/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 23:49:10,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 23:49:10,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 23:49:10,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 23:49:10,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 23:49:10,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 23:49:10,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 23:49:10,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 23:49:10,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 23:49:10,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 23:49:10,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 23:49:10,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 23:49:10,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 23:49:10,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 23:49:10,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 23:49:10,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 23:49:10,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 23:49:10,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 23:49:10,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 23:49:10,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 23:49:10,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 23:49:10,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 23:49:10,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 23:49:10,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 23:49:10,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-11 23:49:10,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-11 23:49:10,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-11 23:49:10,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-11 23:49:10,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-11 23:49:10,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-11 23:49:10,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 23:49:10,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 23:49:10,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 23:49:10,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 23:49:10,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 23:49:10,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 23:49:10,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 23:49:10,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 23:49:10,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 23:49:10,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 23:49:10,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 23:49:10,509 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-SemanticLbe.epf [2021-03-11 23:49:10,524 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 23:49:10,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 23:49:10,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 23:49:10,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 23:49:10,525 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 23:49:10,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 23:49:10,526 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 23:49:10,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 23:49:10,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 23:49:10,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 23:49:10,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 23:49:10,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 23:49:10,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 23:49:10,527 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 23:49:10,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 23:49:10,527 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 23:49:10,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 23:49:10,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 23:49:10,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 23:49:10,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 23:49:10,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 23:49:10,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 23:49:10,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 23:49:10,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 23:49:10,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 23:49:10,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 23:49:10,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 23:49:10,529 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 23:49:10,529 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 23:49:10,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 23:49:10,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 23:49:10,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 23:49:10,786 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 23:49:10,787 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 23:49:10,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-subst.wvr.bpl [2021-03-11 23:49:10,788 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-subst.wvr.bpl' [2021-03-11 23:49:10,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 23:49:10,830 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 23:49:10,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 23:49:10,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 23:49:10,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 23:49:10,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:49:10" (1/1) ... [2021-03-11 23:49:10,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:49:10" (1/1) ... [2021-03-11 23:49:10,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 23:49:10,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 23:49:10,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 23:49:10,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 23:49:10,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:49:10" (1/1) ... [2021-03-11 23:49:10,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:49:10" (1/1) ... [2021-03-11 23:49:10,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:49:10" (1/1) ... [2021-03-11 23:49:10,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:49:10" (1/1) ... [2021-03-11 23:49:10,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:49:10" (1/1) ... [2021-03-11 23:49:10,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:49:10" (1/1) ... [2021-03-11 23:49:10,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:49:10" (1/1) ... [2021-03-11 23:49:10,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 23:49:10,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 23:49:10,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 23:49:10,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 23:49:10,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:49:10" (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 [2021-03-11 23:49:10,935 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 23:49:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 23:49:10,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 23:49:10,936 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 23:49:10,936 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 23:49:10,936 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 23:49:10,936 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 23:49:10,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 23:49:10,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 23:49:10,937 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 23:49:10,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 23:49:10,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 23:49:10,937 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 23:49:11,098 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 23:49:11,098 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 23:49:11,099 INFO L202 PluginConnector]: Adding new model match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 11:49:11 BoogieIcfgContainer [2021-03-11 23:49:11,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 23:49:11,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 23:49:11,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 23:49:11,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 23:49:11,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 11:49:10" (1/2) ... [2021-03-11 23:49:11,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4267def9 and model type match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 11:49:11, skipping insertion in model container [2021-03-11 23:49:11,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 11:49:11" (2/2) ... [2021-03-11 23:49:11,104 INFO L111 eAbstractionObserver]: Analyzing ICFG match-subst.wvr.bpl [2021-03-11 23:49:11,107 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 23:49:11,110 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 23:49:11,110 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 23:49:11,155 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 23:49:11,177 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 23:49:11,200 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 23:49:11,201 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 23:49:11,201 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 23:49:11,201 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 23:49:11,201 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 23:49:11,201 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 23:49:11,201 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 23:49:11,201 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 23:49:11,222 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-03-11 23:49:11,250 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 23:49:11,250 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 23:49:11,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 16 events. 0/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 23:49:11,253 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-03-11 23:49:11,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-03-11 23:49:11,258 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 23:49:11,266 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-11 23:49:11,272 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-11 23:49:11,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 14 transitions, 46 flow [2021-03-11 23:49:11,287 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-11 23:49:11,287 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 23:49:11,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 14 events. 0/14 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 23:49:11,289 INFO L116 LiptonReduction]: Number of co-enabled transitions 48 [2021-03-11 23:49:11,444 INFO L131 LiptonReduction]: Checked pairs total: 36 [2021-03-11 23:49:11,444 INFO L133 LiptonReduction]: Total number of compositions: 4 [2021-03-11 23:49:11,446 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 189 [2021-03-11 23:49:11,458 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-11 23:49:11,458 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 23:49:11,458 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 23:49:11,459 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 23:49:11,459 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 23:49:11,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 23:49:11,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1044063373, now seen corresponding path program 1 times [2021-03-11 23:49:11,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 23:49:11,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40749211] [2021-03-11 23:49:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 23:49:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 23:49:11,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 23:49:11,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 23:49:11,736 INFO L142 QuantifierPusher]: treesize reduction 1719, result has 14.9 percent of original size [2021-03-11 23:49:11,741 INFO L147 QuantifierPusher]: treesize reduction 37, result has 87.7 percent of original size 265 [2021-03-11 23:49:11,853 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-03-11 23:49:11,859 INFO L142 QuantifierPusher]: treesize reduction 11, result has 91.7 percent of original size [2021-03-11 23:49:11,860 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-03-11 23:49:11,929 INFO L142 QuantifierPusher]: treesize reduction 3, result has 94.2 percent of original size [2021-03-11 23:49:11,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-03-11 23:49:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 23:49:11,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40749211] [2021-03-11 23:49:11,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 23:49:11,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 23:49:11,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013006277] [2021-03-11 23:49:11,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 23:49:11,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 23:49:11,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 23:49:11,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 23:49:11,982 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 23:49:11,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 10 transitions, 38 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:11,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 23:49:11,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 23:49:11,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 23:49:12,210 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-03-11 23:49:12,211 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-03-11 23:49:12,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 29 events. 3/29 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 79 event pairs, 1 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 42. Up to 7 conditions per place. [2021-03-11 23:49:12,214 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 1/14 dead transitions. [2021-03-11 23:49:12,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 14 transitions, 62 flow [2021-03-11 23:49:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 23:49:12,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 23:49:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 23:49:12,222 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-11 23:49:12,223 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 23:49:12,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 23:49:12,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 23:49:12,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 23:49:12,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:12,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:12,232 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:12,233 INFO L185 Difference]: Start difference. First operand has 20 places, 10 transitions, 38 flow. Second operand 5 states and 79 transitions. [2021-03-11 23:49:12,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 14 transitions, 62 flow [2021-03-11 23:49:12,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 14 transitions, 50 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-11 23:49:12,236 INFO L241 Difference]: Finished difference. Result has 21 places, 11 transitions, 41 flow [2021-03-11 23:49:12,237 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=41, PETRI_PLACES=21, PETRI_TRANSITIONS=11} [2021-03-11 23:49:12,237 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2021-03-11 23:49:12,238 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 11 transitions, 41 flow [2021-03-11 23:49:12,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:12,238 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 23:49:12,238 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 23:49:12,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 23:49:12,238 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 23:49:12,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 23:49:12,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1975712739, now seen corresponding path program 2 times [2021-03-11 23:49:12,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 23:49:12,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840328989] [2021-03-11 23:49:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 23:49:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 23:49:12,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 23:49:12,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 23:49:12,368 INFO L142 QuantifierPusher]: treesize reduction 27828, result has 1.1 percent of original size [2021-03-11 23:49:12,371 INFO L147 QuantifierPusher]: treesize reduction 36, result has 88.6 percent of original size 281 [2021-03-11 23:49:12,497 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2021-03-11 23:49:12,504 INFO L142 QuantifierPusher]: treesize reduction 121, result has 46.2 percent of original size [2021-03-11 23:49:12,509 INFO L147 QuantifierPusher]: treesize reduction 7, result has 93.3 percent of original size 97 [2021-03-11 23:49:12,595 INFO L142 QuantifierPusher]: treesize reduction 102, result has 29.2 percent of original size [2021-03-11 23:49:12,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-03-11 23:49:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 23:49:12,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840328989] [2021-03-11 23:49:12,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 23:49:12,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 23:49:12,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149330116] [2021-03-11 23:49:12,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 23:49:12,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 23:49:12,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 23:49:12,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 23:49:12,637 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 23:49:12,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 11 transitions, 41 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:12,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 23:49:12,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 23:49:12,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 23:49:12,839 INFO L129 PetriNetUnfolder]: 2/29 cut-off events. [2021-03-11 23:49:12,839 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-03-11 23:49:12,839 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 29 events. 2/29 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 81 event pairs, 0 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 58. Up to 7 conditions per place. [2021-03-11 23:49:12,840 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 3/16 dead transitions. [2021-03-11 23:49:12,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 16 transitions, 85 flow [2021-03-11 23:49:12,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 23:49:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 23:49:12,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 23:49:12,843 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-11 23:49:12,843 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 23:49:12,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 23:49:12,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 23:49:12,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 23:49:12,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:12,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:12,845 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:12,845 INFO L185 Difference]: Start difference. First operand has 21 places, 11 transitions, 41 flow. Second operand 5 states and 79 transitions. [2021-03-11 23:49:12,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 16 transitions, 85 flow [2021-03-11 23:49:12,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 78 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-11 23:49:12,846 INFO L241 Difference]: Finished difference. Result has 25 places, 11 transitions, 51 flow [2021-03-11 23:49:12,846 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=51, PETRI_PLACES=25, PETRI_TRANSITIONS=11} [2021-03-11 23:49:12,847 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2021-03-11 23:49:12,847 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 11 transitions, 51 flow [2021-03-11 23:49:12,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:12,847 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 23:49:12,847 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 23:49:12,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 23:49:12,847 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 23:49:12,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 23:49:12,848 INFO L82 PathProgramCache]: Analyzing trace with hash -680399991, now seen corresponding path program 3 times [2021-03-11 23:49:12,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 23:49:12,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342395674] [2021-03-11 23:49:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 23:49:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 23:49:12,883 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 23:49:12,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 23:49:12,895 INFO L142 QuantifierPusher]: treesize reduction 5937, result has 3.1 percent of original size [2021-03-11 23:49:12,896 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 191 [2021-03-11 23:49:13,007 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-03-11 23:49:13,020 INFO L142 QuantifierPusher]: treesize reduction 20, result has 87.3 percent of original size [2021-03-11 23:49:13,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-03-11 23:49:13,174 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-11 23:49:13,178 INFO L142 QuantifierPusher]: treesize reduction 52, result has 40.9 percent of original size [2021-03-11 23:49:13,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-03-11 23:49:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 23:49:13,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342395674] [2021-03-11 23:49:13,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 23:49:13,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 23:49:13,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468095349] [2021-03-11 23:49:13,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 23:49:13,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 23:49:13,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 23:49:13,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 23:49:13,197 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 23:49:13,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 11 transitions, 51 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:13,197 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 23:49:13,197 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 23:49:13,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 23:49:13,391 INFO L129 PetriNetUnfolder]: 1/23 cut-off events. [2021-03-11 23:49:13,392 INFO L130 PetriNetUnfolder]: For 43/45 co-relation queries the response was YES. [2021-03-11 23:49:13,392 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 23 events. 1/23 cut-off events. For 43/45 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 51 event pairs, 1 based on Foata normal form. 1/24 useless extension candidates. Maximal degree in co-relation 56. Up to 5 conditions per place. [2021-03-11 23:49:13,392 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 3 changer transitions 1/15 dead transitions. [2021-03-11 23:49:13,392 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 15 transitions, 93 flow [2021-03-11 23:49:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 23:49:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 23:49:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 23:49:13,394 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-11 23:49:13,394 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 23:49:13,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 23:49:13,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 23:49:13,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 23:49:13,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:13,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:13,397 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:13,397 INFO L185 Difference]: Start difference. First operand has 25 places, 11 transitions, 51 flow. Second operand 5 states and 79 transitions. [2021-03-11 23:49:13,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 15 transitions, 93 flow [2021-03-11 23:49:13,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 15 transitions, 74 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-03-11 23:49:13,398 INFO L241 Difference]: Finished difference. Result has 27 places, 12 transitions, 62 flow [2021-03-11 23:49:13,398 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=12} [2021-03-11 23:49:13,398 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2021-03-11 23:49:13,398 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 12 transitions, 62 flow [2021-03-11 23:49:13,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:13,399 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 23:49:13,399 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 23:49:13,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 23:49:13,399 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 23:49:13,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 23:49:13,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1457698837, now seen corresponding path program 4 times [2021-03-11 23:49:13,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 23:49:13,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785947928] [2021-03-11 23:49:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 23:49:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 23:49:13,421 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 23:49:13,422 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 23:49:13,431 INFO L142 QuantifierPusher]: treesize reduction 4247, result has 4.3 percent of original size [2021-03-11 23:49:13,433 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 191 [2021-03-11 23:49:13,549 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-03-11 23:49:13,555 INFO L142 QuantifierPusher]: treesize reduction 21, result has 84.7 percent of original size [2021-03-11 23:49:13,556 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-03-11 23:49:13,622 INFO L142 QuantifierPusher]: treesize reduction 16, result has 70.4 percent of original size [2021-03-11 23:49:13,624 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-03-11 23:49:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 23:49:13,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785947928] [2021-03-11 23:49:13,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 23:49:13,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 23:49:13,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83437965] [2021-03-11 23:49:13,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 23:49:13,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 23:49:13,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 23:49:13,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 23:49:13,644 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 23:49:13,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 12 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:13,644 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 23:49:13,644 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 23:49:13,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 23:49:13,823 INFO L129 PetriNetUnfolder]: 1/20 cut-off events. [2021-03-11 23:49:13,823 INFO L130 PetriNetUnfolder]: For 34/37 co-relation queries the response was YES. [2021-03-11 23:49:13,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 20 events. 1/20 cut-off events. For 34/37 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 32 event pairs, 1 based on Foata normal form. 1/20 useless extension candidates. Maximal degree in co-relation 55. Up to 5 conditions per place. [2021-03-11 23:49:13,824 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 4/14 dead transitions. [2021-03-11 23:49:13,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 14 transitions, 92 flow [2021-03-11 23:49:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 23:49:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 23:49:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2021-03-11 23:49:13,825 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6782608695652174 [2021-03-11 23:49:13,825 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2021-03-11 23:49:13,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2021-03-11 23:49:13,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 23:49:13,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2021-03-11 23:49:13,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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) [2021-03-11 23:49:13,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:13,826 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:13,826 INFO L185 Difference]: Start difference. First operand has 27 places, 12 transitions, 62 flow. Second operand 5 states and 78 transitions. [2021-03-11 23:49:13,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 14 transitions, 92 flow [2021-03-11 23:49:13,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 14 transitions, 88 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-11 23:49:13,827 INFO L241 Difference]: Finished difference. Result has 30 places, 10 transitions, 49 flow [2021-03-11 23:49:13,828 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=30, PETRI_TRANSITIONS=10} [2021-03-11 23:49:13,828 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2021-03-11 23:49:13,828 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 10 transitions, 49 flow [2021-03-11 23:49:13,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:13,828 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 23:49:13,828 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 23:49:13,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 23:49:13,828 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 23:49:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 23:49:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1895277039, now seen corresponding path program 5 times [2021-03-11 23:49:13,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 23:49:13,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121343692] [2021-03-11 23:49:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 23:49:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 23:49:13,862 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 23:49:13,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 23:49:13,900 INFO L142 QuantifierPusher]: treesize reduction 23003, result has 1.0 percent of original size [2021-03-11 23:49:13,901 INFO L147 QuantifierPusher]: treesize reduction 31, result has 86.9 percent of original size 205 [2021-03-11 23:49:14,023 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2021-03-11 23:49:14,027 INFO L142 QuantifierPusher]: treesize reduction 75, result has 52.5 percent of original size [2021-03-11 23:49:14,027 INFO L147 QuantifierPusher]: treesize reduction 5, result has 94.0 percent of original size 78 [2021-03-11 23:49:14,079 INFO L142 QuantifierPusher]: treesize reduction 20, result has 64.3 percent of original size [2021-03-11 23:49:14,080 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-03-11 23:49:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 23:49:14,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121343692] [2021-03-11 23:49:14,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 23:49:14,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 23:49:14,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075520112] [2021-03-11 23:49:14,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 23:49:14,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 23:49:14,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 23:49:14,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 23:49:14,101 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 23:49:14,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 10 transitions, 49 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:14,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 23:49:14,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 23:49:14,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 23:49:14,272 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 23:49:14,272 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-11 23:49:14,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 16 events. 0/16 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 1/16 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-11 23:49:14,272 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 2/12 dead transitions. [2021-03-11 23:49:14,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 12 transitions, 80 flow [2021-03-11 23:49:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 23:49:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 23:49:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-03-11 23:49:14,273 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2021-03-11 23:49:14,273 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-03-11 23:49:14,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-03-11 23:49:14,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 23:49:14,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-03-11 23:49:14,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:14,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:14,274 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:14,274 INFO L185 Difference]: Start difference. First operand has 30 places, 10 transitions, 49 flow. Second operand 5 states and 77 transitions. [2021-03-11 23:49:14,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 12 transitions, 80 flow [2021-03-11 23:49:14,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 47 flow, removed 5 selfloop flow, removed 11 redundant places. [2021-03-11 23:49:14,275 INFO L241 Difference]: Finished difference. Result has 23 places, 10 transitions, 35 flow [2021-03-11 23:49:14,275 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=35, PETRI_PLACES=23, PETRI_TRANSITIONS=10} [2021-03-11 23:49:14,275 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2021-03-11 23:49:14,276 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 10 transitions, 35 flow [2021-03-11 23:49:14,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:14,276 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 23:49:14,276 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 23:49:14,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 23:49:14,276 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 23:49:14,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 23:49:14,276 INFO L82 PathProgramCache]: Analyzing trace with hash 177527979, now seen corresponding path program 6 times [2021-03-11 23:49:14,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 23:49:14,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781996734] [2021-03-11 23:49:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 23:49:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 23:49:14,297 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 23:49:14,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 23:49:14,308 INFO L142 QuantifierPusher]: treesize reduction 2967, result has 8.9 percent of original size [2021-03-11 23:49:14,310 INFO L147 QuantifierPusher]: treesize reduction 42, result has 85.5 percent of original size 248 [2021-03-11 23:49:14,392 INFO L142 QuantifierPusher]: treesize reduction 95, result has 36.7 percent of original size [2021-03-11 23:49:14,393 INFO L147 QuantifierPusher]: treesize reduction 6, result has 89.1 percent of original size 49 [2021-03-11 23:49:14,429 INFO L142 QuantifierPusher]: treesize reduction 20, result has 64.3 percent of original size [2021-03-11 23:49:14,429 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-03-11 23:49:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 23:49:14,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781996734] [2021-03-11 23:49:14,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 23:49:14,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 23:49:14,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839017540] [2021-03-11 23:49:14,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 23:49:14,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 23:49:14,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 23:49:14,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 23:49:14,448 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 23:49:14,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 10 transitions, 35 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:14,448 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 23:49:14,448 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 23:49:14,448 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 23:49:14,572 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-11 23:49:14,573 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-11 23:49:14,573 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 10 events. 0/10 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 23:49:14,573 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-03-11 23:49:14,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 10 transitions, 44 flow [2021-03-11 23:49:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 23:49:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 23:49:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-03-11 23:49:14,574 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2021-03-11 23:49:14,574 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-03-11 23:49:14,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-03-11 23:49:14,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 23:49:14,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-03-11 23:49:14,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:14,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:14,575 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:14,575 INFO L185 Difference]: Start difference. First operand has 23 places, 10 transitions, 35 flow. Second operand 5 states and 75 transitions. [2021-03-11 23:49:14,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 10 transitions, 44 flow [2021-03-11 23:49:14,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 10 transitions, 40 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-11 23:49:14,575 INFO L241 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2021-03-11 23:49:14,575 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2021-03-11 23:49:14,575 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2021-03-11 23:49:14,575 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2021-03-11 23:49:14,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 23:49:14,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 23:49:14,578 INFO L202 PluginConnector]: Adding new model match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 11:49:14 BasicIcfg [2021-03-11 23:49:14,578 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 23:49:14,579 INFO L168 Benchmark]: Toolchain (without parser) took 3751.74 ms. Allocated memory was 255.9 MB in the beginning and 499.1 MB in the end (delta: 243.3 MB). Free memory was 237.1 MB in the beginning and 288.2 MB in the end (delta: -51.2 MB). Peak memory consumption was 193.1 MB. Max. memory is 16.0 GB. [2021-03-11 23:49:14,579 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 238.2 MB in the beginning and 238.0 MB in the end (delta: 179.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 23:49:14,580 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.71 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 23:49:14,580 INFO L168 Benchmark]: Boogie Preprocessor took 19.16 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 23:49:14,580 INFO L168 Benchmark]: RCFGBuilder took 227.06 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 235.5 MB in the end (delta: -1.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-03-11 23:49:14,580 INFO L168 Benchmark]: TraceAbstraction took 3478.43 ms. Allocated memory was 255.9 MB in the beginning and 499.1 MB in the end (delta: 243.3 MB). Free memory was 234.9 MB in the beginning and 288.2 MB in the end (delta: -53.3 MB). Peak memory consumption was 189.5 MB. Max. memory is 16.0 GB. [2021-03-11 23:49:14,581 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 238.2 MB in the beginning and 238.0 MB in the end (delta: 179.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.71 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.16 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 227.06 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 235.5 MB in the end (delta: -1.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3478.43 ms. Allocated memory was 255.9 MB in the beginning and 499.1 MB in the end (delta: 243.3 MB). Free memory was 234.9 MB in the beginning and 288.2 MB in the end (delta: -53.3 MB). Peak memory consumption was 189.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 172.1ms, 24 PlacesBefore, 20 PlacesAfterwards, 14 TransitionsBefore, 10 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 36 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 36, positive: 36, positive conditional: 0, positive unconditional: 36, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 32, positive: 32, positive conditional: 0, positive unconditional: 32, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 32, positive: 32, positive conditional: 0, positive unconditional: 32, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.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] , SemanticIndependenceRelation.Query Time [ms]: [ 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: 36, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 32, unknown conditional: 0, unknown unconditional: 32] , Statistics on independence cache: Total cache size (in pairs): 12, Positive cache size: 12, Positive conditional cache size: 0, Positive unconditional cache size: 12, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3388.7ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1163.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 251.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 82.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2181.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=3, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 8.5ms SsaConstructionTime, 96.8ms SatisfiabilityAnalysisTime, 1757.9ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 2193 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...