/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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/node-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 14:48:07,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 14:48:07,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 14:48:07,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 14:48:07,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 14:48:07,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 14:48:07,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 14:48:07,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 14:48:07,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 14:48:07,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 14:48:07,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 14:48:07,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 14:48:07,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 14:48:07,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 14:48:07,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 14:48:07,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 14:48:07,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 14:48:07,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 14:48:07,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 14:48:07,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 14:48:07,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 14:48:07,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 14:48:07,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 14:48:07,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 14:48:07,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 14:48:07,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 14:48:07,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 14:48:07,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 14:48:07,592 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-VariableLbe.epf [2021-03-24 14:48:07,604 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 14:48:07,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 14:48:07,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 14:48:07,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 14:48:07,605 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 14:48:07,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 14:48:07,606 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 14:48:07,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 14:48:07,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 14:48:07,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 14:48:07,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 14:48:07,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 14:48:07,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 14:48:07,606 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 14:48:07,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 14:48:07,607 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 14:48:07,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 14:48:07,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 14:48:07,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 14:48:07,607 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 14:48:07,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 14:48:07,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 14:48:07,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 14:48:07,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 14:48:07,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 14:48:07,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 14:48:07,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 14:48:07,608 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 14:48:07,608 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 14:48:07,608 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 14:48:07,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 14:48:07,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 14:48:07,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 14:48:07,955 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 14:48:07,956 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 14:48:07,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/node-subst.wvr.bpl [2021-03-24 14:48:07,957 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/node-subst.wvr.bpl' [2021-03-24 14:48:08,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 14:48:08,009 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 14:48:08,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 14:48:08,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 14:48:08,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 14:48:08,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:08" (1/1) ... [2021-03-24 14:48:08,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:08" (1/1) ... [2021-03-24 14:48:08,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 14:48:08,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 14:48:08,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 14:48:08,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 14:48:08,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:08" (1/1) ... [2021-03-24 14:48:08,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:08" (1/1) ... [2021-03-24 14:48:08,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:08" (1/1) ... [2021-03-24 14:48:08,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:08" (1/1) ... [2021-03-24 14:48:08,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:08" (1/1) ... [2021-03-24 14:48:08,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:08" (1/1) ... [2021-03-24 14:48:08,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:08" (1/1) ... [2021-03-24 14:48:08,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 14:48:08,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 14:48:08,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 14:48:08,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 14:48:08,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 14:48:08,182 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 14:48:08,182 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 14:48:08,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 14:48:08,183 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 14:48:08,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 14:48:08,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 14:48:08,184 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 14:48:08,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 14:48:08,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 14:48:08,184 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-24 14:48:08,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-24 14:48:08,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-24 14:48:08,185 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 14:48:08,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 14:48:08,395 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 14:48:08,396 INFO L202 PluginConnector]: Adding new model node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 02:48:08 BoogieIcfgContainer [2021-03-24 14:48:08,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 14:48:08,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 14:48:08,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 14:48:08,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 14:48:08,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:48:08" (1/2) ... [2021-03-24 14:48:08,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb25be2 and model type node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 02:48:08, skipping insertion in model container [2021-03-24 14:48:08,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 02:48:08" (2/2) ... [2021-03-24 14:48:08,400 INFO L111 eAbstractionObserver]: Analyzing ICFG node-subst.wvr.bpl [2021-03-24 14:48:08,404 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 14:48:08,406 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 14:48:08,406 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 14:48:08,464 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-24 14:48:08,491 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-24 14:48:08,516 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 14:48:08,516 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 14:48:08,516 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 14:48:08,516 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 14:48:08,516 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 14:48:08,516 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 14:48:08,517 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 14:48:08,517 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 14:48:08,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-03-24 14:48:08,550 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-24 14:48:08,550 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 14:48:08,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 16 events. 0/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 14:48:08,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-03-24 14:48:08,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-03-24 14:48:08,554 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 14:48:08,560 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-24 14:48:08,562 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-24 14:48:08,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 14 transitions, 46 flow [2021-03-24 14:48:08,582 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-24 14:48:08,582 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 14:48:08,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 14 events. 0/14 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 14:48:08,584 INFO L142 LiptonReduction]: Number of co-enabled transitions 48 [2021-03-24 14:48:08,752 INFO L154 LiptonReduction]: Checked pairs total: 18 [2021-03-24 14:48:08,752 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 14:48:08,753 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 200 [2021-03-24 14:48:08,760 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-24 14:48:08,760 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 14:48:08,760 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:48:08,760 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:48:08,761 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:48:08,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:48:08,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1174649455, now seen corresponding path program 1 times [2021-03-24 14:48:08,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:48:08,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339672047] [2021-03-24 14:48:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:48:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:48:09,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:48:09,006 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:48:09,038 INFO L142 QuantifierPusher]: treesize reduction 220, result has 46.2 percent of original size [2021-03-24 14:48:09,053 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-03-24 14:48:09,129 INFO L142 QuantifierPusher]: treesize reduction 376, result has 39.5 percent of original size [2021-03-24 14:48:09,139 INFO L147 QuantifierPusher]: treesize reduction 9, result has 96.3 percent of original size 237 [2021-03-24 14:48:09,273 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-03-24 14:48:09,279 INFO L142 QuantifierPusher]: treesize reduction 149, result has 47.3 percent of original size [2021-03-24 14:48:09,281 INFO L147 QuantifierPusher]: treesize reduction 46, result has 65.7 percent of original size 88 [2021-03-24 14:48:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 14:48:09,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339672047] [2021-03-24 14:48:09,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:48:09,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:48:09,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738720587] [2021-03-24 14:48:09,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:48:09,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:48:09,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:48:09,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:48:09,397 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:48:09,398 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 10 transitions, 38 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:09,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:48:09,398 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:48:09,399 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:48:09,594 INFO L129 PetriNetUnfolder]: 3/27 cut-off events. [2021-03-24 14:48:09,595 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-03-24 14:48:09,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 27 events. 3/27 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 65 event pairs, 1 based on Foata normal form. 1/27 useless extension candidates. Maximal degree in co-relation 38. Up to 7 conditions per place. [2021-03-24 14:48:09,597 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 1/14 dead transitions. [2021-03-24 14:48:09,597 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 14 transitions, 62 flow [2021-03-24 14:48:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:48:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:48:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 14:48:09,612 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 14:48:09,612 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 14:48:09,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 14:48:09,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:48:09,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 14:48:09,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:09,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:09,620 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:09,621 INFO L185 Difference]: Start difference. First operand has 20 places, 10 transitions, 38 flow. Second operand 5 states and 79 transitions. [2021-03-24 14:48:09,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 14 transitions, 62 flow [2021-03-24 14:48:09,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 14 transitions, 50 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-24 14:48:09,626 INFO L241 Difference]: Finished difference. Result has 21 places, 11 transitions, 41 flow [2021-03-24 14:48:09,627 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=41, PETRI_PLACES=21, PETRI_TRANSITIONS=11} [2021-03-24 14:48:09,627 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2021-03-24 14:48:09,628 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 11 transitions, 41 flow [2021-03-24 14:48:09,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:09,628 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:48:09,628 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:48:09,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 14:48:09,628 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:48:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:48:09,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1445140561, now seen corresponding path program 2 times [2021-03-24 14:48:09,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:48:09,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68933083] [2021-03-24 14:48:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:48:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:48:09,809 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:48:09,810 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:48:09,829 INFO L142 QuantifierPusher]: treesize reduction 331, result has 41.7 percent of original size [2021-03-24 14:48:09,830 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 237 [2021-03-24 14:48:09,970 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-03-24 14:48:09,992 INFO L142 QuantifierPusher]: treesize reduction 863, result has 42.4 percent of original size [2021-03-24 14:48:09,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 635 [2021-03-24 14:48:10,204 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2021-03-24 14:48:10,214 INFO L142 QuantifierPusher]: treesize reduction 764, result has 26.0 percent of original size [2021-03-24 14:48:10,217 INFO L147 QuantifierPusher]: treesize reduction 45, result has 83.3 percent of original size 224 [2021-03-24 14:48:10,393 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2021-03-24 14:48:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 14:48:10,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68933083] [2021-03-24 14:48:10,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:48:10,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:48:10,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24327678] [2021-03-24 14:48:10,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:48:10,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:48:10,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:48:10,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:48:10,397 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:48:10,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 11 transitions, 41 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:10,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:48:10,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:48:10,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:48:10,513 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-24 14:48:10,682 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-24 14:48:10,695 INFO L129 PetriNetUnfolder]: 1/31 cut-off events. [2021-03-24 14:48:10,695 INFO L130 PetriNetUnfolder]: For 25/28 co-relation queries the response was YES. [2021-03-24 14:48:10,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 31 events. 1/31 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 102 event pairs, 1 based on Foata normal form. 1/30 useless extension candidates. Maximal degree in co-relation 59. Up to 8 conditions per place. [2021-03-24 14:48:10,699 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 3 changer transitions 1/15 dead transitions. [2021-03-24 14:48:10,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 15 transitions, 77 flow [2021-03-24 14:48:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:48:10,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:48:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 14:48:10,705 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 14:48:10,705 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 14:48:10,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 14:48:10,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:48:10,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 14:48:10,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:10,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:10,709 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:10,710 INFO L185 Difference]: Start difference. First operand has 21 places, 11 transitions, 41 flow. Second operand 5 states and 79 transitions. [2021-03-24 14:48:10,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 15 transitions, 77 flow [2021-03-24 14:48:10,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 70 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-24 14:48:10,711 INFO L241 Difference]: Finished difference. Result has 25 places, 12 transitions, 58 flow [2021-03-24 14:48:10,711 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=58, PETRI_PLACES=25, PETRI_TRANSITIONS=12} [2021-03-24 14:48:10,712 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2021-03-24 14:48:10,712 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 12 transitions, 58 flow [2021-03-24 14:48:10,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:10,712 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:48:10,712 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:48:10,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 14:48:10,713 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:48:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:48:10,713 INFO L82 PathProgramCache]: Analyzing trace with hash 328116283, now seen corresponding path program 3 times [2021-03-24 14:48:10,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:48:10,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505429646] [2021-03-24 14:48:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:48:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:48:10,800 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:48:10,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:48:10,808 INFO L142 QuantifierPusher]: treesize reduction 2488, result has 9.2 percent of original size [2021-03-24 14:48:10,809 INFO L147 QuantifierPusher]: treesize reduction 82, result has 67.3 percent of original size 169 [2021-03-24 14:48:10,888 INFO L142 QuantifierPusher]: treesize reduction 1925, result has 17.1 percent of original size [2021-03-24 14:48:10,891 INFO L147 QuantifierPusher]: treesize reduction 108, result has 72.7 percent of original size 288 [2021-03-24 14:48:10,987 INFO L142 QuantifierPusher]: treesize reduction 1099, result has 23.3 percent of original size [2021-03-24 14:48:10,990 INFO L147 QuantifierPusher]: treesize reduction 179, result has 46.4 percent of original size 155 [2021-03-24 14:48:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 14:48:11,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505429646] [2021-03-24 14:48:11,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:48:11,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:48:11,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066701369] [2021-03-24 14:48:11,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:48:11,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:48:11,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:48:11,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:48:11,083 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:48:11,084 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 12 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:11,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:48:11,084 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:48:11,084 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:48:11,201 INFO L129 PetriNetUnfolder]: 1/28 cut-off events. [2021-03-24 14:48:11,201 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-03-24 14:48:11,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 28 events. 1/28 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 82 event pairs, 0 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 69. Up to 6 conditions per place. [2021-03-24 14:48:11,201 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 3 changer transitions 3/17 dead transitions. [2021-03-24 14:48:11,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 112 flow [2021-03-24 14:48:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:48:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:48:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 14:48:11,203 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 14:48:11,203 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 14:48:11,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 14:48:11,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:48:11,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 14:48:11,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:11,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:11,206 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:11,207 INFO L185 Difference]: Start difference. First operand has 25 places, 12 transitions, 58 flow. Second operand 5 states and 79 transitions. [2021-03-24 14:48:11,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 112 flow [2021-03-24 14:48:11,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 17 transitions, 102 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-24 14:48:11,212 INFO L241 Difference]: Finished difference. Result has 29 places, 12 transitions, 68 flow [2021-03-24 14:48:11,212 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=29, PETRI_TRANSITIONS=12} [2021-03-24 14:48:11,212 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2021-03-24 14:48:11,212 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 12 transitions, 68 flow [2021-03-24 14:48:11,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:11,213 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:48:11,213 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:48:11,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 14:48:11,213 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:48:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:48:11,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1202355085, now seen corresponding path program 4 times [2021-03-24 14:48:11,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:48:11,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110377755] [2021-03-24 14:48:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:48:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:48:11,305 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:48:11,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:48:11,310 INFO L142 QuantifierPusher]: treesize reduction 631, result has 22.7 percent of original size [2021-03-24 14:48:11,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-03-24 14:48:11,375 INFO L142 QuantifierPusher]: treesize reduction 344, result has 42.3 percent of original size [2021-03-24 14:48:11,376 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 252 [2021-03-24 14:48:11,447 INFO L142 QuantifierPusher]: treesize reduction 353, result has 26.5 percent of original size [2021-03-24 14:48:11,448 INFO L147 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size 124 [2021-03-24 14:48:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 14:48:11,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110377755] [2021-03-24 14:48:11,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:48:11,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:48:11,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768695775] [2021-03-24 14:48:11,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:48:11,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:48:11,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:48:11,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:48:11,525 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:48:11,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 12 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:11,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:48:11,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:48:11,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:48:11,688 INFO L129 PetriNetUnfolder]: 0/26 cut-off events. [2021-03-24 14:48:11,689 INFO L130 PetriNetUnfolder]: For 70/76 co-relation queries the response was YES. [2021-03-24 14:48:11,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 26 events. 0/26 cut-off events. For 70/76 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 58 event pairs, 0 based on Foata normal form. 1/25 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-24 14:48:11,689 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 3/16 dead transitions. [2021-03-24 14:48:11,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 16 transitions, 122 flow [2021-03-24 14:48:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:48:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:48:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 14:48:11,692 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 14:48:11,692 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 14:48:11,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 14:48:11,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:48:11,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 14:48:11,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:11,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:11,695 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:11,695 INFO L185 Difference]: Start difference. First operand has 29 places, 12 transitions, 68 flow. Second operand 5 states and 79 transitions. [2021-03-24 14:48:11,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 16 transitions, 122 flow [2021-03-24 14:48:11,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 16 transitions, 104 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-03-24 14:48:11,700 INFO L241 Difference]: Finished difference. Result has 31 places, 12 transitions, 71 flow [2021-03-24 14:48:11,701 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=12} [2021-03-24 14:48:11,702 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2021-03-24 14:48:11,702 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 12 transitions, 71 flow [2021-03-24 14:48:11,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:11,702 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:48:11,702 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:48:11,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 14:48:11,702 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:48:11,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:48:11,703 INFO L82 PathProgramCache]: Analyzing trace with hash 343480555, now seen corresponding path program 5 times [2021-03-24 14:48:11,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:48:11,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020398536] [2021-03-24 14:48:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:48:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:48:11,765 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:48:11,765 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:48:11,768 INFO L142 QuantifierPusher]: treesize reduction 1394, result has 9.6 percent of original size [2021-03-24 14:48:11,769 INFO L147 QuantifierPusher]: treesize reduction 22, result has 85.1 percent of original size 126 [2021-03-24 14:48:11,829 INFO L142 QuantifierPusher]: treesize reduction 686, result has 37.4 percent of original size [2021-03-24 14:48:11,831 INFO L147 QuantifierPusher]: treesize reduction 10, result has 97.6 percent of original size 399 [2021-03-24 14:48:12,017 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2021-03-24 14:48:12,040 INFO L142 QuantifierPusher]: treesize reduction 487, result has 25.6 percent of original size [2021-03-24 14:48:12,042 INFO L147 QuantifierPusher]: treesize reduction 6, result has 96.4 percent of original size 162 [2021-03-24 14:48:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 14:48:12,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020398536] [2021-03-24 14:48:12,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:48:12,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:48:12,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254698384] [2021-03-24 14:48:12,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:48:12,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:48:12,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:48:12,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:48:12,150 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:48:12,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 12 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:12,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:48:12,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:48:12,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:48:12,343 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-24 14:48:12,343 INFO L130 PetriNetUnfolder]: For 56/62 co-relation queries the response was YES. [2021-03-24 14:48:12,343 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 17 events. 0/17 cut-off events. For 56/62 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 19 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-24 14:48:12,344 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 3/13 dead transitions. [2021-03-24 14:48:12,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 13 transitions, 94 flow [2021-03-24 14:48:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:48:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:48:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-03-24 14:48:12,348 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2021-03-24 14:48:12,348 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-03-24 14:48:12,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-03-24 14:48:12,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:48:12,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-03-24 14:48:12,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:12,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:12,350 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:12,350 INFO L185 Difference]: Start difference. First operand has 31 places, 12 transitions, 71 flow. Second operand 5 states and 77 transitions. [2021-03-24 14:48:12,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 13 transitions, 94 flow [2021-03-24 14:48:12,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 13 transitions, 79 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-03-24 14:48:12,353 INFO L241 Difference]: Finished difference. Result has 31 places, 10 transitions, 49 flow [2021-03-24 14:48:12,353 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=31, PETRI_TRANSITIONS=10} [2021-03-24 14:48:12,353 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2021-03-24 14:48:12,353 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 10 transitions, 49 flow [2021-03-24 14:48:12,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:12,353 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:48:12,353 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:48:12,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 14:48:12,353 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:48:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:48:12,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1416840285, now seen corresponding path program 6 times [2021-03-24 14:48:12,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:48:12,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390830487] [2021-03-24 14:48:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:48:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:48:12,433 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:48:12,434 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:48:12,443 INFO L142 QuantifierPusher]: treesize reduction 3710, result has 14.3 percent of original size [2021-03-24 14:48:12,446 INFO L147 QuantifierPusher]: treesize reduction 81, result has 86.9 percent of original size 536 [2021-03-24 14:48:12,561 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2021-03-24 14:48:12,604 INFO L142 QuantifierPusher]: treesize reduction 3717, result has 29.2 percent of original size [2021-03-24 14:48:12,609 INFO L147 QuantifierPusher]: treesize reduction 704, result has 54.1 percent of original size 831 [2021-03-24 14:48:13,026 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 58 [2021-03-24 14:48:13,052 INFO L142 QuantifierPusher]: treesize reduction 1976, result has 22.8 percent of original size [2021-03-24 14:48:13,055 INFO L147 QuantifierPusher]: treesize reduction 383, result has 34.3 percent of original size 200 [2021-03-24 14:48:13,163 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 21 [2021-03-24 14:48:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 14:48:13,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390830487] [2021-03-24 14:48:13,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:48:13,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:48:13,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094255941] [2021-03-24 14:48:13,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:48:13,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:48:13,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:48:13,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:48:13,165 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:48:13,165 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 10 transitions, 49 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:13,165 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:48:13,165 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:48:13,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:48:13,369 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-24 14:48:13,369 INFO L130 PetriNetUnfolder]: For 25/27 co-relation queries the response was YES. [2021-03-24 14:48:13,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 10 events. 0/10 cut-off events. For 25/27 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 14:48:13,370 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-03-24 14:48:13,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 10 transitions, 60 flow [2021-03-24 14:48:13,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:48:13,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:48:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-03-24 14:48:13,370 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2021-03-24 14:48:13,370 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-03-24 14:48:13,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-03-24 14:48:13,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:48:13,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-03-24 14:48:13,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:13,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:13,371 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:13,371 INFO L185 Difference]: Start difference. First operand has 31 places, 10 transitions, 49 flow. Second operand 5 states and 75 transitions. [2021-03-24 14:48:13,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 10 transitions, 60 flow [2021-03-24 14:48:13,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 10 transitions, 40 flow, removed 3 selfloop flow, removed 8 redundant places. [2021-03-24 14:48:13,372 INFO L241 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2021-03-24 14:48:13,372 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2021-03-24 14:48:13,372 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2021-03-24 14:48:13,372 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2021-03-24 14:48:13,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:48:13,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 14:48:13,374 INFO L202 PluginConnector]: Adding new model node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 02:48:13 BasicIcfg [2021-03-24 14:48:13,375 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 14:48:13,375 INFO L168 Benchmark]: Toolchain (without parser) took 5366.39 ms. Allocated memory was 337.6 MB in the beginning and 455.1 MB in the end (delta: 117.4 MB). Free memory was 317.3 MB in the beginning and 248.9 MB in the end (delta: 68.4 MB). Peak memory consumption was 188.8 MB. Max. memory is 16.0 GB. [2021-03-24 14:48:13,375 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 337.6 MB. Free memory was 318.5 MB in the beginning and 318.4 MB in the end (delta: 125.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 14:48:13,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.23 ms. Allocated memory is still 337.6 MB. Free memory was 317.2 MB in the beginning and 315.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 14:48:13,376 INFO L168 Benchmark]: Boogie Preprocessor took 24.68 ms. Allocated memory is still 337.6 MB. Free memory was 315.7 MB in the beginning and 314.7 MB in the end (delta: 991.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 14:48:13,376 INFO L168 Benchmark]: RCFGBuilder took 335.57 ms. Allocated memory is still 337.6 MB. Free memory was 314.7 MB in the beginning and 299.2 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-24 14:48:13,377 INFO L168 Benchmark]: TraceAbstraction took 4977.55 ms. Allocated memory was 337.6 MB in the beginning and 455.1 MB in the end (delta: 117.4 MB). Free memory was 298.6 MB in the beginning and 248.9 MB in the end (delta: 49.8 MB). Peak memory consumption was 169.9 MB. Max. memory is 16.0 GB. [2021-03-24 14:48:13,378 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 0.10 ms. Allocated memory is still 337.6 MB. Free memory was 318.5 MB in the beginning and 318.4 MB in the end (delta: 125.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.23 ms. Allocated memory is still 337.6 MB. Free memory was 317.2 MB in the beginning and 315.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.68 ms. Allocated memory is still 337.6 MB. Free memory was 315.7 MB in the beginning and 314.7 MB in the end (delta: 991.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 335.57 ms. Allocated memory is still 337.6 MB. Free memory was 314.7 MB in the beginning and 299.2 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4977.55 ms. Allocated memory was 337.6 MB in the beginning and 455.1 MB in the end (delta: 117.4 MB). Free memory was 298.6 MB in the beginning and 248.9 MB in the end (delta: 49.8 MB). Peak memory consumption was 169.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 190.4ms, 24 PlacesBefore, 20 PlacesAfterwards, 14 TransitionsBefore, 10 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 18 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 15, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 15, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 18, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 15, unknown conditional: 0, unknown unconditional: 15] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 68]: 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: 3.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 4871.5ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1270.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 239.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 28 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 86.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3220.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=4, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 13.5ms SsaConstructionTime, 149.2ms SatisfiabilityAnalysisTime, 3059.8ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 2902 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...