/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy7.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-13 11:30:25,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-13 11:30:25,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-13 11:30:25,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-13 11:30:25,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-13 11:30:25,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-13 11:30:25,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-13 11:30:25,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-13 11:30:25,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-13 11:30:25,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-13 11:30:25,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-13 11:30:25,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-13 11:30:25,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-13 11:30:25,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-13 11:30:25,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-13 11:30:25,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-13 11:30:25,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-13 11:30:25,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-13 11:30:25,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-13 11:30:25,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-13 11:30:25,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-13 11:30:25,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-13 11:30:25,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-13 11:30:25,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-13 11:30:25,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-13 11:30:25,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-13 11:30:25,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-13 11:30:25,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-13 11:30:25,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-13 11:30:25,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-13 11:30:25,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-13 11:30:25,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-13 11:30:25,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-13 11:30:25,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-13 11:30:25,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-13 11:30:25,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-13 11:30:25,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-13 11:30:25,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-13 11:30:25,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-13 11:30:25,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-13 11:30:25,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-13 11:30:25,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-06-13 11:30:25,328 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-13 11:30:25,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-13 11:30:25,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-13 11:30:25,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-13 11:30:25,331 INFO L138 SettingsManager]: * Use SBE=true [2021-06-13 11:30:25,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-13 11:30:25,331 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-13 11:30:25,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-13 11:30:25,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-13 11:30:25,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-13 11:30:25,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-13 11:30:25,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-13 11:30:25,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-13 11:30:25,333 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-13 11:30:25,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-13 11:30:25,333 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-13 11:30:25,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-13 11:30:25,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-13 11:30:25,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-13 11:30:25,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-13 11:30:25,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-13 11:30:25,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 11:30:25,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-13 11:30:25,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-13 11:30:25,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-13 11:30:25,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-13 11:30:25,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-13 11:30:25,335 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-13 11:30:25,335 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-13 11:30:25,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-13 11:30:25,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-13 11:30:25,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-13 11:30:25,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-13 11:30:25,674 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-13 11:30:25,675 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-13 11:30:25,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy7.wvr.bpl [2021-06-13 11:30:25,676 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy7.wvr.bpl' [2021-06-13 11:30:25,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-13 11:30:25,786 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-13 11:30:25,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-13 11:30:25,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-13 11:30:25,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-13 11:30:25,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:25" (1/1) ... [2021-06-13 11:30:25,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:25" (1/1) ... [2021-06-13 11:30:25,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-13 11:30:25,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-13 11:30:25,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-13 11:30:25,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-13 11:30:25,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:25" (1/1) ... [2021-06-13 11:30:25,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:25" (1/1) ... [2021-06-13 11:30:25,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:25" (1/1) ... [2021-06-13 11:30:25,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:25" (1/1) ... [2021-06-13 11:30:25,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:25" (1/1) ... [2021-06-13 11:30:25,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:25" (1/1) ... [2021-06-13 11:30:25,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:25" (1/1) ... [2021-06-13 11:30:25,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-13 11:30:25,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-13 11:30:25,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-13 11:30:25,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-13 11:30:25,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 11:30:25,882 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-13 11:30:25,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-13 11:30:25,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-13 11:30:25,883 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-13 11:30:25,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-13 11:30:25,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-13 11:30:25,883 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-13 11:30:25,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-13 11:30:25,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-13 11:30:25,884 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-13 11:30:26,006 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-13 11:30:26,006 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-13 11:30:26,007 INFO L202 PluginConnector]: Adding new model easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 11:30:26 BoogieIcfgContainer [2021-06-13 11:30:26,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-13 11:30:26,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-13 11:30:26,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-13 11:30:26,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-13 11:30:26,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:25" (1/2) ... [2021-06-13 11:30:26,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac8e087 and model type easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 11:30:26, skipping insertion in model container [2021-06-13 11:30:26,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 11:30:26" (2/2) ... [2021-06-13 11:30:26,013 INFO L111 eAbstractionObserver]: Analyzing ICFG easy7.wvr.bpl [2021-06-13 11:30:26,017 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-13 11:30:26,018 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-13 11:30:26,018 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-13 11:30:26,047 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-13 11:30:26,069 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-13 11:30:26,096 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 11:30:26,097 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 11:30:26,097 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 11:30:26,097 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 11:30:26,097 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 11:30:26,097 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 11:30:26,097 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 11:30:26,097 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-13 11:30:26,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 21 transitions, 58 flow [2021-06-13 11:30:26,132 INFO L129 PetriNetUnfolder]: 0/19 cut-off events. [2021-06-13 11:30:26,132 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 11:30:26,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 0/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-13 11:30:26,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 21 transitions, 58 flow [2021-06-13 11:30:26,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 17 transitions, 46 flow [2021-06-13 11:30:26,158 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-13 11:30:26,158 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 11:30:26,159 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:26,159 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:26,160 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:26,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1031121219, now seen corresponding path program 1 times [2021-06-13 11:30:26,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:26,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869285120] [2021-06-13 11:30:26,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:26,378 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,379 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:26,402 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:26,442 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,467 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:26,493 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,494 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:26,534 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,534 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:26,552 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:26,554 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,555 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:26,556 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,557 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:26,561 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 11:30:26,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 11:30:26,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,567 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:26,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:26,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869285120] [2021-06-13 11:30:26,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869285120] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:26,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:26,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-13 11:30:26,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678348288] [2021-06-13 11:30:26,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 11:30:26,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:26,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 11:30:26,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 11:30:26,590 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 21 [2021-06-13 11:30:26,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 46 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:26,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:26,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 21 [2021-06-13 11:30:26,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:26,810 INFO L129 PetriNetUnfolder]: 21/77 cut-off events. [2021-06-13 11:30:26,810 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-06-13 11:30:26,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 77 events. 21/77 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 230 event pairs, 0 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 130. Up to 37 conditions per place. [2021-06-13 11:30:26,813 INFO L132 encePairwiseOnDemand]: 11/21 looper letters, 8 selfloop transitions, 17 changer transitions 8/40 dead transitions. [2021-06-13 11:30:26,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 40 transitions, 158 flow [2021-06-13 11:30:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-13 11:30:26,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-13 11:30:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2021-06-13 11:30:26,825 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7074829931972789 [2021-06-13 11:30:26,826 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 104 transitions. [2021-06-13 11:30:26,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 104 transitions. [2021-06-13 11:30:26,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:26,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 104 transitions. [2021-06-13 11:30:26,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:26,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:26,838 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:26,840 INFO L185 Difference]: Start difference. First operand has 24 places, 17 transitions, 46 flow. Second operand 7 states and 104 transitions. [2021-06-13 11:30:26,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 40 transitions, 158 flow [2021-06-13 11:30:26,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-13 11:30:26,847 INFO L241 Difference]: Finished difference. Result has 30 places, 32 transitions, 155 flow [2021-06-13 11:30:26,848 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=155, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2021-06-13 11:30:26,849 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 6 predicate places. [2021-06-13 11:30:26,849 INFO L482 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 155 flow [2021-06-13 11:30:26,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:26,849 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:26,850 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:26,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-13 11:30:26,851 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:26,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:26,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2069705661, now seen corresponding path program 2 times [2021-06-13 11:30:26,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:26,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729502208] [2021-06-13 11:30:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:26,894 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:26,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:26,905 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:26,913 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,914 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:26,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:26,925 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:26,926 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,927 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:26,930 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:26,941 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 11:30:26,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 11:30:26,945 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:26,945 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:26,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:26,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:26,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729502208] [2021-06-13 11:30:26,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729502208] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:26,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:26,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-13 11:30:26,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470401393] [2021-06-13 11:30:26,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 11:30:26,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:26,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 11:30:26,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 11:30:26,950 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 21 [2021-06-13 11:30:26,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 155 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:26,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:26,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 21 [2021-06-13 11:30:26,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:27,143 INFO L129 PetriNetUnfolder]: 22/85 cut-off events. [2021-06-13 11:30:27,143 INFO L130 PetriNetUnfolder]: For 71/73 co-relation queries the response was YES. [2021-06-13 11:30:27,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 85 events. 22/85 cut-off events. For 71/73 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 271 event pairs, 0 based on Foata normal form. 3/88 useless extension candidates. Maximal degree in co-relation 236. Up to 30 conditions per place. [2021-06-13 11:30:27,145 INFO L132 encePairwiseOnDemand]: 11/21 looper letters, 7 selfloop transitions, 19 changer transitions 20/53 dead transitions. [2021-06-13 11:30:27,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 53 transitions, 361 flow [2021-06-13 11:30:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-13 11:30:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-13 11:30:27,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2021-06-13 11:30:27,162 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7346938775510204 [2021-06-13 11:30:27,162 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 108 transitions. [2021-06-13 11:30:27,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 108 transitions. [2021-06-13 11:30:27,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:27,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 108 transitions. [2021-06-13 11:30:27,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,164 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,164 INFO L185 Difference]: Start difference. First operand has 30 places, 32 transitions, 155 flow. Second operand 7 states and 108 transitions. [2021-06-13 11:30:27,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 53 transitions, 361 flow [2021-06-13 11:30:27,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 357 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-06-13 11:30:27,170 INFO L241 Difference]: Finished difference. Result has 38 places, 33 transitions, 244 flow [2021-06-13 11:30:27,170 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=244, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2021-06-13 11:30:27,172 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 14 predicate places. [2021-06-13 11:30:27,172 INFO L482 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 244 flow [2021-06-13 11:30:27,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,173 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:27,173 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:27,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-13 11:30:27,173 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:27,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1292478269, now seen corresponding path program 3 times [2021-06-13 11:30:27,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:27,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15807562] [2021-06-13 11:30:27,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:27,200 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,201 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:27,204 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,205 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,213 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,220 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,222 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:27,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,225 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,234 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,234 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,249 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,253 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 11:30:27,254 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 11:30:27,259 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,259 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:27,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:27,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15807562] [2021-06-13 11:30:27,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15807562] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:27,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:27,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-13 11:30:27,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894285754] [2021-06-13 11:30:27,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 11:30:27,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:27,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 11:30:27,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 11:30:27,262 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 21 [2021-06-13 11:30:27,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:27,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 21 [2021-06-13 11:30:27,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:27,425 INFO L129 PetriNetUnfolder]: 16/69 cut-off events. [2021-06-13 11:30:27,426 INFO L130 PetriNetUnfolder]: For 174/176 co-relation queries the response was YES. [2021-06-13 11:30:27,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 69 events. 16/69 cut-off events. For 174/176 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 189 event pairs, 0 based on Foata normal form. 3/72 useless extension candidates. Maximal degree in co-relation 233. Up to 29 conditions per place. [2021-06-13 11:30:27,427 INFO L132 encePairwiseOnDemand]: 11/21 looper letters, 6 selfloop transitions, 13 changer transitions 24/50 dead transitions. [2021-06-13 11:30:27,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 504 flow [2021-06-13 11:30:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-13 11:30:27,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-13 11:30:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2021-06-13 11:30:27,434 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7210884353741497 [2021-06-13 11:30:27,434 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 106 transitions. [2021-06-13 11:30:27,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 106 transitions. [2021-06-13 11:30:27,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:27,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 106 transitions. [2021-06-13 11:30:27,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,437 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,437 INFO L185 Difference]: Start difference. First operand has 38 places, 33 transitions, 244 flow. Second operand 7 states and 106 transitions. [2021-06-13 11:30:27,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 504 flow [2021-06-13 11:30:27,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 460 flow, removed 19 selfloop flow, removed 4 redundant places. [2021-06-13 11:30:27,445 INFO L241 Difference]: Finished difference. Result has 42 places, 26 transitions, 241 flow [2021-06-13 11:30:27,445 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=241, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2021-06-13 11:30:27,446 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 18 predicate places. [2021-06-13 11:30:27,446 INFO L482 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 241 flow [2021-06-13 11:30:27,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,446 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:27,446 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:27,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-13 11:30:27,446 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:27,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:27,447 INFO L82 PathProgramCache]: Analyzing trace with hash -768419787, now seen corresponding path program 4 times [2021-06-13 11:30:27,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:27,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751043099] [2021-06-13 11:30:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:27,496 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,497 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:27,501 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,502 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,511 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,511 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:27,520 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,522 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,533 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,534 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,552 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,554 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,564 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,570 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,571 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,579 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 11:30:27,580 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 11:30:27,585 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,586 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:27,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:27,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751043099] [2021-06-13 11:30:27,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751043099] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:27,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:27,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-13 11:30:27,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159654067] [2021-06-13 11:30:27,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 11:30:27,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:27,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 11:30:27,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 11:30:27,589 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 21 [2021-06-13 11:30:27,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 26 transitions, 241 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:27,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 21 [2021-06-13 11:30:27,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:27,690 INFO L129 PetriNetUnfolder]: 6/43 cut-off events. [2021-06-13 11:30:27,690 INFO L130 PetriNetUnfolder]: For 197/199 co-relation queries the response was YES. [2021-06-13 11:30:27,691 INFO L84 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 43 events. 6/43 cut-off events. For 197/199 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 3/46 useless extension candidates. Maximal degree in co-relation 125. Up to 19 conditions per place. [2021-06-13 11:30:27,691 INFO L132 encePairwiseOnDemand]: 11/21 looper letters, 5 selfloop transitions, 5 changer transitions 20/37 dead transitions. [2021-06-13 11:30:27,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 37 transitions, 477 flow [2021-06-13 11:30:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-13 11:30:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-13 11:30:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2021-06-13 11:30:27,693 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2021-06-13 11:30:27,693 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 98 transitions. [2021-06-13 11:30:27,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 98 transitions. [2021-06-13 11:30:27,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:27,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 98 transitions. [2021-06-13 11:30:27,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,695 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,695 INFO L185 Difference]: Start difference. First operand has 42 places, 26 transitions, 241 flow. Second operand 7 states and 98 transitions. [2021-06-13 11:30:27,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 37 transitions, 477 flow [2021-06-13 11:30:27,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 399 flow, removed 30 selfloop flow, removed 6 redundant places. [2021-06-13 11:30:27,702 INFO L241 Difference]: Finished difference. Result has 44 places, 17 transitions, 148 flow [2021-06-13 11:30:27,702 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=17} [2021-06-13 11:30:27,702 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 20 predicate places. [2021-06-13 11:30:27,702 INFO L482 AbstractCegarLoop]: Abstraction has has 44 places, 17 transitions, 148 flow [2021-06-13 11:30:27,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,703 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:27,703 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:27,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-13 11:30:27,703 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:27,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1010222643, now seen corresponding path program 5 times [2021-06-13 11:30:27,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:27,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104206052] [2021-06-13 11:30:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:27,726 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,727 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:27,730 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,730 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,737 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,737 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,745 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,746 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,756 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,768 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,768 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,771 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 11:30:27,775 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 11:30:27,776 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 11:30:27,779 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:27,779 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:27,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:27,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104206052] [2021-06-13 11:30:27,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104206052] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:27,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:27,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-13 11:30:27,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766580147] [2021-06-13 11:30:27,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 11:30:27,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:27,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 11:30:27,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 11:30:27,782 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 21 [2021-06-13 11:30:27,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 17 transitions, 148 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:27,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 21 [2021-06-13 11:30:27,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:27,815 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-06-13 11:30:27,816 INFO L130 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2021-06-13 11:30:27,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 15 events. 0/15 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/16 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-06-13 11:30:27,816 INFO L132 encePairwiseOnDemand]: 11/21 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2021-06-13 11:30:27,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 15 transitions, 160 flow [2021-06-13 11:30:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-13 11:30:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-13 11:30:27,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2021-06-13 11:30:27,817 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2021-06-13 11:30:27,818 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 80 transitions. [2021-06-13 11:30:27,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 80 transitions. [2021-06-13 11:30:27,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:27,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 80 transitions. [2021-06-13 11:30:27,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,819 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,819 INFO L185 Difference]: Start difference. First operand has 44 places, 17 transitions, 148 flow. Second operand 7 states and 80 transitions. [2021-06-13 11:30:27,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 15 transitions, 160 flow [2021-06-13 11:30:27,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 15 transitions, 66 flow, removed 29 selfloop flow, removed 19 redundant places. [2021-06-13 11:30:27,821 INFO L241 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2021-06-13 11:30:27,821 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2021-06-13 11:30:27,821 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2021-06-13 11:30:27,821 INFO L482 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2021-06-13 11:30:27,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:27,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-13 11:30:27,824 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-13 11:30:27,826 INFO L202 PluginConnector]: Adding new model easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.06 11:30:27 BasicIcfg [2021-06-13 11:30:27,826 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-13 11:30:27,827 INFO L168 Benchmark]: Toolchain (without parser) took 2040.91 ms. Allocated memory is still 185.6 MB. Free memory was 164.6 MB in the beginning and 129.9 MB in the end (delta: 34.7 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. [2021-06-13 11:30:27,827 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 185.6 MB. Free memory is still 165.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 11:30:27,828 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.20 ms. Allocated memory is still 185.6 MB. Free memory was 164.4 MB in the beginning and 162.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 11:30:27,828 INFO L168 Benchmark]: Boogie Preprocessor took 11.45 ms. Allocated memory is still 185.6 MB. Free memory was 162.9 MB in the beginning and 162.1 MB in the end (delta: 822.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 11:30:27,828 INFO L168 Benchmark]: RCFGBuilder took 188.73 ms. Allocated memory is still 185.6 MB. Free memory was 162.1 MB in the beginning and 152.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-06-13 11:30:27,829 INFO L168 Benchmark]: TraceAbstraction took 1817.30 ms. Allocated memory is still 185.6 MB. Free memory was 152.4 MB in the beginning and 129.9 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 8.0 GB. [2021-06-13 11:30:27,830 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 185.6 MB. Free memory is still 165.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.20 ms. Allocated memory is still 185.6 MB. Free memory was 164.4 MB in the beginning and 162.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.45 ms. Allocated memory is still 185.6 MB. Free memory was 162.9 MB in the beginning and 162.1 MB in the end (delta: 822.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 188.73 ms. Allocated memory is still 185.6 MB. Free memory was 162.1 MB in the beginning and 152.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1817.30 ms. Allocated memory is still 185.6 MB. Free memory was 152.4 MB in the beginning and 129.9 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 18.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1729.5ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 826.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 42.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 631 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 432.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 285.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=244occurred in iteration=2, InterpolantAutomatonStates: 35, 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: 16.0ms SsaConstructionTime, 69.4ms SatisfiabilityAnalysisTime, 627.0ms InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 534 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...