:22,305 INFO L147 QuantifierPusher]: treesize reduction 5, result has 83.9 percent of original size 26 [2021-03-24 14:48:22,324 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 14:48:22,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243436375] [2021-03-24 14:48:22,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:48:22,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:48:22,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87762731] [2021-03-24 14:48:22,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:48:22,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:48:22,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:48:22,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:48:22,326 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:48:22,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 10 transitions, 49 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 14:48:22,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:48:22,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:48:22,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:48:22,434 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-24 14:48:22,434 INFO L130 PetriNetUnfolder]: For 25/27 co-relation queries the response was YES. [2021-03-24 14:48:22,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 10 events. 0/10 cut-off events. For 25/27 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 14:48:22,434 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-03-24 14:48:22,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 10 transitions, 60 flow [2021-03-24 14:48:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:48:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:48:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-03-24 14:48:22,435 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2021-03-24 14:48:22,435 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-03-24 14:48:22,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-03-24 14:48:22,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:48:22,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-03-24 14:48:22,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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 14:48:22,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 14:48:22,436 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 14:48:22,436 INFO L185 Difference]: Start difference. First operand has 31 places, 10 transitions, 49 flow. Second operand 5 states and 75 transitions. [2021-03-24 14:48:22,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 10 transitions, 60 flow [2021-03-24 14:48:22,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 10 transitions, 40 flow, removed 3 selfloop flow, removed 8 redundant places. [2021-03-24 14:48:22,436 INFO L241 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2021-03-24 14:48:22,436 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2021-03-24 14:48:22,436 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2021-03-24 14:48:22,436 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2021-03-24 14:48:22,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 14:48:22,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 14:48:22,439 INFO L202 PluginConnector]: Adding new model node-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 02:48:22 BasicIcfg [2021-03-24 14:48:22,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 14:48:22,440 INFO L168 Benchmark]: Toolchain (without parser) took 2385.12 ms. Allocated memory is still 316.7 MB. Free memory was 296.5 MB in the beginning and 248.7 MB in the end (delta: 47.8 MB). Peak memory consumption was 49.9 MB. Max. memory is 16.0 GB. [2021-03-24 14:48:22,440 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 316.7 MB. Free memory is still 297.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 14:48:22,440 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.77 ms. Allocated memory is still 316.7 MB. Free memory was 296.5 MB in the beginning and 295.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 14:48:22,441 INFO L168 Benchmark]: Boogie Preprocessor took 20.74 ms. Allocated memory is still 316.7 MB. Free memory was 295.0 MB in the beginning and 294.1 MB in the end (delta: 989.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 14:48:22,441 INFO L168 Benchmark]: RCFGBuilder took 243.95 ms. Allocated memory is still 316.7 MB. Free memory was 293.9 MB in the beginning and 279.0 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-24 14:48:22,441 INFO L168 Benchmark]: TraceAbstraction took 2097.93 ms. Allocated memory is still 316.7 MB. Free memory was 278.6 MB in the beginning and 248.7 MB in the end (delta: 29.9 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.0 GB. [2021-03-24 14:48:22,443 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 316.7 MB. Free memory is still 297.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.77 ms. Allocated memory is still 316.7 MB. Free memory was 296.5 MB in the beginning and 295.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.74 ms. Allocated memory is still 316.7 MB. Free memory was 295.0 MB in the beginning and 294.1 MB in the end (delta: 989.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 243.95 ms. Allocated memory is still 316.7 MB. Free memory was 293.9 MB in the beginning and 279.0 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2097.93 ms. Allocated memory is still 316.7 MB. Free memory was 278.6 MB in the beginning and 248.7 MB in the end (delta: 29.9 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 158.8ms, 24 PlacesBefore, 20 PlacesAfterwards, 14 TransitionsBefore, 10 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 18 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 15, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 15, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 18, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 15, unknown conditional: 0, unknown unconditional: 15] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 68]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2021.2ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 723.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 227.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 28 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1016.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=4, InterpolantAutomatonStates: 30, 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: 10.6ms SsaConstructionTime, 99.6ms SatisfiabilityAnalysisTime, 852.8ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1225 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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...