/usr/bin/java -Xmx8000000000 -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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-13 09:15:14,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-13 09:15:14,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-13 09:15:14,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-13 09:15:14,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-13 09:15:14,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-13 09:15:14,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-13 09:15:14,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-13 09:15:14,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-13 09:15:14,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-13 09:15:14,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-13 09:15:14,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-13 09:15:14,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-13 09:15:14,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-13 09:15:14,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-13 09:15:14,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-13 09:15:14,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-13 09:15:14,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-13 09:15:14,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-13 09:15:14,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-13 09:15:14,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-13 09:15:14,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-13 09:15:14,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-13 09:15:14,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-13 09:15:14,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-13 09:15:14,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-13 09:15:14,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-13 09:15:14,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-13 09:15:14,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-13 09:15:14,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-13 09:15:14,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-13 09:15:14,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-13 09:15:14,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-13 09:15:14,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-13 09:15:14,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-13 09:15:14,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-13 09:15:14,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-13 09:15:14,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-13 09:15:14,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-13 09:15:14,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-13 09:15:14,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-13 09:15:14,144 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-NoLbe.epf [2021-06-13 09:15:14,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-13 09:15:14,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-13 09:15:14,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-13 09:15:14,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-13 09:15:14,182 INFO L138 SettingsManager]: * Use SBE=true [2021-06-13 09:15:14,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-13 09:15:14,182 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-13 09:15:14,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-13 09:15:14,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-13 09:15:14,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-13 09:15:14,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-13 09:15:14,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-13 09:15:14,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-13 09:15:14,184 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-13 09:15:14,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-13 09:15:14,185 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-13 09:15:14,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-13 09:15:14,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-13 09:15:14,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-13 09:15:14,185 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-13 09:15:14,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-13 09:15:14,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 09:15:14,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-13 09:15:14,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-13 09:15:14,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-13 09:15:14,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-13 09:15:14,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-13 09:15:14,187 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-13 09:15:14,187 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-13 09:15:14,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-13 09:15:14,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-13 09:15:14,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-13 09:15:14,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-13 09:15:14,509 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-13 09:15:14,510 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-13 09:15:14,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-trans.wvr.bpl [2021-06-13 09:15:14,511 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-trans.wvr.bpl' [2021-06-13 09:15:14,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-13 09:15:14,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-13 09:15:14,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-13 09:15:14,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-13 09:15:14,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-13 09:15:14,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:15:14" (1/1) ... [2021-06-13 09:15:14,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:15:14" (1/1) ... [2021-06-13 09:15:14,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-13 09:15:14,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-13 09:15:14,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-13 09:15:14,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-13 09:15:14,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:15:14" (1/1) ... [2021-06-13 09:15:14,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:15:14" (1/1) ... [2021-06-13 09:15:14,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:15:14" (1/1) ... [2021-06-13 09:15:14,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:15:14" (1/1) ... [2021-06-13 09:15:14,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:15:14" (1/1) ... [2021-06-13 09:15:14,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:15:14" (1/1) ... [2021-06-13 09:15:14,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:15:14" (1/1) ... [2021-06-13 09:15:14,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-13 09:15:14,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-13 09:15:14,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-13 09:15:14,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-13 09:15:14,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:15:14" (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 [2021-06-13 09:15:14,688 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-13 09:15:14,689 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-13 09:15:14,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-13 09:15:14,691 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-13 09:15:14,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-13 09:15:14,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-13 09:15:14,691 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-13 09:15:14,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-13 09:15:14,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-13 09:15:14,692 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-13 09:15:14,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-13 09:15:14,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-13 09:15:14,693 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-13 09:15:14,950 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-13 09:15:14,950 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-13 09:15:14,952 INFO L202 PluginConnector]: Adding new model collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 09:15:14 BoogieIcfgContainer [2021-06-13 09:15:14,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-13 09:15:14,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-13 09:15:14,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-13 09:15:14,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-13 09:15:14,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:15:14" (1/2) ... [2021-06-13 09:15:14,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a917637 and model type collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 09:15:14, skipping insertion in model container [2021-06-13 09:15:14,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 09:15:14" (2/2) ... [2021-06-13 09:15:14,958 INFO L111 eAbstractionObserver]: Analyzing ICFG collitem-trans.wvr.bpl [2021-06-13 09:15:14,978 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-13 09:15:14,979 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-13 09:15:14,979 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-13 09:15:15,054 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-13 09:15:15,072 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-13 09:15:15,107 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 09:15:15,108 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 09:15:15,108 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 09:15:15,108 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 09:15:15,108 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 09:15:15,108 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 09:15:15,108 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 09:15:15,108 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-13 09:15:15,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-06-13 09:15:15,159 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-13 09:15:15,160 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-13 09:15:15,165 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. [2021-06-13 09:15:15,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-06-13 09:15:15,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-06-13 09:15:15,187 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-06-13 09:15:15,187 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-13 09:15:15,188 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:15:15,189 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:15:15,189 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:15:15,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:15:15,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1529605242, now seen corresponding path program 1 times [2021-06-13 09:15:15,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:15:15,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728157670] [2021-06-13 09:15:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:15:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:15:15,660 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:15,661 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:15:16,101 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 153 [2021-06-13 09:15:16,104 INFO L142 QuantifierPusher]: treesize reduction 17867, result has 5.0 percent of original size [2021-06-13 09:15:16,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 944 [2021-06-13 09:15:16,632 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 50 [2021-06-13 09:15:16,677 INFO L142 QuantifierPusher]: treesize reduction 544, result has 43.6 percent of original size [2021-06-13 09:15:16,682 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 421 [2021-06-13 09:15:16,893 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 34 [2021-06-13 09:15:16,895 INFO L142 QuantifierPusher]: treesize reduction 5, result has 80.0 percent of original size [2021-06-13 09:15:16,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-06-13 09:15:16,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:16,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:15:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 09:15:16,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:15:16,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728157670] [2021-06-13 09:15:16,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728157670] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:15:16,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:15:16,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:15:16,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179369179] [2021-06-13 09:15:16,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:15:16,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:15:16,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:15:16,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:15:16,934 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:15:16,936 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 14 transitions, 46 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) [2021-06-13 09:15:16,936 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:15:16,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:15:16,937 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:15:17,142 INFO L129 PetriNetUnfolder]: 3/39 cut-off events. [2021-06-13 09:15:17,142 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-06-13 09:15:17,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 39 events. 3/39 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 117 event pairs, 1 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 48. Up to 7 conditions per place. [2021-06-13 09:15:17,145 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 1/18 dead transitions. [2021-06-13 09:15:17,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 70 flow [2021-06-13 09:15:17,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:15:17,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:15:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-13 09:15:17,155 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-13 09:15:17,156 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-13 09:15:17,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-13 09:15:17,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:15:17,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-13 09:15:17,160 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) [2021-06-13 09:15:17,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:15:17,164 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:15:17,165 INFO L185 Difference]: Start difference. First operand has 24 places, 14 transitions, 46 flow. Second operand 5 states and 79 transitions. [2021-06-13 09:15:17,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 70 flow [2021-06-13 09:15:17,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 58 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-06-13 09:15:17,169 INFO L241 Difference]: Finished difference. Result has 25 places, 15 transitions, 49 flow [2021-06-13 09:15:17,171 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=25, PETRI_TRANSITIONS=15} [2021-06-13 09:15:17,171 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-06-13 09:15:17,172 INFO L482 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 49 flow [2021-06-13 09:15:17,172 INFO L483 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) [2021-06-13 09:15:17,172 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:15:17,172 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:15:17,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-13 09:15:17,172 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:15:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:15:17,173 INFO L82 PathProgramCache]: Analyzing trace with hash 87231794, now seen corresponding path program 2 times [2021-06-13 09:15:17,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:15:17,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921329280] [2021-06-13 09:15:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:15:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:15:17,277 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:17,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:15:17,436 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 100 [2021-06-13 09:15:17,437 INFO L142 QuantifierPusher]: treesize reduction 18563, result has 2.0 percent of original size [2021-06-13 09:15:17,448 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 378 [2021-06-13 09:15:17,632 INFO L142 QuantifierPusher]: treesize reduction 14819, result has 3.4 percent of original size [2021-06-13 09:15:17,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 526 [2021-06-13 09:15:17,913 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 62 [2021-06-13 09:15:17,915 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:17,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-06-13 09:15:17,935 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:17,935 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:15:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 09:15:17,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:15:17,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921329280] [2021-06-13 09:15:17,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921329280] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:15:17,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:15:17,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:15:17,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70397960] [2021-06-13 09:15:17,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:15:17,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:15:17,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:15:17,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:15:17,939 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:15:17,940 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 15 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) [2021-06-13 09:15:17,940 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:15:17,940 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:15:17,940 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:15:18,134 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2021-06-13 09:15:18,332 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2021-06-13 09:15:18,354 INFO L129 PetriNetUnfolder]: 1/46 cut-off events. [2021-06-13 09:15:18,354 INFO L130 PetriNetUnfolder]: For 25/28 co-relation queries the response was YES. [2021-06-13 09:15:18,354 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 46 events. 1/46 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 174 event pairs, 1 based on Foata normal form. 1/45 useless extension candidates. Maximal degree in co-relation 71. Up to 8 conditions per place. [2021-06-13 09:15:18,355 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 1/19 dead transitions. [2021-06-13 09:15:18,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 19 transitions, 85 flow [2021-06-13 09:15:18,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:15:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:15:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-13 09:15:18,357 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-13 09:15:18,357 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-13 09:15:18,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-13 09:15:18,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:15:18,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-13 09:15:18,358 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) [2021-06-13 09:15:18,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:15:18,359 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:15:18,359 INFO L185 Difference]: Start difference. First operand has 25 places, 15 transitions, 49 flow. Second operand 5 states and 79 transitions. [2021-06-13 09:15:18,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 19 transitions, 85 flow [2021-06-13 09:15:18,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 19 transitions, 78 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-06-13 09:15:18,361 INFO L241 Difference]: Finished difference. Result has 29 places, 16 transitions, 66 flow [2021-06-13 09:15:18,361 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=66, PETRI_PLACES=29, PETRI_TRANSITIONS=16} [2021-06-13 09:15:18,361 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-06-13 09:15:18,362 INFO L482 AbstractCegarLoop]: Abstraction has has 29 places, 16 transitions, 66 flow [2021-06-13 09:15:18,362 INFO L483 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) [2021-06-13 09:15:18,362 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:15:18,362 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:15:18,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-13 09:15:18,362 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:15:18,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:15:18,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1505933562, now seen corresponding path program 3 times [2021-06-13 09:15:18,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:15:18,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455372782] [2021-06-13 09:15:18,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:15:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:15:18,529 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:18,530 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:15:18,572 INFO L142 QuantifierPusher]: treesize reduction 3605, result has 5.2 percent of original size [2021-06-13 09:15:18,576 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 198 [2021-06-13 09:15:18,707 INFO L142 QuantifierPusher]: treesize reduction 1889, result has 19.8 percent of original size [2021-06-13 09:15:18,715 INFO L147 QuantifierPusher]: treesize reduction 11, result has 97.6 percent of original size 455 [2021-06-13 09:15:18,925 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 48 [2021-06-13 09:15:18,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:18,943 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-06-13 09:15:18,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:18,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:15:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 09:15:18,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:15:18,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455372782] [2021-06-13 09:15:18,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455372782] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:15:18,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:15:18,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:15:18,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210263002] [2021-06-13 09:15:18,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:15:18,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:15:18,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:15:18,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:15:18,965 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:15:18,965 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 16 transitions, 66 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) [2021-06-13 09:15:18,965 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:15:18,965 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:15:18,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:15:19,207 INFO L129 PetriNetUnfolder]: 1/41 cut-off events. [2021-06-13 09:15:19,207 INFO L130 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2021-06-13 09:15:19,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 41 events. 1/41 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 146 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 80. Up to 6 conditions per place. [2021-06-13 09:15:19,208 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 3/21 dead transitions. [2021-06-13 09:15:19,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 21 transitions, 120 flow [2021-06-13 09:15:19,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:15:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:15:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-13 09:15:19,209 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-13 09:15:19,210 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-13 09:15:19,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-13 09:15:19,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:15:19,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-13 09:15:19,211 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) [2021-06-13 09:15:19,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:15:19,214 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:15:19,214 INFO L185 Difference]: Start difference. First operand has 29 places, 16 transitions, 66 flow. Second operand 5 states and 79 transitions. [2021-06-13 09:15:19,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 21 transitions, 120 flow [2021-06-13 09:15:19,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 21 transitions, 110 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-06-13 09:15:19,216 INFO L241 Difference]: Finished difference. Result has 33 places, 16 transitions, 76 flow [2021-06-13 09:15:19,216 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=16} [2021-06-13 09:15:19,217 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 9 predicate places. [2021-06-13 09:15:19,217 INFO L482 AbstractCegarLoop]: Abstraction has has 33 places, 16 transitions, 76 flow [2021-06-13 09:15:19,217 INFO L483 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) [2021-06-13 09:15:19,217 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:15:19,217 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:15:19,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-13 09:15:19,217 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:15:19,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:15:19,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1914605312, now seen corresponding path program 4 times [2021-06-13 09:15:19,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:15:19,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509073812] [2021-06-13 09:15:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:15:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:15:19,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:19,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:15:19,400 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 149 [2021-06-13 09:15:19,402 INFO L142 QuantifierPusher]: treesize reduction 21526, result has 3.6 percent of original size [2021-06-13 09:15:19,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 794 [2021-06-13 09:15:19,653 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 51 [2021-06-13 09:15:19,689 INFO L142 QuantifierPusher]: treesize reduction 474, result has 40.0 percent of original size [2021-06-13 09:15:19,691 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 316 [2021-06-13 09:15:19,835 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 40 [2021-06-13 09:15:19,836 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:19,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-06-13 09:15:19,853 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:19,854 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:15:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 09:15:19,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:15:19,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509073812] [2021-06-13 09:15:19,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509073812] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:15:19,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:15:19,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:15:19,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545190915] [2021-06-13 09:15:19,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:15:19,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:15:19,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:15:19,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:15:19,857 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:15:19,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 16 transitions, 76 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) [2021-06-13 09:15:19,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:15:19,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:15:19,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:15:20,074 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-06-13 09:15:20,075 INFO L130 PetriNetUnfolder]: For 70/76 co-relation queries the response was YES. [2021-06-13 09:15:20,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 38 events. 0/38 cut-off events. For 70/76 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 116 event pairs, 0 based on Foata normal form. 1/37 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-06-13 09:15:20,075 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 3/20 dead transitions. [2021-06-13 09:15:20,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 20 transitions, 130 flow [2021-06-13 09:15:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:15:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:15:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-13 09:15:20,076 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-13 09:15:20,076 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-13 09:15:20,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-13 09:15:20,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:15:20,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-13 09:15:20,077 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) [2021-06-13 09:15:20,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:15:20,078 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:15:20,078 INFO L185 Difference]: Start difference. First operand has 33 places, 16 transitions, 76 flow. Second operand 5 states and 79 transitions. [2021-06-13 09:15:20,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 20 transitions, 130 flow [2021-06-13 09:15:20,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 112 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-06-13 09:15:20,081 INFO L241 Difference]: Finished difference. Result has 35 places, 16 transitions, 79 flow [2021-06-13 09:15:20,081 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=79, PETRI_PLACES=35, PETRI_TRANSITIONS=16} [2021-06-13 09:15:20,081 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 11 predicate places. [2021-06-13 09:15:20,081 INFO L482 AbstractCegarLoop]: Abstraction has has 35 places, 16 transitions, 79 flow [2021-06-13 09:15:20,081 INFO L483 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) [2021-06-13 09:15:20,081 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:15:20,081 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:15:20,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-13 09:15:20,082 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:15:20,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:15:20,082 INFO L82 PathProgramCache]: Analyzing trace with hash 927377144, now seen corresponding path program 5 times [2021-06-13 09:15:20,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:15:20,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940232879] [2021-06-13 09:15:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:15:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:15:20,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:20,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:15:20,240 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 120 [2021-06-13 09:15:20,241 INFO L142 QuantifierPusher]: treesize reduction 7837, result has 8.6 percent of original size [2021-06-13 09:15:20,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 737 [2021-06-13 09:15:20,426 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2021-06-13 09:15:20,436 INFO L142 QuantifierPusher]: treesize reduction 952, result has 16.9 percent of original size [2021-06-13 09:15:20,437 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 193 [2021-06-13 09:15:20,511 INFO L142 QuantifierPusher]: treesize reduction 5, result has 81.5 percent of original size [2021-06-13 09:15:20,511 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-06-13 09:15:20,527 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:20,527 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:15:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 09:15:20,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:15:20,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940232879] [2021-06-13 09:15:20,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940232879] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:15:20,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:15:20,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:15:20,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921609876] [2021-06-13 09:15:20,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:15:20,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:15:20,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:15:20,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:15:20,530 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:15:20,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 16 transitions, 79 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) [2021-06-13 09:15:20,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:15:20,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:15:20,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:15:20,672 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-06-13 09:15:20,672 INFO L130 PetriNetUnfolder]: For 59/68 co-relation queries the response was YES. [2021-06-13 09:15:20,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 25 events. 0/25 cut-off events. For 59/68 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 43 event pairs, 0 based on Foata normal form. 2/26 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-13 09:15:20,673 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 3/17 dead transitions. [2021-06-13 09:15:20,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 17 transitions, 102 flow [2021-06-13 09:15:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:15:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:15:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-06-13 09:15:20,676 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8105263157894737 [2021-06-13 09:15:20,676 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-06-13 09:15:20,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-06-13 09:15:20,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:15:20,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-06-13 09:15:20,677 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) [2021-06-13 09:15:20,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:15:20,678 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:15:20,678 INFO L185 Difference]: Start difference. First operand has 35 places, 16 transitions, 79 flow. Second operand 5 states and 77 transitions. [2021-06-13 09:15:20,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 17 transitions, 102 flow [2021-06-13 09:15:20,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 17 transitions, 90 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-06-13 09:15:20,680 INFO L241 Difference]: Finished difference. Result has 36 places, 14 transitions, 59 flow [2021-06-13 09:15:20,680 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=59, PETRI_PLACES=36, PETRI_TRANSITIONS=14} [2021-06-13 09:15:20,680 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 12 predicate places. [2021-06-13 09:15:20,680 INFO L482 AbstractCegarLoop]: Abstraction has has 36 places, 14 transitions, 59 flow [2021-06-13 09:15:20,680 INFO L483 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) [2021-06-13 09:15:20,680 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:15:20,681 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:15:20,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-13 09:15:20,681 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:15:20,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:15:20,681 INFO L82 PathProgramCache]: Analyzing trace with hash 213185016, now seen corresponding path program 6 times [2021-06-13 09:15:20,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:15:20,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680282426] [2021-06-13 09:15:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:15:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:15:20,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:20,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:15:20,755 INFO L142 QuantifierPusher]: treesize reduction 1933, result has 17.2 percent of original size [2021-06-13 09:15:20,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 402 [2021-06-13 09:15:20,857 INFO L142 QuantifierPusher]: treesize reduction 144, result has 60.7 percent of original size [2021-06-13 09:15:20,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 222 [2021-06-13 09:15:20,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:20,918 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-06-13 09:15:20,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:15:20,932 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:15:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 09:15:20,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:15:20,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680282426] [2021-06-13 09:15:20,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680282426] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:15:20,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:15:20,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:15:20,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128784834] [2021-06-13 09:15:20,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:15:20,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:15:20,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:15:20,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:15:20,934 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:15:20,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 14 transitions, 59 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) [2021-06-13 09:15:20,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:15:20,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:15:20,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:15:21,069 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-06-13 09:15:21,070 INFO L130 PetriNetUnfolder]: For 25/27 co-relation queries the response was YES. [2021-06-13 09:15:21,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 14 events. 0/14 cut-off events. For 25/27 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-13 09:15:21,070 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-06-13 09:15:21,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 13 transitions, 69 flow [2021-06-13 09:15:21,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:15:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:15:21,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-06-13 09:15:21,071 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2021-06-13 09:15:21,071 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-06-13 09:15:21,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-06-13 09:15:21,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:15:21,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-06-13 09:15:21,072 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) [2021-06-13 09:15:21,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:15:21,072 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:15:21,073 INFO L185 Difference]: Start difference. First operand has 36 places, 14 transitions, 59 flow. Second operand 5 states and 75 transitions. [2021-06-13 09:15:21,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 13 transitions, 69 flow [2021-06-13 09:15:21,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 13 transitions, 51 flow, removed 3 selfloop flow, removed 7 redundant places. [2021-06-13 09:15:21,074 INFO L241 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2021-06-13 09:15:21,074 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, 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=5, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2021-06-13 09:15:21,074 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2021-06-13 09:15:21,074 INFO L482 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2021-06-13 09:15:21,074 INFO L483 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) [2021-06-13 09:15:21,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-13 09:15:21,076 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-13 09:15:21,079 INFO L202 PluginConnector]: Adding new model collitem-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.06 09:15:21 BasicIcfg [2021-06-13 09:15:21,079 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-13 09:15:21,080 INFO L168 Benchmark]: Toolchain (without parser) took 6524.04 ms. Allocated memory was 227.5 MB in the beginning and 337.6 MB in the end (delta: 110.1 MB). Free memory was 206.9 MB in the beginning and 310.6 MB in the end (delta: -103.7 MB). Peak memory consumption was 195.0 MB. Max. memory is 8.0 GB. [2021-06-13 09:15:21,080 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 227.5 MB. Free memory is still 207.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 09:15:21,081 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.87 ms. Allocated memory is still 227.5 MB. Free memory was 206.7 MB in the beginning and 205.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 09:15:21,081 INFO L168 Benchmark]: Boogie Preprocessor took 17.51 ms. Allocated memory is still 227.5 MB. Free memory was 205.3 MB in the beginning and 204.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-13 09:15:21,081 INFO L168 Benchmark]: RCFGBuilder took 351.42 ms. Allocated memory is still 227.5 MB. Free memory was 204.3 MB in the beginning and 187.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-06-13 09:15:21,082 INFO L168 Benchmark]: TraceAbstraction took 6125.75 ms. Allocated memory was 227.5 MB in the beginning and 337.6 MB in the end (delta: 110.1 MB). Free memory was 186.8 MB in the beginning and 310.6 MB in the end (delta: -123.9 MB). Peak memory consumption was 175.1 MB. Max. memory is 8.0 GB. [2021-06-13 09:15:21,084 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 227.5 MB. Free memory is still 207.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.87 ms. Allocated memory is still 227.5 MB. Free memory was 206.7 MB in the beginning and 205.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.51 ms. Allocated memory is still 227.5 MB. Free memory was 205.3 MB in the beginning and 204.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 351.42 ms. Allocated memory is still 227.5 MB. Free memory was 204.3 MB in the beginning and 187.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6125.75 ms. Allocated memory was 227.5 MB in the beginning and 337.6 MB in the end (delta: 110.1 MB). Free memory was 186.8 MB in the beginning and 310.6 MB in the end (delta: -123.9 MB). Peak memory consumption was 175.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 68]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 18.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 5971.2ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1433.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 60.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 17 SDtfs, 28 SDslu, 0 SDs, 0 SdLazy, 96 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 120.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3338.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred 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: 10.8ms SsaConstructionTime, 224.7ms SatisfiabilityAnalysisTime, 4086.0ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 2095 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...