/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-RepeatedVariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 12:20:42,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 12:20:42,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 12:20:42,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-25 12:20:42,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-25 12:20:42,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-25 12:20:42,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-25 12:20:42,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-25 12:20:42,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-25 12:20:42,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-25 12:20:42,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-25 12:20:42,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-25 12:20:42,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-25 12:20:42,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-25 12:20:42,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-25 12:20:42,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-25 12:20:42,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-25 12:20:42,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-25 12:20:42,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-25 12:20:42,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-25 12:20:42,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-25 12:20:42,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-25 12:20:42,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-25 12:20:42,301 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-25 12:20:42,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-25 12:20:42,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-RepeatedVariableLbe.epf [2021-03-25 12:20:42,361 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 12:20:42,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 12:20:42,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 12:20:42,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 12:20:42,367 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 12:20:42,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 12:20:42,367 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 12:20:42,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 12:20:42,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 12:20:42,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 12:20:42,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 12:20:42,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 12:20:42,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 12:20:42,368 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 12:20:42,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 12:20:42,368 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 12:20:42,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 12:20:42,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 12:20:42,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 12:20:42,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 12:20:42,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 12:20:42,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 12:20:42,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 12:20:42,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 12:20:42,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 12:20:42,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 12:20:42,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 12:20:42,370 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-25 12:20:42,370 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 12:20:42,370 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 12:20:42,371 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 12:20:42,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 12:20:42,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 12:20:42,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 12:20:42,720 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 12:20:42,723 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 12:20:42,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl [2021-03-25 12:20:42,726 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl' [2021-03-25 12:20:42,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 12:20:42,755 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 12:20:42,759 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 12:20:42,759 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 12:20:42,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 12:20:42,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 12:20:42" (1/1) ... [2021-03-25 12:20:42,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 12:20:42" (1/1) ... [2021-03-25 12:20:42,788 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 12:20:42,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 12:20:42,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 12:20:42,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 12:20:42,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 12:20:42" (1/1) ... [2021-03-25 12:20:42,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 12:20:42" (1/1) ... [2021-03-25 12:20:42,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 12:20:42" (1/1) ... [2021-03-25 12:20:42,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 12:20:42" (1/1) ... [2021-03-25 12:20:42,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 12:20:42" (1/1) ... [2021-03-25 12:20:42,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 12:20:42" (1/1) ... [2021-03-25 12:20:42,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 12:20:42" (1/1) ... [2021-03-25 12:20:42,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 12:20:42,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 12:20:42,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 12:20:42,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 12:20:42,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 12:20:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 12:20:42,880 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-25 12:20:42,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-25 12:20:42,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-25 12:20:42,883 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-25 12:20:42,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-25 12:20:42,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-25 12:20:42,883 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-25 12:20:42,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 12:20:42,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 12:20:42,884 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 12:20:43,145 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 12:20:43,146 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-25 12:20:43,147 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 12:20:43 BoogieIcfgContainer [2021-03-25 12:20:43,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 12:20:43,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 12:20:43,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 12:20:43,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 12:20:43,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 12:20:42" (1/2) ... [2021-03-25 12:20:43,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df61d03 and model type easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 12:20:43, skipping insertion in model container [2021-03-25 12:20:43,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 12:20:43" (2/2) ... [2021-03-25 12:20:43,171 INFO L111 eAbstractionObserver]: Analyzing ICFG easy6.wvr.bpl [2021-03-25 12:20:43,177 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 12:20:43,181 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-25 12:20:43,182 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 12:20:43,253 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-25 12:20:43,270 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-25 12:20:43,290 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 12:20:43,291 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 12:20:43,291 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 12:20:43,291 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 12:20:43,291 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 12:20:43,291 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 12:20:43,291 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 12:20:43,291 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 12:20:43,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 42 places, 35 transitions, 86 flow [2021-03-25 12:20:43,331 INFO L129 PetriNetUnfolder]: 0/33 cut-off events. [2021-03-25 12:20:43,332 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 12:20:43,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 0/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 12:20:43,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 35 transitions, 86 flow [2021-03-25 12:20:43,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 31 transitions, 74 flow [2021-03-25 12:20:43,345 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 12:20:43,359 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 38 places, 31 transitions, 74 flow [2021-03-25 12:20:43,364 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 38 places, 31 transitions, 74 flow [2021-03-25 12:20:43,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 74 flow [2021-03-25 12:20:43,389 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-03-25 12:20:43,390 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 12:20:43,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 0/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 12:20:43,392 INFO L142 LiptonReduction]: Number of co-enabled transitions 240 [2021-03-25 12:20:43,513 INFO L154 LiptonReduction]: Checked pairs total: 1036 [2021-03-25 12:20:43,513 INFO L156 LiptonReduction]: Total number of compositions: 6 [2021-03-25 12:20:43,515 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 171 [2021-03-25 12:20:43,527 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-03-25 12:20:43,528 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 12:20:43,528 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 12:20:43,529 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 12:20:43,529 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 12:20:43,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 12:20:43,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1128452291, now seen corresponding path program 1 times [2021-03-25 12:20:43,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 12:20:43,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955200059] [2021-03-25 12:20:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 12:20:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 12:20:43,739 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:43,742 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:43,755 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:43,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:43,769 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:43,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:43,786 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:43,787 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:43,822 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-25 12:20:43,832 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 12:20:43,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955200059] [2021-03-25 12:20:43,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 12:20:43,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-25 12:20:43,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585970745] [2021-03-25 12:20:43,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 12:20:43,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 12:20:43,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 12:20:43,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-25 12:20:43,878 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 41 [2021-03-25 12:20:43,881 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:43,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 12:20:43,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 41 [2021-03-25 12:20:43,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 12:20:44,078 INFO L129 PetriNetUnfolder]: 1/49 cut-off events. [2021-03-25 12:20:44,078 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-03-25 12:20:44,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 49 events. 1/49 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 0 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 56. Up to 5 conditions per place. [2021-03-25 12:20:44,081 INFO L132 encePairwiseOnDemand]: 35/41 looper letters, 7 selfloop transitions, 7 changer transitions 2/35 dead transitions. [2021-03-25 12:20:44,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 114 flow [2021-03-25 12:20:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-25 12:20:44,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-25 12:20:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 265 transitions. [2021-03-25 12:20:44,100 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8079268292682927 [2021-03-25 12:20:44,101 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 265 transitions. [2021-03-25 12:20:44,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 265 transitions. [2021-03-25 12:20:44,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 12:20:44,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 265 transitions. [2021-03-25 12:20:44,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 33.125) internal successors, (265), 8 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:44,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 41.0) internal successors, (369), 9 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:44,126 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 41.0) internal successors, (369), 9 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:44,128 INFO L185 Difference]: Start difference. First operand has 32 places, 25 transitions, 62 flow. Second operand 8 states and 265 transitions. [2021-03-25 12:20:44,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 114 flow [2021-03-25 12:20:44,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 106 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-25 12:20:44,136 INFO L241 Difference]: Finished difference. Result has 38 places, 30 transitions, 92 flow [2021-03-25 12:20:44,138 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=92, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2021-03-25 12:20:44,139 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2021-03-25 12:20:44,140 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 12:20:44,140 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 38 places, 30 transitions, 92 flow [2021-03-25 12:20:44,140 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 38 places, 30 transitions, 92 flow [2021-03-25 12:20:44,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 30 transitions, 92 flow [2021-03-25 12:20:44,154 INFO L129 PetriNetUnfolder]: 0/42 cut-off events. [2021-03-25 12:20:44,154 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 12:20:44,154 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 42 events. 0/42 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 83 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-25 12:20:44,156 INFO L142 LiptonReduction]: Number of co-enabled transitions 194 [2021-03-25 12:20:44,269 INFO L154 LiptonReduction]: Checked pairs total: 576 [2021-03-25 12:20:44,269 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-25 12:20:44,269 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 129 [2021-03-25 12:20:44,271 INFO L480 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 95 flow [2021-03-25 12:20:44,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:44,272 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 12:20:44,272 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 12:20:44,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 12:20:44,274 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 12:20:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 12:20:44,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1588229989, now seen corresponding path program 2 times [2021-03-25 12:20:44,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 12:20:44,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330354149] [2021-03-25 12:20:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 12:20:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 12:20:44,355 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:44,356 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:44,366 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:44,367 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:44,376 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:44,378 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:44,387 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:44,389 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:44,403 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-25 12:20:44,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 12:20:44,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330354149] [2021-03-25 12:20:44,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 12:20:44,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-25 12:20:44,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178226142] [2021-03-25 12:20:44,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 12:20:44,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 12:20:44,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 12:20:44,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-25 12:20:44,426 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 45 [2021-03-25 12:20:44,427 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 95 flow. Second operand has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:44,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 12:20:44,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 45 [2021-03-25 12:20:44,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 12:20:44,547 INFO L129 PetriNetUnfolder]: 1/42 cut-off events. [2021-03-25 12:20:44,547 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-03-25 12:20:44,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 42 events. 1/42 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 90 event pairs, 0 based on Foata normal form. 1/43 useless extension candidates. Maximal degree in co-relation 76. Up to 7 conditions per place. [2021-03-25 12:20:44,548 INFO L132 encePairwiseOnDemand]: 37/45 looper letters, 4 selfloop transitions, 5 changer transitions 5/32 dead transitions. [2021-03-25 12:20:44,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 32 transitions, 138 flow [2021-03-25 12:20:44,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-25 12:20:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-25 12:20:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 294 transitions. [2021-03-25 12:20:44,551 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.725925925925926 [2021-03-25 12:20:44,551 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 294 transitions. [2021-03-25 12:20:44,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 294 transitions. [2021-03-25 12:20:44,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 12:20:44,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 294 transitions. [2021-03-25 12:20:44,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 32.666666666666664) internal successors, (294), 9 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:44,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:44,556 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:44,556 INFO L185 Difference]: Start difference. First operand has 35 places, 29 transitions, 95 flow. Second operand 9 states and 294 transitions. [2021-03-25 12:20:44,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 32 transitions, 138 flow [2021-03-25 12:20:44,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 32 transitions, 134 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-03-25 12:20:44,559 INFO L241 Difference]: Finished difference. Result has 43 places, 26 transitions, 90 flow [2021-03-25 12:20:44,559 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=26} [2021-03-25 12:20:44,560 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 11 predicate places. [2021-03-25 12:20:44,560 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 12:20:44,560 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 43 places, 26 transitions, 90 flow [2021-03-25 12:20:44,561 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 43 places, 26 transitions, 90 flow [2021-03-25 12:20:44,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 40 places, 26 transitions, 90 flow [2021-03-25 12:20:44,572 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-03-25 12:20:44,572 INFO L130 PetriNetUnfolder]: For 7/9 co-relation queries the response was YES. [2021-03-25 12:20:44,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 31 events. 0/31 cut-off events. For 7/9 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-25 12:20:44,573 INFO L142 LiptonReduction]: Number of co-enabled transitions 122 [2021-03-25 12:20:44,700 INFO L154 LiptonReduction]: Checked pairs total: 311 [2021-03-25 12:20:44,700 INFO L156 LiptonReduction]: Total number of compositions: 6 [2021-03-25 12:20:44,701 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 141 [2021-03-25 12:20:44,702 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 24 transitions, 86 flow [2021-03-25 12:20:44,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:44,702 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 12:20:44,702 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 12:20:44,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 12:20:44,702 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 12:20:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 12:20:44,703 INFO L82 PathProgramCache]: Analyzing trace with hash -491475537, now seen corresponding path program 1 times [2021-03-25 12:20:44,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 12:20:44,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137861870] [2021-03-25 12:20:44,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 12:20:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 12:20:44,740 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:44,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 12:20:44,744 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:44,744 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 12:20:44,749 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:44,750 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 12:20:44,761 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:44,761 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:44,780 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:44,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 12:20:44,790 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:44,790 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 12:20:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 12:20:44,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137861870] [2021-03-25 12:20:44,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 12:20:44,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-25 12:20:44,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056268760] [2021-03-25 12:20:44,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 12:20:44,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 12:20:44,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 12:20:44,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-25 12:20:44,797 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 51 [2021-03-25 12:20:44,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 24 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 31.285714285714285) internal successors, (219), 7 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:44,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 12:20:44,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 51 [2021-03-25 12:20:44,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 12:20:44,938 INFO L129 PetriNetUnfolder]: 22/122 cut-off events. [2021-03-25 12:20:44,938 INFO L130 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2021-03-25 12:20:44,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 122 events. 22/122 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 565 event pairs, 8 based on Foata normal form. 6/128 useless extension candidates. Maximal degree in co-relation 272. Up to 25 conditions per place. [2021-03-25 12:20:44,941 INFO L132 encePairwiseOnDemand]: 38/51 looper letters, 20 selfloop transitions, 16 changer transitions 6/53 dead transitions. [2021-03-25 12:20:44,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 287 flow [2021-03-25 12:20:44,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-25 12:20:44,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-25 12:20:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 314 transitions. [2021-03-25 12:20:44,943 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6840958605664488 [2021-03-25 12:20:44,943 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 314 transitions. [2021-03-25 12:20:44,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 314 transitions. [2021-03-25 12:20:44,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 12:20:44,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 314 transitions. [2021-03-25 12:20:44,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 34.888888888888886) internal successors, (314), 9 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:44,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:44,946 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:44,946 INFO L185 Difference]: Start difference. First operand has 38 places, 24 transitions, 86 flow. Second operand 9 states and 314 transitions. [2021-03-25 12:20:44,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 287 flow [2021-03-25 12:20:44,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 53 transitions, 225 flow, removed 8 selfloop flow, removed 9 redundant places. [2021-03-25 12:20:44,951 INFO L241 Difference]: Finished difference. Result has 41 places, 38 transitions, 177 flow [2021-03-25 12:20:44,951 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=177, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2021-03-25 12:20:44,951 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 9 predicate places. [2021-03-25 12:20:44,952 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 12:20:44,952 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 38 transitions, 177 flow [2021-03-25 12:20:44,952 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 38 transitions, 177 flow [2021-03-25 12:20:44,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 177 flow [2021-03-25 12:20:44,963 INFO L129 PetriNetUnfolder]: 3/72 cut-off events. [2021-03-25 12:20:44,964 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-03-25 12:20:44,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 72 events. 3/72 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 256 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 96. Up to 11 conditions per place. [2021-03-25 12:20:44,965 INFO L142 LiptonReduction]: Number of co-enabled transitions 122 [2021-03-25 12:20:45,002 INFO L154 LiptonReduction]: Checked pairs total: 350 [2021-03-25 12:20:45,002 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-25 12:20:45,002 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 50 [2021-03-25 12:20:45,007 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 181 flow [2021-03-25 12:20:45,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 31.285714285714285) internal successors, (219), 7 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,007 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 12:20:45,007 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 12:20:45,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-25 12:20:45,008 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 12:20:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 12:20:45,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1376577266, now seen corresponding path program 1 times [2021-03-25 12:20:45,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 12:20:45,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572127274] [2021-03-25 12:20:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 12:20:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 12:20:45,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 12:20:45,035 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,035 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 12:20:45,037 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,038 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 12:20:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 12:20:45,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572127274] [2021-03-25 12:20:45,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 12:20:45,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 12:20:45,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137503272] [2021-03-25 12:20:45,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-25 12:20:45,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 12:20:45,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-25 12:20:45,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-25 12:20:45,043 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 53 [2021-03-25 12:20:45,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 12:20:45,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 53 [2021-03-25 12:20:45,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 12:20:45,056 INFO L129 PetriNetUnfolder]: 1/57 cut-off events. [2021-03-25 12:20:45,056 INFO L130 PetriNetUnfolder]: For 11/12 co-relation queries the response was YES. [2021-03-25 12:20:45,056 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 57 events. 1/57 cut-off events. For 11/12 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 182 event pairs, 0 based on Foata normal form. 4/55 useless extension candidates. Maximal degree in co-relation 69. Up to 8 conditions per place. [2021-03-25 12:20:45,056 INFO L132 encePairwiseOnDemand]: 50/53 looper letters, 2 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2021-03-25 12:20:45,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 168 flow [2021-03-25 12:20:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-25 12:20:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-25 12:20:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2021-03-25 12:20:45,057 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8805031446540881 [2021-03-25 12:20:45,058 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2021-03-25 12:20:45,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2021-03-25 12:20:45,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 12:20:45,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2021-03-25 12:20:45,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,059 INFO L185 Difference]: Start difference. First operand has 39 places, 38 transitions, 181 flow. Second operand 3 states and 140 transitions. [2021-03-25 12:20:45,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 168 flow [2021-03-25 12:20:45,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 164 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-03-25 12:20:45,063 INFO L241 Difference]: Finished difference. Result has 41 places, 35 transitions, 164 flow [2021-03-25 12:20:45,063 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2021-03-25 12:20:45,063 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 9 predicate places. [2021-03-25 12:20:45,063 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 12:20:45,064 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 35 transitions, 164 flow [2021-03-25 12:20:45,064 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 35 transitions, 164 flow [2021-03-25 12:20:45,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 164 flow [2021-03-25 12:20:45,076 INFO L129 PetriNetUnfolder]: 1/57 cut-off events. [2021-03-25 12:20:45,076 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2021-03-25 12:20:45,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 57 events. 1/57 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 173 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 65. Up to 8 conditions per place. [2021-03-25 12:20:45,077 INFO L142 LiptonReduction]: Number of co-enabled transitions 108 [2021-03-25 12:20:45,264 INFO L154 LiptonReduction]: Checked pairs total: 292 [2021-03-25 12:20:45,264 INFO L156 LiptonReduction]: Total number of compositions: 8 [2021-03-25 12:20:45,264 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 201 [2021-03-25 12:20:45,265 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 175 flow [2021-03-25 12:20:45,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,265 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 12:20:45,265 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 12:20:45,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-25 12:20:45,265 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 12:20:45,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 12:20:45,266 INFO L82 PathProgramCache]: Analyzing trace with hash -564145201, now seen corresponding path program 1 times [2021-03-25 12:20:45,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 12:20:45,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614608165] [2021-03-25 12:20:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 12:20:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 12:20:45,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 12:20:45,305 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,306 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 12:20:45,311 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:45,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,320 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 12:20:45,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 12:20:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 12:20:45,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614608165] [2021-03-25 12:20:45,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 12:20:45,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-25 12:20:45,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853112090] [2021-03-25 12:20:45,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-25 12:20:45,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 12:20:45,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-25 12:20:45,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-25 12:20:45,335 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 61 [2021-03-25 12:20:45,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,335 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 12:20:45,335 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 61 [2021-03-25 12:20:45,335 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 12:20:45,473 INFO L129 PetriNetUnfolder]: 17/90 cut-off events. [2021-03-25 12:20:45,473 INFO L130 PetriNetUnfolder]: For 100/103 co-relation queries the response was YES. [2021-03-25 12:20:45,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 90 events. 17/90 cut-off events. For 100/103 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 380 event pairs, 5 based on Foata normal form. 5/75 useless extension candidates. Maximal degree in co-relation 226. Up to 22 conditions per place. [2021-03-25 12:20:45,474 INFO L132 encePairwiseOnDemand]: 48/61 looper letters, 17 selfloop transitions, 12 changer transitions 9/47 dead transitions. [2021-03-25 12:20:45,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 318 flow [2021-03-25 12:20:45,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-25 12:20:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-25 12:20:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 250 transitions. [2021-03-25 12:20:45,476 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.585480093676815 [2021-03-25 12:20:45,476 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 250 transitions. [2021-03-25 12:20:45,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 250 transitions. [2021-03-25 12:20:45,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 12:20:45,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 250 transitions. [2021-03-25 12:20:45,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 35.714285714285715) internal successors, (250), 7 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 61.0) internal successors, (488), 8 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,478 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 61.0) internal successors, (488), 8 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,479 INFO L185 Difference]: Start difference. First operand has 39 places, 33 transitions, 175 flow. Second operand 7 states and 250 transitions. [2021-03-25 12:20:45,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 318 flow [2021-03-25 12:20:45,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 298 flow, removed 5 selfloop flow, removed 2 redundant places. [2021-03-25 12:20:45,481 INFO L241 Difference]: Finished difference. Result has 46 places, 32 transitions, 197 flow [2021-03-25 12:20:45,481 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=197, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2021-03-25 12:20:45,481 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2021-03-25 12:20:45,481 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 12:20:45,481 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 46 places, 32 transitions, 197 flow [2021-03-25 12:20:45,481 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 46 places, 32 transitions, 197 flow [2021-03-25 12:20:45,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 32 transitions, 197 flow [2021-03-25 12:20:45,484 INFO L129 PetriNetUnfolder]: 4/52 cut-off events. [2021-03-25 12:20:45,485 INFO L130 PetriNetUnfolder]: For 63/68 co-relation queries the response was YES. [2021-03-25 12:20:45,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 52 events. 4/52 cut-off events. For 63/68 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 170 event pairs, 0 based on Foata normal form. 2/46 useless extension candidates. Maximal degree in co-relation 145. Up to 11 conditions per place. [2021-03-25 12:20:45,485 INFO L142 LiptonReduction]: Number of co-enabled transitions 48 [2021-03-25 12:20:45,640 INFO L154 LiptonReduction]: Checked pairs total: 161 [2021-03-25 12:20:45,640 INFO L156 LiptonReduction]: Total number of compositions: 6 [2021-03-25 12:20:45,640 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 159 [2021-03-25 12:20:45,640 INFO L480 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 202 flow [2021-03-25 12:20:45,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,641 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 12:20:45,641 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 12:20:45,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-25 12:20:45,641 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 12:20:45,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 12:20:45,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1888555468, now seen corresponding path program 1 times [2021-03-25 12:20:45,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 12:20:45,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044923296] [2021-03-25 12:20:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 12:20:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 12:20:45,653 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,654 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:45,659 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:45,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:45,672 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,672 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:45,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:45,688 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-03-25 12:20:45,689 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 12:20:45,699 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,699 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 12:20:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 12:20:45,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044923296] [2021-03-25 12:20:45,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 12:20:45,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-25 12:20:45,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833409333] [2021-03-25 12:20:45,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-25 12:20:45,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 12:20:45,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-25 12:20:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-25 12:20:45,701 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 67 [2021-03-25 12:20:45,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 202 flow. Second operand has 8 states, 8 states have (on average 31.125) internal successors, (249), 8 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 12:20:45,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 67 [2021-03-25 12:20:45,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 12:20:45,816 INFO L129 PetriNetUnfolder]: 10/75 cut-off events. [2021-03-25 12:20:45,817 INFO L130 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2021-03-25 12:20:45,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 75 events. 10/75 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 303 event pairs, 4 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 169. Up to 21 conditions per place. [2021-03-25 12:20:45,817 INFO L132 encePairwiseOnDemand]: 54/67 looper letters, 16 selfloop transitions, 12 changer transitions 3/38 dead transitions. [2021-03-25 12:20:45,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 38 transitions, 315 flow [2021-03-25 12:20:45,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-25 12:20:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-25 12:20:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 6 states and 209 transitions. [2021-03-25 12:20:45,819 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5199004975124378 [2021-03-25 12:20:45,819 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 209 transitions. [2021-03-25 12:20:45,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 209 transitions. [2021-03-25 12:20:45,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 12:20:45,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 209 transitions. [2021-03-25 12:20:45,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,821 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,821 INFO L185 Difference]: Start difference. First operand has 42 places, 30 transitions, 202 flow. Second operand 6 states and 209 transitions. [2021-03-25 12:20:45,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 38 transitions, 315 flow [2021-03-25 12:20:45,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 277 flow, removed 9 selfloop flow, removed 6 redundant places. [2021-03-25 12:20:45,824 INFO L241 Difference]: Finished difference. Result has 45 places, 32 transitions, 234 flow [2021-03-25 12:20:45,824 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2021-03-25 12:20:45,825 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2021-03-25 12:20:45,825 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 12:20:45,825 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 32 transitions, 234 flow [2021-03-25 12:20:45,825 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 32 transitions, 234 flow [2021-03-25 12:20:45,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 45 places, 32 transitions, 234 flow [2021-03-25 12:20:45,829 INFO L129 PetriNetUnfolder]: 2/57 cut-off events. [2021-03-25 12:20:45,829 INFO L130 PetriNetUnfolder]: For 97/101 co-relation queries the response was YES. [2021-03-25 12:20:45,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 57 events. 2/57 cut-off events. For 97/101 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 214 event pairs, 0 based on Foata normal form. 2/51 useless extension candidates. Maximal degree in co-relation 102. Up to 9 conditions per place. [2021-03-25 12:20:45,830 INFO L142 LiptonReduction]: Number of co-enabled transitions 40 [2021-03-25 12:20:45,872 INFO L154 LiptonReduction]: Checked pairs total: 129 [2021-03-25 12:20:45,873 INFO L156 LiptonReduction]: Total number of compositions: 1 [2021-03-25 12:20:45,873 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 48 [2021-03-25 12:20:45,873 INFO L480 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 230 flow [2021-03-25 12:20:45,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 31.125) internal successors, (249), 8 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,874 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 12:20:45,874 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 12:20:45,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-25 12:20:45,874 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 12:20:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 12:20:45,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1729840434, now seen corresponding path program 1 times [2021-03-25 12:20:45,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 12:20:45,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534287204] [2021-03-25 12:20:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 12:20:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 12:20:45,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:45,891 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:45,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:45,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:45,916 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-03-25 12:20:45,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 12:20:45,926 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:45,933 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 12:20:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 12:20:45,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534287204] [2021-03-25 12:20:45,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 12:20:45,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-25 12:20:45,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405115525] [2021-03-25 12:20:45,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 12:20:45,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 12:20:45,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 12:20:45,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-25 12:20:45,936 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 68 [2021-03-25 12:20:45,936 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 230 flow. Second operand has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:45,936 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 12:20:45,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 68 [2021-03-25 12:20:45,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 12:20:46,055 INFO L129 PetriNetUnfolder]: 4/55 cut-off events. [2021-03-25 12:20:46,055 INFO L130 PetriNetUnfolder]: For 161/161 co-relation queries the response was YES. [2021-03-25 12:20:46,055 INFO L84 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 55 events. 4/55 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 183 event pairs, 0 based on Foata normal form. 3/53 useless extension candidates. Maximal degree in co-relation 130. Up to 18 conditions per place. [2021-03-25 12:20:46,056 INFO L132 encePairwiseOnDemand]: 55/68 looper letters, 11 selfloop transitions, 13 changer transitions 3/34 dead transitions. [2021-03-25 12:20:46,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 34 transitions, 297 flow [2021-03-25 12:20:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-25 12:20:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-25 12:20:46,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 269 transitions. [2021-03-25 12:20:46,057 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.4944852941176471 [2021-03-25 12:20:46,057 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 269 transitions. [2021-03-25 12:20:46,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 269 transitions. [2021-03-25 12:20:46,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 12:20:46,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 269 transitions. [2021-03-25 12:20:46,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 33.625) internal successors, (269), 8 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 68.0) internal successors, (612), 9 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,060 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 68.0) internal successors, (612), 9 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,060 INFO L185 Difference]: Start difference. First operand has 44 places, 31 transitions, 230 flow. Second operand 8 states and 269 transitions. [2021-03-25 12:20:46,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 34 transitions, 297 flow [2021-03-25 12:20:46,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 34 transitions, 274 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-03-25 12:20:46,062 INFO L241 Difference]: Finished difference. Result has 49 places, 30 transitions, 230 flow [2021-03-25 12:20:46,063 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=230, PETRI_PLACES=49, PETRI_TRANSITIONS=30} [2021-03-25 12:20:46,063 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2021-03-25 12:20:46,063 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 12:20:46,063 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 30 transitions, 230 flow [2021-03-25 12:20:46,063 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 49 places, 30 transitions, 230 flow [2021-03-25 12:20:46,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 49 places, 30 transitions, 230 flow [2021-03-25 12:20:46,067 INFO L129 PetriNetUnfolder]: 2/47 cut-off events. [2021-03-25 12:20:46,067 INFO L130 PetriNetUnfolder]: For 104/108 co-relation queries the response was YES. [2021-03-25 12:20:46,067 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 47 events. 2/47 cut-off events. For 104/108 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 150 event pairs, 0 based on Foata normal form. 1/45 useless extension candidates. Maximal degree in co-relation 126. Up to 9 conditions per place. [2021-03-25 12:20:46,068 INFO L142 LiptonReduction]: Number of co-enabled transitions 28 [2021-03-25 12:20:46,126 INFO L154 LiptonReduction]: Checked pairs total: 107 [2021-03-25 12:20:46,127 INFO L156 LiptonReduction]: Total number of compositions: 1 [2021-03-25 12:20:46,127 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 64 [2021-03-25 12:20:46,127 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 29 transitions, 226 flow [2021-03-25 12:20:46,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,128 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 12:20:46,128 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 12:20:46,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-25 12:20:46,128 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 12:20:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 12:20:46,128 INFO L82 PathProgramCache]: Analyzing trace with hash 631632550, now seen corresponding path program 1 times [2021-03-25 12:20:46,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 12:20:46,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114138232] [2021-03-25 12:20:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 12:20:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 12:20:46,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 12:20:46,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 12:20:46,154 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 12:20:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 12:20:46,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114138232] [2021-03-25 12:20:46,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 12:20:46,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 12:20:46,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930081482] [2021-03-25 12:20:46,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-25 12:20:46,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 12:20:46,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-25 12:20:46,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-25 12:20:46,156 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 69 [2021-03-25 12:20:46,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 29 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 12:20:46,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 69 [2021-03-25 12:20:46,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 12:20:46,166 INFO L129 PetriNetUnfolder]: 0/33 cut-off events. [2021-03-25 12:20:46,166 INFO L130 PetriNetUnfolder]: For 48/49 co-relation queries the response was YES. [2021-03-25 12:20:46,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 33 events. 0/33 cut-off events. For 48/49 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 2/34 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-03-25 12:20:46,167 INFO L132 encePairwiseOnDemand]: 65/69 looper letters, 2 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2021-03-25 12:20:46,167 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 24 transitions, 185 flow [2021-03-25 12:20:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-25 12:20:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-25 12:20:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2021-03-25 12:20:46,173 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8985507246376812 [2021-03-25 12:20:46,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2021-03-25 12:20:46,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2021-03-25 12:20:46,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 12:20:46,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2021-03-25 12:20:46,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,175 INFO L185 Difference]: Start difference. First operand has 48 places, 29 transitions, 226 flow. Second operand 3 states and 186 transitions. [2021-03-25 12:20:46,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 24 transitions, 185 flow [2021-03-25 12:20:46,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 24 transitions, 136 flow, removed 8 selfloop flow, removed 11 redundant places. [2021-03-25 12:20:46,176 INFO L241 Difference]: Finished difference. Result has 40 places, 24 transitions, 137 flow [2021-03-25 12:20:46,176 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=40, PETRI_TRANSITIONS=24} [2021-03-25 12:20:46,177 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2021-03-25 12:20:46,177 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 12:20:46,177 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 40 places, 24 transitions, 137 flow [2021-03-25 12:20:46,177 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 40 places, 24 transitions, 137 flow [2021-03-25 12:20:46,177 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 40 places, 24 transitions, 137 flow [2021-03-25 12:20:46,179 INFO L129 PetriNetUnfolder]: 0/33 cut-off events. [2021-03-25 12:20:46,179 INFO L130 PetriNetUnfolder]: For 33/35 co-relation queries the response was YES. [2021-03-25 12:20:46,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 33 events. 0/33 cut-off events. For 33/35 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 65 event pairs, 0 based on Foata normal form. 1/32 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-25 12:20:46,180 INFO L142 LiptonReduction]: Number of co-enabled transitions 16 [2021-03-25 12:20:46,374 INFO L154 LiptonReduction]: Checked pairs total: 9 [2021-03-25 12:20:46,374 INFO L156 LiptonReduction]: Total number of compositions: 6 [2021-03-25 12:20:46,374 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 197 [2021-03-25 12:20:46,375 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 21 transitions, 134 flow [2021-03-25 12:20:46,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,375 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 12:20:46,375 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 12:20:46,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-25 12:20:46,375 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 12:20:46,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 12:20:46,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1505183481, now seen corresponding path program 1 times [2021-03-25 12:20:46,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 12:20:46,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795012531] [2021-03-25 12:20:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 12:20:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 12:20:46,386 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,387 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:46,391 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,392 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:46,397 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,397 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:46,404 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:46,411 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 12:20:46,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 12:20:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 12:20:46,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795012531] [2021-03-25 12:20:46,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 12:20:46,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-25 12:20:46,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624378382] [2021-03-25 12:20:46,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 12:20:46,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 12:20:46,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 12:20:46,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-25 12:20:46,422 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 75 [2021-03-25 12:20:46,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 21 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 12:20:46,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 75 [2021-03-25 12:20:46,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 12:20:46,515 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-03-25 12:20:46,515 INFO L130 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2021-03-25 12:20:46,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 25 events. 1/25 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 1/26 useless extension candidates. Maximal degree in co-relation 51. Up to 10 conditions per place. [2021-03-25 12:20:46,516 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 5 selfloop transitions, 5 changer transitions 6/21 dead transitions. [2021-03-25 12:20:46,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 21 transitions, 163 flow [2021-03-25 12:20:46,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-25 12:20:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-25 12:20:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2021-03-25 12:20:46,519 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.42833333333333334 [2021-03-25 12:20:46,519 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 257 transitions. [2021-03-25 12:20:46,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 257 transitions. [2021-03-25 12:20:46,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 12:20:46,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 257 transitions. [2021-03-25 12:20:46,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 32.125) internal successors, (257), 8 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 75.0) internal successors, (675), 9 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,521 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 75.0) internal successors, (675), 9 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,521 INFO L185 Difference]: Start difference. First operand has 37 places, 21 transitions, 134 flow. Second operand 8 states and 257 transitions. [2021-03-25 12:20:46,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 21 transitions, 163 flow [2021-03-25 12:20:46,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 21 transitions, 124 flow, removed 4 selfloop flow, removed 8 redundant places. [2021-03-25 12:20:46,522 INFO L241 Difference]: Finished difference. Result has 36 places, 15 transitions, 70 flow [2021-03-25 12:20:46,523 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=70, PETRI_PLACES=36, PETRI_TRANSITIONS=15} [2021-03-25 12:20:46,523 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2021-03-25 12:20:46,523 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 12:20:46,523 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 36 places, 15 transitions, 70 flow [2021-03-25 12:20:46,523 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 36 places, 15 transitions, 70 flow [2021-03-25 12:20:46,524 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 30 places, 15 transitions, 70 flow [2021-03-25 12:20:46,525 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-03-25 12:20:46,526 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 12:20:46,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 18 events. 0/18 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-25 12:20:46,526 INFO L142 LiptonReduction]: Number of co-enabled transitions 4 [2021-03-25 12:20:46,565 INFO L154 LiptonReduction]: Checked pairs total: 1 [2021-03-25 12:20:46,565 INFO L156 LiptonReduction]: Total number of compositions: 1 [2021-03-25 12:20:46,565 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 42 [2021-03-25 12:20:46,565 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 15 transitions, 75 flow [2021-03-25 12:20:46,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,566 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 12:20:46,566 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 12:20:46,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-25 12:20:46,566 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 12:20:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 12:20:46,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1509467738, now seen corresponding path program 1 times [2021-03-25 12:20:46,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 12:20:46,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462981826] [2021-03-25 12:20:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 12:20:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 12:20:46,580 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,580 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:46,584 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,585 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:46,590 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:46,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:46,604 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-03-25 12:20:46,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:46,614 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,614 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 12:20:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 12:20:46,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462981826] [2021-03-25 12:20:46,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 12:20:46,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-25 12:20:46,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637392436] [2021-03-25 12:20:46,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 12:20:46,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 12:20:46,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 12:20:46,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-25 12:20:46,616 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 76 [2021-03-25 12:20:46,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 15 transitions, 75 flow. Second operand has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 12:20:46,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 76 [2021-03-25 12:20:46,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 12:20:46,671 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-25 12:20:46,671 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-25 12:20:46,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 13 events. 0/13 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 2/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 12:20:46,672 INFO L132 encePairwiseOnDemand]: 67/76 looper letters, 1 selfloop transitions, 6 changer transitions 1/13 dead transitions. [2021-03-25 12:20:46,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 13 transitions, 77 flow [2021-03-25 12:20:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-25 12:20:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-25 12:20:46,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2021-03-25 12:20:46,674 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.41353383458646614 [2021-03-25 12:20:46,674 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 220 transitions. [2021-03-25 12:20:46,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 220 transitions. [2021-03-25 12:20:46,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 12:20:46,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 220 transitions. [2021-03-25 12:20:46,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 76.0) internal successors, (608), 8 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,677 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 76.0) internal successors, (608), 8 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,677 INFO L185 Difference]: Start difference. First operand has 30 places, 15 transitions, 75 flow. Second operand 7 states and 220 transitions. [2021-03-25 12:20:46,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 13 transitions, 77 flow [2021-03-25 12:20:46,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 13 transitions, 45 flow, removed 1 selfloop flow, removed 13 redundant places. [2021-03-25 12:20:46,677 INFO L241 Difference]: Finished difference. Result has 23 places, 12 transitions, 39 flow [2021-03-25 12:20:46,677 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=39, PETRI_PLACES=23, PETRI_TRANSITIONS=12} [2021-03-25 12:20:46,678 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, -9 predicate places. [2021-03-25 12:20:46,678 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 12:20:46,678 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 23 places, 12 transitions, 39 flow [2021-03-25 12:20:46,678 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 23 places, 12 transitions, 39 flow [2021-03-25 12:20:46,678 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 12 transitions, 39 flow [2021-03-25 12:20:46,679 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-25 12:20:46,679 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 12:20:46,679 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23 conditions, 12 events. 0/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 12:20:46,679 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 12:20:46,680 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 12:20:46,680 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 12:20:46,680 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2 [2021-03-25 12:20:46,680 INFO L480 AbstractCegarLoop]: Abstraction has has 20 places, 12 transitions, 39 flow [2021-03-25 12:20:46,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,681 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 12:20:46,681 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 12:20:46,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-25 12:20:46,681 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 12:20:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 12:20:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1063287931, now seen corresponding path program 1 times [2021-03-25 12:20:46,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 12:20:46,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857990401] [2021-03-25 12:20:46,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 12:20:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 12:20:46,695 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,695 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:46,700 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:46,705 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:46,712 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,712 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:46,719 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,719 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 12:20:46,726 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 12:20:46,727 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 12:20:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 12:20:46,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857990401] [2021-03-25 12:20:46,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 12:20:46,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-25 12:20:46,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891451601] [2021-03-25 12:20:46,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 12:20:46,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 12:20:46,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 12:20:46,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-25 12:20:46,728 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 76 [2021-03-25 12:20:46,729 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 12 transitions, 39 flow. Second operand has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 12:20:46,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 76 [2021-03-25 12:20:46,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 12:20:46,780 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-03-25 12:20:46,780 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 12:20:46,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 7 events. 0/7 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/8 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 12:20:46,786 INFO L132 encePairwiseOnDemand]: 70/76 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2021-03-25 12:20:46,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 7 transitions, 34 flow [2021-03-25 12:20:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-25 12:20:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-25 12:20:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2021-03-25 12:20:46,788 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.40601503759398494 [2021-03-25 12:20:46,788 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 216 transitions. [2021-03-25 12:20:46,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 216 transitions. [2021-03-25 12:20:46,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 12:20:46,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 216 transitions. [2021-03-25 12:20:46,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 30.857142857142858) internal successors, (216), 7 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 76.0) internal successors, (608), 8 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,792 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 76.0) internal successors, (608), 8 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,792 INFO L185 Difference]: Start difference. First operand has 20 places, 12 transitions, 39 flow. Second operand 7 states and 216 transitions. [2021-03-25 12:20:46,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 7 transitions, 34 flow [2021-03-25 12:20:46,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 7 transitions, 25 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-03-25 12:20:46,792 INFO L241 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2021-03-25 12:20:46,792 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=15, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2021-03-25 12:20:46,793 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, -17 predicate places. [2021-03-25 12:20:46,793 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 12:20:46,793 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 15 places, 0 transitions, 0 flow [2021-03-25 12:20:46,793 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 15 places, 0 transitions, 0 flow [2021-03-25 12:20:46,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-03-25 12:20:46,793 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-03-25 12:20:46,793 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 12:20:46,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 0 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs, 0 based on Foata normal form. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 0 conditions per place. [2021-03-25 12:20:46,793 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 12:20:46,794 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 12:20:46,794 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 12:20:46,794 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1 [2021-03-25 12:20:46,794 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-03-25 12:20:46,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 12:20:46,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-25 12:20:46,799 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 12:20:46 BasicIcfg [2021-03-25 12:20:46,799 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 12:20:46,801 INFO L168 Benchmark]: Toolchain (without parser) took 4044.33 ms. Allocated memory was 255.9 MB in the beginning and 364.9 MB in the end (delta: 109.1 MB). Free memory was 236.2 MB in the beginning and 346.8 MB in the end (delta: -110.6 MB). Peak memory consumption was 306.6 kB. Max. memory is 16.0 GB. [2021-03-25 12:20:46,801 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.77 ms. Allocated memory is still 255.9 MB. Free memory is still 237.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 12:20:46,801 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.85 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 12:20:46,803 INFO L168 Benchmark]: Boogie Preprocessor took 13.66 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 928.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 12:20:46,803 INFO L168 Benchmark]: RCFGBuilder took 343.60 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 236.0 MB in the end (delta: -2.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-03-25 12:20:46,803 INFO L168 Benchmark]: TraceAbstraction took 3650.10 ms. Allocated memory was 255.9 MB in the beginning and 364.9 MB in the end (delta: 109.1 MB). Free memory was 236.0 MB in the beginning and 346.8 MB in the end (delta: -110.8 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 12:20:46,805 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 0.77 ms. Allocated memory is still 255.9 MB. Free memory is still 237.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.85 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.66 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 928.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 343.60 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 236.0 MB in the end (delta: -2.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3650.10 ms. Allocated memory was 255.9 MB in the beginning and 364.9 MB in the end (delta: 109.1 MB). Free memory was 236.0 MB in the beginning and 346.8 MB in the end (delta: -110.8 MB). There was no memory consumed. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 149.8ms, 38 PlacesBefore, 32 PlacesAfterwards, 31 TransitionsBefore, 25 TransitionsAfterwards, 240 CoEnabledTransitionPairs, 3 FixpointIterations, 4 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 TotalNumberOfCompositions, 1036 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 514, positive: 416, positive conditional: 0, positive unconditional: 416, negative: 98, negative conditional: 0, negative unconditional: 98, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 101, positive: 85, positive conditional: 0, positive unconditional: 85, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 101, positive: 85, positive conditional: 0, positive unconditional: 85, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 514, positive: 331, positive conditional: 0, positive unconditional: 331, negative: 82, negative conditional: 0, negative unconditional: 82, unknown: 101, unknown conditional: 0, unknown unconditional: 101] , Statistics on independence cache: Total cache size (in pairs): 73, Positive cache size: 60, Positive conditional cache size: 0, Positive unconditional cache size: 60, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 128.8ms, 38 PlacesBefore, 35 PlacesAfterwards, 30 TransitionsBefore, 29 TransitionsAfterwards, 194 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 576 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 256, positive: 198, positive conditional: 0, positive unconditional: 198, negative: 58, negative conditional: 0, negative unconditional: 58, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 10, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 10, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 256, positive: 189, positive conditional: 0, positive unconditional: 189, negative: 57, negative conditional: 0, negative unconditional: 57, unknown: 10, unknown conditional: 0, unknown unconditional: 10] , Statistics on independence cache: Total cache size (in pairs): 81, Positive cache size: 70, Positive conditional cache size: 0, Positive unconditional cache size: 70, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 139.6ms, 43 PlacesBefore, 38 PlacesAfterwards, 26 TransitionsBefore, 24 TransitionsAfterwards, 122 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 2 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 TotalNumberOfCompositions, 311 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 186, positive: 145, positive conditional: 0, positive unconditional: 145, negative: 41, negative conditional: 0, negative unconditional: 41, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 4, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 186, positive: 142, positive conditional: 0, positive unconditional: 142, negative: 40, negative conditional: 0, negative unconditional: 40, unknown: 4, unknown conditional: 0, unknown unconditional: 4] , Statistics on independence cache: Total cache size (in pairs): 47, Positive cache size: 39, Positive conditional cache size: 0, Positive unconditional cache size: 39, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 49.9ms, 41 PlacesBefore, 39 PlacesAfterwards, 38 TransitionsBefore, 38 TransitionsAfterwards, 122 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 350 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 130, positive: 89, positive conditional: 0, positive unconditional: 89, negative: 41, negative conditional: 0, negative unconditional: 41, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 9, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 9, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 130, positive: 81, positive conditional: 0, positive unconditional: 81, negative: 40, negative conditional: 0, negative unconditional: 40, unknown: 9, unknown conditional: 0, unknown unconditional: 9] , Statistics on independence cache: Total cache size (in pairs): 53, Positive cache size: 46, Positive conditional cache size: 0, Positive unconditional cache size: 46, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 200.2ms, 41 PlacesBefore, 39 PlacesAfterwards, 35 TransitionsBefore, 33 TransitionsAfterwards, 108 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 7 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 1 ConcurrentYvCompositions, 0 ChoiceCompositions, 8 TotalNumberOfCompositions, 292 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 154, positive: 126, positive conditional: 0, positive unconditional: 126, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 13, positive: 13, positive conditional: 0, positive unconditional: 13, 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: 13, positive: 13, positive conditional: 0, positive unconditional: 13, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 154, positive: 113, positive conditional: 0, positive unconditional: 113, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 13, unknown conditional: 0, unknown unconditional: 13] , Statistics on independence cache: Total cache size (in pairs): 38, Positive cache size: 34, Positive conditional cache size: 0, Positive unconditional cache size: 34, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 158.5ms, 46 PlacesBefore, 42 PlacesAfterwards, 32 TransitionsBefore, 30 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 3 FixpointIterations, 1 TrivialSequentialCompositions, 5 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 TotalNumberOfCompositions, 161 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 105, positive: 75, positive conditional: 0, positive unconditional: 75, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 4, positive: 4, positive conditional: 0, positive unconditional: 4, 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: 4, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 105, positive: 71, positive conditional: 0, positive unconditional: 71, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 4, unknown conditional: 0, unknown unconditional: 4] , Statistics on independence cache: Total cache size (in pairs): 23, Positive cache size: 22, Positive conditional cache size: 0, Positive unconditional cache size: 22, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 47.8ms, 45 PlacesBefore, 44 PlacesAfterwards, 32 TransitionsBefore, 31 TransitionsAfterwards, 40 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 129 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 96, positive: 73, positive conditional: 0, positive unconditional: 73, negative: 23, negative conditional: 0, negative unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, 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: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 96, positive: 71, positive conditional: 0, positive unconditional: 71, negative: 23, negative conditional: 0, negative unconditional: 23, unknown: 2, unknown conditional: 0, unknown unconditional: 2] , Statistics on independence cache: Total cache size (in pairs): 22, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 63.6ms, 49 PlacesBefore, 48 PlacesAfterwards, 30 TransitionsBefore, 29 TransitionsAfterwards, 28 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 107 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 93, positive: 69, positive conditional: 0, positive unconditional: 69, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, 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: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 93, positive: 68, positive conditional: 0, positive unconditional: 68, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 197.0ms, 40 PlacesBefore, 37 PlacesAfterwards, 24 TransitionsBefore, 21 TransitionsAfterwards, 16 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 TotalNumberOfCompositions, 9 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9, positive: 9, positive conditional: 0, positive unconditional: 9, 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: 1, positive: 1, positive conditional: 0, positive unconditional: 1, 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: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , Statistics on independence cache: Total cache size (in pairs): 3, Positive cache size: 3, Positive conditional cache size: 0, Positive unconditional cache size: 3, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 41.4ms, 36 PlacesBefore, 30 PlacesAfterwards, 15 TransitionsBefore, 15 TransitionsAfterwards, 4 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 1 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, 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: 1, positive: 1, positive conditional: 0, positive unconditional: 1, 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: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , Statistics on independence cache: Total cache size (in pairs): 3, Positive cache size: 3, Positive conditional cache size: 0, Positive unconditional cache size: 3, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0ms, 23 PlacesBefore, 20 PlacesAfterwards, 12 TransitionsBefore, 12 TransitionsAfterwards, 0 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 3, Positive cache size: 3, Positive conditional cache size: 0, Positive unconditional cache size: 3, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.9ms, 15 PlacesBefore, 0 PlacesAfterwards, 0 TransitionsBefore, 0 TransitionsAfterwards, 0 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 3, Positive cache size: 3, Positive conditional cache size: 0, Positive unconditional cache size: 3, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 60]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3510.5ms, OverallIterations: 11, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1241.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 229.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 72 SDtfs, 151 SDslu, 47 SDs, 0 SdLazy, 421 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 333.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 709.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=234occurred in iteration=6, InterpolantAutomatonStates: 75, 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: 19.8ms SsaConstructionTime, 89.1ms SatisfiabilityAnalysisTime, 714.7ms InterpolantComputationTime, 195 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 836 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 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...