/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 15:50:24,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 15:50:24,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 15:50:24,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 15:50:24,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 15:50:24,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 15:50:24,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 15:50:24,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 15:50:24,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 15:50:24,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 15:50:24,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 15:50:24,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 15:50:24,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 15:50:24,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 15:50:24,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 15:50:24,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 15:50:24,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 15:50:24,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 15:50:24,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 15:50:24,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 15:50:24,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 15:50:24,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 15:50:24,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 15:50:24,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 15:50:24,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 15:50:24,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-10 15:50:24,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-10 15:50:24,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-10 15:50:24,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-10 15:50:24,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-10 15:50:24,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-10 15:50:24,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-10 15:50:24,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-10 15:50:24,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-10 15:50:24,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-10 15:50:24,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-10 15:50:24,533 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-06-10 15:50:24,576 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 15:50:24,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 15:50:24,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 15:50:24,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 15:50:24,580 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 15:50:24,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 15:50:24,580 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 15:50:24,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 15:50:24,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 15:50:24,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 15:50:24,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 15:50:24,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 15:50:24,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 15:50:24,581 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 15:50:24,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 15:50:24,582 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 15:50:24,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 15:50:24,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 15:50:24,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 15:50:24,582 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 15:50:24,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 15:50:24,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 15:50:24,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 15:50:24,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 15:50:24,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 15:50:24,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 15:50:24,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 15:50:24,583 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 15:50:24,583 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 15:50:24,583 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 15:50:24,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 15:50:24,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 15:50:24,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 15:50:24,933 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 15:50:24,934 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 15:50:24,935 INFO L432 ainManager$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 [2021-06-10 15:50:24,935 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-subst.wvr.bpl' [2021-06-10 15:50:24,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 15:50:24,970 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 15:50:24,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 15:50:24,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 15:50:24,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 15:50:24,983 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 10.06 03:50:24" (1/1) ... [2021-06-10 15:50:24,988 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 10.06 03:50:24" (1/1) ... [2021-06-10 15:50:24,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 15:50:24,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 15:50:24,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 15:50:24,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 15:50:25,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:50:24" (1/1) ... [2021-06-10 15:50:25,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:50:24" (1/1) ... [2021-06-10 15:50:25,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:50:24" (1/1) ... [2021-06-10 15:50:25,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:50:24" (1/1) ... [2021-06-10 15:50:25,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:50:24" (1/1) ... [2021-06-10 15:50:25,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:50:24" (1/1) ... [2021-06-10 15:50:25,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:50:24" (1/1) ... [2021-06-10 15:50:25,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 15:50:25,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 15:50:25,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 15:50:25,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 15:50:25,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:50:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 15:50:25,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-10 15:50:25,072 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-10 15:50:25,072 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-10 15:50:25,072 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-10 15:50:25,072 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-10 15:50:25,072 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-10 15:50:25,073 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 15:50:25,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 15:50:25,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 15:50:25,073 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-10 15:50:25,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-10 15:50:25,073 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-10 15:50:25,074 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 15:50:25,226 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 15:50:25,227 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 15:50:25,228 INFO L202 PluginConnector]: Adding new model match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 03:50:25 BoogieIcfgContainer [2021-06-10 15:50:25,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 15:50:25,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 15:50:25,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 15:50:25,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 15:50:25,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:50:24" (1/2) ... [2021-06-10 15:50:25,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ce6dec and model type match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 03:50:25, skipping insertion in model container [2021-06-10 15:50:25,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 03:50:25" (2/2) ... [2021-06-10 15:50:25,235 INFO L111 eAbstractionObserver]: Analyzing ICFG match-subst.wvr.bpl [2021-06-10 15:50:25,239 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 15:50:25,243 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 15:50:25,244 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 15:50:25,280 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-10 15:50:25,297 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-10 15:50:25,315 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 15:50:25,315 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 15:50:25,315 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 15:50:25,316 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 15:50:25,316 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 15:50:25,316 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 15:50:25,316 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 15:50:25,316 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 15:50:25,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-06-10 15:50:25,366 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-10 15:50:25,366 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-10 15:50:25,368 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. [2021-06-10 15:50:25,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-06-10 15:50:25,371 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-06-10 15:50:25,379 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-06-10 15:50:25,379 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-10 15:50:25,380 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:50:25,380 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:50:25,381 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:50:25,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:50:25,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1083414778, now seen corresponding path program 1 times [2021-06-10 15:50:25,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:50:25,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846775671] [2021-06-10 15:50:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:50:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:50:25,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:50:25,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:50:25,879 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 76 [2021-06-10 15:50:25,882 INFO L142 QuantifierPusher]: treesize reduction 37218, result has 0.8 percent of original size [2021-06-10 15:50:25,890 INFO L147 QuantifierPusher]: treesize reduction 17, result has 94.6 percent of original size 298 [2021-06-10 15:50:26,165 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 38 [2021-06-10 15:50:26,176 INFO L142 QuantifierPusher]: treesize reduction 345, result has 26.0 percent of original size [2021-06-10 15:50:26,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-06-10 15:50:26,308 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-06-10 15:50:26,314 INFO L142 QuantifierPusher]: treesize reduction 124, result has 29.1 percent of original size [2021-06-10 15:50:26,315 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-06-10 15:50:26,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:50:26,372 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:50:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:50:26,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846775671] [2021-06-10 15:50:26,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:50:26,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:50:26,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056635438] [2021-06-10 15:50:26,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:50:26,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:50:26,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:50:26,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:50:26,398 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:50:26,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 14 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:26,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:50:26,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:50:26,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:50:26,685 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-10 15:50:26,701 INFO L129 PetriNetUnfolder]: 3/40 cut-off events. [2021-06-10 15:50:26,701 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-06-10 15:50:26,703 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 40 events. 3/40 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 119 event pairs, 1 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 50. Up to 7 conditions per place. [2021-06-10 15:50:26,704 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 1/18 dead transitions. [2021-06-10 15:50:26,704 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 70 flow [2021-06-10 15:50:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:50:26,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:50:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-10 15:50:26,713 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-10 15:50:26,714 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-10 15:50:26,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-10 15:50:26,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:50:26,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-10 15:50:26,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:26,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:26,722 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:26,723 INFO L185 Difference]: Start difference. First operand has 24 places, 14 transitions, 46 flow. Second operand 5 states and 79 transitions. [2021-06-10 15:50:26,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 70 flow [2021-06-10 15:50:26,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 58 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-06-10 15:50:26,728 INFO L241 Difference]: Finished difference. Result has 25 places, 15 transitions, 49 flow [2021-06-10 15:50:26,730 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=25, PETRI_TRANSITIONS=15} [2021-06-10 15:50:26,731 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-06-10 15:50:26,731 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 49 flow [2021-06-10 15:50:26,731 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) [2021-06-10 15:50:26,731 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:50:26,731 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:50:26,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 15:50:26,732 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:50:26,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:50:26,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1676293040, now seen corresponding path program 2 times [2021-06-10 15:50:26,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:50:26,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358634152] [2021-06-10 15:50:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:50:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:50:26,792 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:50:26,793 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:50:26,812 INFO L142 QuantifierPusher]: treesize reduction 1719, result has 14.9 percent of original size [2021-06-10 15:50:26,816 INFO L147 QuantifierPusher]: treesize reduction 37, result has 87.7 percent of original size 265 [2021-06-10 15:50:26,927 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-06-10 15:50:26,930 INFO L142 QuantifierPusher]: treesize reduction 11, result has 91.7 percent of original size [2021-06-10 15:50:26,935 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-06-10 15:50:27,036 INFO L142 QuantifierPusher]: treesize reduction 3, result has 94.2 percent of original size [2021-06-10 15:50:27,037 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-06-10 15:50:27,079 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:50:27,080 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:50:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:50:27,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358634152] [2021-06-10 15:50:27,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:50:27,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:50:27,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431914477] [2021-06-10 15:50:27,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:50:27,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:50:27,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:50:27,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:50:27,089 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:50:27,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 15 transitions, 49 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:27,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:50:27,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:50:27,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:50:27,319 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-10 15:50:27,338 INFO L129 PetriNetUnfolder]: 2/42 cut-off events. [2021-06-10 15:50:27,338 INFO L130 PetriNetUnfolder]: For 24/26 co-relation queries the response was YES. [2021-06-10 15:50:27,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 42 events. 2/42 cut-off events. For 24/26 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 150 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 69. Up to 7 conditions per place. [2021-06-10 15:50:27,340 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 3/20 dead transitions. [2021-06-10 15:50:27,340 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 93 flow [2021-06-10 15:50:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:50:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:50:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-10 15:50:27,344 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-10 15:50:27,346 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-10 15:50:27,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-10 15:50:27,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:50:27,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-10 15:50:27,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:27,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:27,356 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:27,356 INFO L185 Difference]: Start difference. First operand has 25 places, 15 transitions, 49 flow. Second operand 5 states and 79 transitions. [2021-06-10 15:50:27,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 93 flow [2021-06-10 15:50:27,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 20 transitions, 86 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-06-10 15:50:27,358 INFO L241 Difference]: Finished difference. Result has 29 places, 15 transitions, 59 flow [2021-06-10 15:50:27,359 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=59, PETRI_PLACES=29, PETRI_TRANSITIONS=15} [2021-06-10 15:50:27,359 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-06-10 15:50:27,359 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 15 transitions, 59 flow [2021-06-10 15:50:27,360 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) [2021-06-10 15:50:27,360 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:50:27,360 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:50:27,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 15:50:27,360 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:50:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:50:27,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1282884404, now seen corresponding path program 3 times [2021-06-10 15:50:27,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:50:27,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29908272] [2021-06-10 15:50:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:50:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:50:27,447 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:50:27,448 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:50:27,463 INFO L142 QuantifierPusher]: treesize reduction 4247, result has 4.3 percent of original size [2021-06-10 15:50:27,466 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 191 [2021-06-10 15:50:27,591 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-06-10 15:50:27,595 INFO L142 QuantifierPusher]: treesize reduction 19, result has 84.0 percent of original size [2021-06-10 15:50:27,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-06-10 15:50:27,680 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:50:27,681 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-06-10 15:50:27,704 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:50:27,704 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:50:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:50:27,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29908272] [2021-06-10 15:50:27,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:50:27,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:50:27,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380549600] [2021-06-10 15:50:27,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:50:27,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:50:27,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:50:27,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:50:27,707 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:50:27,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 15 transitions, 59 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:27,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:50:27,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:50:27,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:50:27,925 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-10 15:50:27,938 INFO L129 PetriNetUnfolder]: 1/34 cut-off events. [2021-06-10 15:50:27,938 INFO L130 PetriNetUnfolder]: For 42/45 co-relation queries the response was YES. [2021-06-10 15:50:27,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 34 events. 1/34 cut-off events. For 42/45 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 94 event pairs, 1 based on Foata normal form. 1/34 useless extension candidates. Maximal degree in co-relation 65. Up to 5 conditions per place. [2021-06-10 15:50:27,939 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 1/19 dead transitions. [2021-06-10 15:50:27,939 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 19 transitions, 101 flow [2021-06-10 15:50:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:50:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:50:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-10 15:50:27,940 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-10 15:50:27,940 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-10 15:50:27,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-10 15:50:27,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:50:27,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-10 15:50:27,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:27,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:27,942 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:27,942 INFO L185 Difference]: Start difference. First operand has 29 places, 15 transitions, 59 flow. Second operand 5 states and 79 transitions. [2021-06-10 15:50:27,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 19 transitions, 101 flow [2021-06-10 15:50:27,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 82 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-06-10 15:50:27,944 INFO L241 Difference]: Finished difference. Result has 31 places, 16 transitions, 70 flow [2021-06-10 15:50:27,944 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=31, PETRI_TRANSITIONS=16} [2021-06-10 15:50:27,944 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 7 predicate places. [2021-06-10 15:50:27,944 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 16 transitions, 70 flow [2021-06-10 15:50:27,944 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) [2021-06-10 15:50:27,945 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:50:27,945 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:50:27,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 15:50:27,945 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:50:27,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:50:27,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1254072976, now seen corresponding path program 4 times [2021-06-10 15:50:27,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:50:27,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578395841] [2021-06-10 15:50:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:50:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:50:27,978 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:50:27,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:50:27,994 INFO L142 QuantifierPusher]: treesize reduction 5937, result has 3.1 percent of original size [2021-06-10 15:50:27,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 191 [2021-06-10 15:50:28,132 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-06-10 15:50:28,142 INFO L142 QuantifierPusher]: treesize reduction 3, result has 97.0 percent of original size [2021-06-10 15:50:28,144 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-06-10 15:50:28,250 INFO L142 QuantifierPusher]: treesize reduction 16, result has 70.4 percent of original size [2021-06-10 15:50:28,251 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-06-10 15:50:28,273 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:50:28,273 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:50:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:50:28,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578395841] [2021-06-10 15:50:28,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:50:28,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:50:28,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880932711] [2021-06-10 15:50:28,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:50:28,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:50:28,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:50:28,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:50:28,275 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:50:28,276 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 16 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:28,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:50:28,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:50:28,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:50:28,485 INFO L129 PetriNetUnfolder]: 1/28 cut-off events. [2021-06-10 15:50:28,485 INFO L130 PetriNetUnfolder]: For 41/46 co-relation queries the response was YES. [2021-06-10 15:50:28,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 28 events. 1/28 cut-off events. For 41/46 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 70 event pairs, 1 based on Foata normal form. 3/31 useless extension candidates. Maximal degree in co-relation 62. Up to 5 conditions per place. [2021-06-10 15:50:28,486 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 4/18 dead transitions. [2021-06-10 15:50:28,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 18 transitions, 100 flow [2021-06-10 15:50:28,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:50:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:50:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2021-06-10 15:50:28,488 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8210526315789474 [2021-06-10 15:50:28,488 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2021-06-10 15:50:28,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2021-06-10 15:50:28,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:50:28,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2021-06-10 15:50:28,489 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) [2021-06-10 15:50:28,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:28,490 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:28,490 INFO L185 Difference]: Start difference. First operand has 31 places, 16 transitions, 70 flow. Second operand 5 states and 78 transitions. [2021-06-10 15:50:28,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 18 transitions, 100 flow [2021-06-10 15:50:28,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 18 transitions, 96 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-06-10 15:50:28,492 INFO L241 Difference]: Finished difference. Result has 34 places, 14 transitions, 57 flow [2021-06-10 15:50:28,492 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=57, PETRI_PLACES=34, PETRI_TRANSITIONS=14} [2021-06-10 15:50:28,492 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 10 predicate places. [2021-06-10 15:50:28,493 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 14 transitions, 57 flow [2021-06-10 15:50:28,493 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) [2021-06-10 15:50:28,493 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:50:28,493 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:50:28,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-10 15:50:28,493 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:50:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:50:28,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1262486164, now seen corresponding path program 5 times [2021-06-10 15:50:28,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:50:28,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621606654] [2021-06-10 15:50:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:50:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:50:28,530 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:50:28,530 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:50:28,574 INFO L142 QuantifierPusher]: treesize reduction 19602, result has 1.1 percent of original size [2021-06-10 15:50:28,576 INFO L147 QuantifierPusher]: treesize reduction 8, result has 96.2 percent of original size 205 [2021-06-10 15:50:28,723 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-06-10 15:50:28,727 INFO L142 QuantifierPusher]: treesize reduction 83, result has 44.7 percent of original size [2021-06-10 15:50:28,728 INFO L147 QuantifierPusher]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-06-10 15:50:28,784 INFO L142 QuantifierPusher]: treesize reduction 20, result has 64.3 percent of original size [2021-06-10 15:50:28,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-06-10 15:50:28,804 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:50:28,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:50:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:50:28,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621606654] [2021-06-10 15:50:28,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:50:28,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:50:28,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715598291] [2021-06-10 15:50:28,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:50:28,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:50:28,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:50:28,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:50:28,807 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:50:28,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 14 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:28,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:50:28,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:50:28,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:50:28,999 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-10 15:50:29,007 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-06-10 15:50:29,007 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-10 15:50:29,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 23 events. 0/23 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 1/24 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-10 15:50:29,007 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 2/16 dead transitions. [2021-06-10 15:50:29,008 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 16 transitions, 90 flow [2021-06-10 15:50:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:50:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:50:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-06-10 15:50:29,009 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8105263157894737 [2021-06-10 15:50:29,009 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-06-10 15:50:29,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-06-10 15:50:29,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:50:29,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-06-10 15:50:29,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:29,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:29,010 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:29,010 INFO L185 Difference]: Start difference. First operand has 34 places, 14 transitions, 57 flow. Second operand 5 states and 77 transitions. [2021-06-10 15:50:29,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 16 transitions, 90 flow [2021-06-10 15:50:29,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 16 transitions, 60 flow, removed 6 selfloop flow, removed 9 redundant places. [2021-06-10 15:50:29,012 INFO L241 Difference]: Finished difference. Result has 29 places, 14 transitions, 47 flow [2021-06-10 15:50:29,012 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=14} [2021-06-10 15:50:29,012 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-06-10 15:50:29,012 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 14 transitions, 47 flow [2021-06-10 15:50:29,012 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) [2021-06-10 15:50:29,012 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:50:29,013 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:50:29,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-10 15:50:29,013 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:50:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:50:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash -523898520, now seen corresponding path program 6 times [2021-06-10 15:50:29,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:50:29,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812948646] [2021-06-10 15:50:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:50:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:50:29,044 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:50:29,044 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:50:29,056 INFO L142 QuantifierPusher]: treesize reduction 1808, result has 11.2 percent of original size [2021-06-10 15:50:29,058 INFO L147 QuantifierPusher]: treesize reduction 15, result has 93.4 percent of original size 213 [2021-06-10 15:50:29,156 INFO L142 QuantifierPusher]: treesize reduction 85, result has 44.8 percent of original size [2021-06-10 15:50:29,159 INFO L147 QuantifierPusher]: treesize reduction 5, result has 92.8 percent of original size 64 [2021-06-10 15:50:29,218 INFO L142 QuantifierPusher]: treesize reduction 3, result has 94.4 percent of original size [2021-06-10 15:50:29,233 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-06-10 15:50:29,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:50:29,280 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:50:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:50:29,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812948646] [2021-06-10 15:50:29,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:50:29,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:50:29,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066597844] [2021-06-10 15:50:29,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:50:29,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:50:29,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:50:29,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:50:29,282 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:50:29,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 14 transitions, 47 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:29,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:50:29,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:50:29,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:50:29,433 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-06-10 15:50:29,433 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-06-10 15:50:29,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 14 events. 0/14 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 15:50:29,433 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-06-10 15:50:29,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 13 transitions, 55 flow [2021-06-10 15:50:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:50:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:50:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-06-10 15:50:29,434 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2021-06-10 15:50:29,434 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-06-10 15:50:29,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-06-10 15:50:29,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:50:29,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-06-10 15:50:29,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:29,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:29,436 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:29,436 INFO L185 Difference]: Start difference. First operand has 29 places, 14 transitions, 47 flow. Second operand 5 states and 75 transitions. [2021-06-10 15:50:29,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 13 transitions, 55 flow [2021-06-10 15:50:29,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 13 transitions, 51 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-06-10 15:50:29,437 INFO L241 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2021-06-10 15:50:29,437 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2021-06-10 15:50:29,437 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2021-06-10 15:50:29,437 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2021-06-10 15:50:29,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:50:29,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-10 15:50:29,442 INFO L202 PluginConnector]: Adding new model match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 03:50:29 BasicIcfg [2021-06-10 15:50:29,442 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 15:50:29,443 INFO L168 Benchmark]: Toolchain (without parser) took 4472.07 ms. Allocated memory was 356.5 MB in the beginning and 469.8 MB in the end (delta: 113.2 MB). Free memory was 336.7 MB in the beginning and 412.4 MB in the end (delta: -75.6 MB). Peak memory consumption was 39.2 MB. Max. memory is 16.0 GB. [2021-06-10 15:50:29,443 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 356.5 MB. Free memory was 337.9 MB in the beginning and 337.8 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 15:50:29,443 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.02 ms. Allocated memory is still 356.5 MB. Free memory was 336.7 MB in the beginning and 335.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 15:50:29,444 INFO L168 Benchmark]: Boogie Preprocessor took 15.39 ms. Allocated memory is still 356.5 MB. Free memory was 335.2 MB in the beginning and 334.2 MB in the end (delta: 948.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 15:50:29,444 INFO L168 Benchmark]: RCFGBuilder took 214.60 ms. Allocated memory is still 356.5 MB. Free memory was 334.2 MB in the beginning and 323.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-10 15:50:29,445 INFO L168 Benchmark]: TraceAbstraction took 4212.34 ms. Allocated memory was 356.5 MB in the beginning and 469.8 MB in the end (delta: 113.2 MB). Free memory was 323.2 MB in the beginning and 412.4 MB in the end (delta: -89.2 MB). Peak memory consumption was 24.5 MB. Max. memory is 16.0 GB. [2021-06-10 15:50:29,447 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 356.5 MB. Free memory was 337.9 MB in the beginning and 337.8 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.02 ms. Allocated memory is still 356.5 MB. Free memory was 336.7 MB in the beginning and 335.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.39 ms. Allocated memory is still 356.5 MB. Free memory was 335.2 MB in the beginning and 334.2 MB in the end (delta: 948.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 214.60 ms. Allocated memory is still 356.5 MB. Free memory was 334.2 MB in the beginning and 323.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4212.34 ms. Allocated memory was 356.5 MB in the beginning and 469.8 MB in the end (delta: 113.2 MB). Free memory was 323.2 MB in the beginning and 412.4 MB in the end (delta: -89.2 MB). Peak memory consumption was 24.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 7.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 4126.7ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1428.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 55.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 92 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 106.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2720.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred 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: 9.3ms SsaConstructionTime, 104.7ms SatisfiabilityAnalysisTime, 2398.3ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 3019 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...