/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/container-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 14:41:38,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 14:41:38,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 14:41:38,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 14:41:38,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 14:41:38,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 14:41:38,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 14:41:38,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 14:41:38,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 14:41:38,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 14:41:38,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 14:41:38,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 14:41:38,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 14:41:38,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 14:41:38,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 14:41:38,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 14:41:38,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 14:41:38,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 14:41:38,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 14:41:38,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 14:41:38,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 14:41:38,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 14:41:38,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 14:41:38,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 14:41:38,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 14:41:38,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 14:41:38,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 14:41:38,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 14:41:38,492 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 14:41:38,528 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 14:41:38,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 14:41:38,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 14:41:38,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 14:41:38,532 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 14:41:38,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 14:41:38,532 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 14:41:38,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 14:41:38,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 14:41:38,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 14:41:38,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 14:41:38,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 14:41:38,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 14:41:38,534 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 14:41:38,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 14:41:38,534 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 14:41:38,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 14:41:38,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 14:41:38,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 14:41:38,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 14:41:38,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 14:41:38,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 14:41:38,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 14:41:38,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 14:41:38,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 14:41:38,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 14:41:38,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 14:41:38,536 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 14:41:38,536 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 14:41:38,536 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 14:41:38,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 14:41:38,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 14:41:38,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 14:41:38,856 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 14:41:38,857 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 14:41:38,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-trans.wvr.bpl [2021-03-24 14:41:38,858 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-trans.wvr.bpl' [2021-03-24 14:41:38,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 14:41:38,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 14:41:38,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 14:41:38,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 14:41:38,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 14:41:38,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:38" (1/1) ... [2021-03-24 14:41:38,924 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:38" (1/1) ... [2021-03-24 14:41:38,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 14:41:38,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 14:41:38,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 14:41:38,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 14:41:38,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:38" (1/1) ... [2021-03-24 14:41:38,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:38" (1/1) ... [2021-03-24 14:41:38,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:38" (1/1) ... [2021-03-24 14:41:38,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:38" (1/1) ... [2021-03-24 14:41:38,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:38" (1/1) ... [2021-03-24 14:41:38,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:38" (1/1) ... [2021-03-24 14:41:38,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:38" (1/1) ... [2021-03-24 14:41:38,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 14:41:38,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 14:41:38,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 14:41:38,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 14:41:38,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:38" (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 14:41:39,018 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 14:41:39,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 14:41:39,019 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 14:41:39,019 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 14:41:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 14:41:39,019 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 14:41:39,019 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 14:41:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 14:41:39,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 14:41:39,019 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-24 14:41:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-24 14:41:39,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-24 14:41:39,020 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 14:41:39,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 14:41:39,300 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 14:41:39,301 INFO L202 PluginConnector]: Adding new model container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 02:41:39 BoogieIcfgContainer [2021-03-24 14:41:39,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 14:41:39,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 14:41:39,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 14:41:39,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 14:41:39,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 02:41:38" (1/2) ... [2021-03-24 14:41:39,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4af9db and model type container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 02:41:39, skipping insertion in model container [2021-03-24 14:41:39,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 02:41:39" (2/2) ... [2021-03-24 14:41:39,307 INFO L111 eAbstractionObserver]: Analyzing ICFG container-trans.wvr.bpl [2021-03-24 14:41:39,311 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 14:41:39,314 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 14:41:39,314 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 14:41:39,341 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-24 14:41:39,356 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-24 14:41:39,390 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 14:41:39,390 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 14:41:39,390 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 14:41:39,390 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 14:41:39,390 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 14:41:39,390 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 14:41:39,390 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 14:41:39,390 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 14:41:39,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-03-24 14:41:39,415 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-24 14:41:39,415 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 14:41:39,417 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 14:41:39,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-03-24 14:41:39,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-03-24 14:41:39,421 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 14:41:39,429 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-24 14:41:39,431 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-24 14:41:39,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 14 transitions, 46 flow [2021-03-24 14:41:39,446 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-24 14:41:39,446 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 14:41:39,446 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 14 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 14:41:39,448 INFO L142 LiptonReduction]: Number of co-enabled transitions 48 [2021-03-24 14:41:39,560 INFO L154 LiptonReduction]: Checked pairs total: 18 [2021-03-24 14:41:39,560 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 14:41:39,562 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 142 [2021-03-24 14:41:39,573 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-24 14:41:39,573 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 14:41:39,573 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:41:39,577 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:41:39,577 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:41:39,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:41:39,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1809114803, now seen corresponding path program 1 times [2021-03-24 14:41:39,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:41:39,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874768018] [2021-03-24 14:41:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:41:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:41:40,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:40,010 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:41:40,149 INFO L142 QuantifierPusher]: treesize reduction 2652, result has 27.0 percent of original size [2021-03-24 14:41:40,167 INFO L147 QuantifierPusher]: treesize reduction 477, result has 51.5 percent of original size 506 [2021-03-24 14:41:40,438 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2021-03-24 14:41:40,496 INFO L142 QuantifierPusher]: treesize reduction 1323, result has 34.8 percent of original size [2021-03-24 14:41:40,506 INFO L147 QuantifierPusher]: treesize reduction 160, result has 77.3 percent of original size 546 [2021-03-24 14:41:40,751 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 50 [2021-03-24 14:41:40,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:40,754 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-24 14:41:40,783 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 14:41:40,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874768018] [2021-03-24 14:41:40,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:41:40,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:41:40,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215404859] [2021-03-24 14:41:40,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:41:40,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:41:40,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:41:40,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:41:40,814 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:41:40,816 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 14:41:40,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:41:40,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:41:40,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:41:41,076 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-03-24 14:41:41,076 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-03-24 14:41:41,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 29 events. 3/29 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 81 event pairs, 1 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 42. Up to 7 conditions per place. [2021-03-24 14:41:41,078 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 1/14 dead transitions. [2021-03-24 14:41:41,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 14 transitions, 62 flow [2021-03-24 14:41:41,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:41:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:41:41,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 14:41:41,089 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 14:41:41,090 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 14:41:41,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 14:41:41,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:41:41,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 14:41:41,117 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 14:41:41,130 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 14:41:41,130 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 14:41:41,132 INFO L185 Difference]: Start difference. First operand has 20 places, 10 transitions, 38 flow. Second operand 5 states and 79 transitions. [2021-03-24 14:41:41,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 14 transitions, 62 flow [2021-03-24 14:41:41,143 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 14:41:41,144 INFO L241 Difference]: Finished difference. Result has 21 places, 11 transitions, 41 flow [2021-03-24 14:41:41,145 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 14:41:41,146 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2021-03-24 14:41:41,146 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 11 transitions, 41 flow [2021-03-24 14:41:41,146 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 14:41:41,146 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:41:41,146 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:41:41,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 14:41:41,147 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:41:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:41:41,147 INFO L82 PathProgramCache]: Analyzing trace with hash 840283623, now seen corresponding path program 2 times [2021-03-24 14:41:41,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:41:41,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432827457] [2021-03-24 14:41:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:41:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:41:41,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:41,346 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:41:41,422 INFO L142 QuantifierPusher]: treesize reduction 9309, result has 18.5 percent of original size [2021-03-24 14:41:41,443 INFO L147 QuantifierPusher]: treesize reduction 210, result has 90.1 percent of original size 1903 [2021-03-24 14:41:41,828 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 42 [2021-03-24 14:41:41,842 INFO L142 QuantifierPusher]: treesize reduction 1153, result has 24.2 percent of original size [2021-03-24 14:41:41,846 INFO L147 QuantifierPusher]: treesize reduction 8, result has 97.8 percent of original size 360 [2021-03-24 14:41:41,975 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 55 [2021-03-24 14:41:41,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:41,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 14:41:41,993 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 14:41:41,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432827457] [2021-03-24 14:41:41,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:41:41,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:41:41,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314355739] [2021-03-24 14:41:41,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:41:41,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:41:41,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:41:41,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:41:41,996 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:41:41,997 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 14:41:41,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:41:41,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:41:41,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:41:42,194 INFO L129 PetriNetUnfolder]: 2/29 cut-off events. [2021-03-24 14:41:42,195 INFO L130 PetriNetUnfolder]: For 24/26 co-relation queries the response was YES. [2021-03-24 14:41:42,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 29 events. 2/29 cut-off events. For 24/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 76 event pairs, 0 based on Foata normal form. 1/27 useless extension candidates. Maximal degree in co-relation 58. Up to 7 conditions per place. [2021-03-24 14:41:42,195 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 2 changer transitions 3/16 dead transitions. [2021-03-24 14:41:42,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 16 transitions, 85 flow [2021-03-24 14:41:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:41:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:41:42,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 14:41:42,197 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 14:41:42,197 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 14:41:42,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 14:41:42,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:41:42,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 14:41:42,198 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 14:41:42,199 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 14:41:42,199 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 14:41:42,200 INFO L185 Difference]: Start difference. First operand has 21 places, 11 transitions, 41 flow. Second operand 5 states and 79 transitions. [2021-03-24 14:41:42,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 16 transitions, 85 flow [2021-03-24 14:41:42,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 78 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-24 14:41:42,201 INFO L241 Difference]: Finished difference. Result has 25 places, 11 transitions, 51 flow [2021-03-24 14:41:42,201 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=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=51, PETRI_PLACES=25, PETRI_TRANSITIONS=11} [2021-03-24 14:41:42,202 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2021-03-24 14:41:42,202 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 11 transitions, 51 flow [2021-03-24 14:41:42,202 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 14:41:42,202 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:41:42,202 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:41:42,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 14:41:42,202 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:41:42,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:41:42,203 INFO L82 PathProgramCache]: Analyzing trace with hash -31273989, now seen corresponding path program 3 times [2021-03-24 14:41:42,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:41:42,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328123522] [2021-03-24 14:41:42,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:41:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:41:42,286 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:42,287 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:41:42,303 INFO L142 QuantifierPusher]: treesize reduction 2087, result has 23.9 percent of original size [2021-03-24 14:41:42,308 INFO L147 QuantifierPusher]: treesize reduction 87, result has 86.7 percent of original size 567 [2021-03-24 14:41:42,425 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 33 [2021-03-24 14:41:42,519 INFO L142 QuantifierPusher]: treesize reduction 17130, result has 13.3 percent of original size [2021-03-24 14:41:42,542 INFO L147 QuantifierPusher]: treesize reduction 1126, result has 57.2 percent of original size 1506 [2021-03-24 14:41:42,857 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 44 [2021-03-24 14:41:42,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:42,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-24 14:41:42,877 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 14:41:42,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328123522] [2021-03-24 14:41:42,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:41:42,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:41:42,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340044359] [2021-03-24 14:41:42,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:41:42,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:41:42,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:41:42,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:41:42,879 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:41:42,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 11 transitions, 51 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:42,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:41:42,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:41:42,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:41:43,047 INFO L129 PetriNetUnfolder]: 1/23 cut-off events. [2021-03-24 14:41:43,047 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-03-24 14:41:43,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 23 events. 1/23 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 1 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 56. Up to 5 conditions per place. [2021-03-24 14:41:43,048 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 5 selfloop transitions, 3 changer transitions 1/15 dead transitions. [2021-03-24 14:41:43,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 15 transitions, 93 flow [2021-03-24 14:41:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:41:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:41:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-24 14:41:43,049 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2021-03-24 14:41:43,049 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-24 14:41:43,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-24 14:41:43,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:41:43,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-24 14:41:43,050 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 14:41:43,051 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 14:41:43,051 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 14:41:43,051 INFO L185 Difference]: Start difference. First operand has 25 places, 11 transitions, 51 flow. Second operand 5 states and 79 transitions. [2021-03-24 14:41:43,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 15 transitions, 93 flow [2021-03-24 14:41:43,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 15 transitions, 74 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-03-24 14:41:43,053 INFO L241 Difference]: Finished difference. Result has 27 places, 12 transitions, 62 flow [2021-03-24 14:41:43,053 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=12} [2021-03-24 14:41:43,054 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2021-03-24 14:41:43,054 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 12 transitions, 62 flow [2021-03-24 14:41:43,054 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 14:41:43,054 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:41:43,054 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:41:43,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 14:41:43,054 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:41:43,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:41:43,055 INFO L82 PathProgramCache]: Analyzing trace with hash -15909717, now seen corresponding path program 4 times [2021-03-24 14:41:43,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:41:43,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001243637] [2021-03-24 14:41:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:41:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:41:43,106 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:43,106 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:41:43,176 INFO L142 QuantifierPusher]: treesize reduction 28251, result has 4.0 percent of original size [2021-03-24 14:41:43,184 INFO L147 QuantifierPusher]: treesize reduction 268, result has 77.2 percent of original size 910 [2021-03-24 14:41:43,398 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 37 [2021-03-24 14:41:43,414 INFO L142 QuantifierPusher]: treesize reduction 1157, result has 16.3 percent of original size [2021-03-24 14:41:43,416 INFO L147 QuantifierPusher]: treesize reduction 95, result has 57.8 percent of original size 130 [2021-03-24 14:41:43,492 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:43,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-24 14:41:43,510 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 14:41:43,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001243637] [2021-03-24 14:41:43,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:41:43,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:41:43,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229576378] [2021-03-24 14:41:43,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:41:43,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:41:43,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:41:43,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:41:43,512 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:41:43,512 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 12 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:43,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:41:43,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:41:43,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:41:43,654 INFO L129 PetriNetUnfolder]: 1/20 cut-off events. [2021-03-24 14:41:43,654 INFO L130 PetriNetUnfolder]: For 34/37 co-relation queries the response was YES. [2021-03-24 14:41:43,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 20 events. 1/20 cut-off events. For 34/37 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 32 event pairs, 1 based on Foata normal form. 1/20 useless extension candidates. Maximal degree in co-relation 55. Up to 5 conditions per place. [2021-03-24 14:41:43,655 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 4/14 dead transitions. [2021-03-24 14:41:43,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 14 transitions, 92 flow [2021-03-24 14:41:43,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:41:43,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:41:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2021-03-24 14:41:43,656 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6782608695652174 [2021-03-24 14:41:43,656 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2021-03-24 14:41:43,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2021-03-24 14:41:43,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:41:43,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2021-03-24 14:41:43,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:43,658 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 14:41:43,658 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 14:41:43,658 INFO L185 Difference]: Start difference. First operand has 27 places, 12 transitions, 62 flow. Second operand 5 states and 78 transitions. [2021-03-24 14:41:43,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 14 transitions, 92 flow [2021-03-24 14:41:43,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 14 transitions, 88 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-24 14:41:43,660 INFO L241 Difference]: Finished difference. Result has 30 places, 10 transitions, 49 flow [2021-03-24 14:41:43,660 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=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=30, PETRI_TRANSITIONS=10} [2021-03-24 14:41:43,660 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2021-03-24 14:41:43,660 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 10 transitions, 49 flow [2021-03-24 14:41:43,661 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 14:41:43,661 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:41:43,661 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:41:43,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 14:41:43,661 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:41:43,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:41:43,662 INFO L82 PathProgramCache]: Analyzing trace with hash 815259183, now seen corresponding path program 5 times [2021-03-24 14:41:43,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:41:43,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522712975] [2021-03-24 14:41:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:41:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:41:43,724 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:43,724 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:41:43,769 INFO L142 QuantifierPusher]: treesize reduction 9869, result has 16.3 percent of original size [2021-03-24 14:41:43,783 INFO L147 QuantifierPusher]: treesize reduction 292, result has 84.8 percent of original size 1635 [2021-03-24 14:41:44,202 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 55 [2021-03-24 14:41:44,224 INFO L142 QuantifierPusher]: treesize reduction 1255, result has 46.0 percent of original size [2021-03-24 14:41:44,230 INFO L147 QuantifierPusher]: treesize reduction 205, result has 80.9 percent of original size 866 [2021-03-24 14:41:44,425 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 48 [2021-03-24 14:41:44,426 INFO L142 QuantifierPusher]: treesize reduction 16, result has 59.0 percent of original size [2021-03-24 14:41:44,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 14:41:44,444 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 14:41:44,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522712975] [2021-03-24 14:41:44,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:41:44,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:41:44,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075523424] [2021-03-24 14:41:44,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:41:44,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:41:44,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:41:44,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:41:44,446 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:41:44,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 10 transitions, 49 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:44,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:41:44,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:41:44,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:41:44,695 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2021-03-24 14:41:44,979 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-03-24 14:41:44,987 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-24 14:41:44,987 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-24 14:41:44,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 16 events. 0/16 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 1/16 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-24 14:41:44,988 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 3 selfloop transitions, 1 changer transitions 2/12 dead transitions. [2021-03-24 14:41:44,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 12 transitions, 80 flow [2021-03-24 14:41:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:41:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:41:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-03-24 14:41:44,990 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2021-03-24 14:41:44,991 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-03-24 14:41:44,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-03-24 14:41:44,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:41:44,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-03-24 14:41:44,991 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 14:41:44,992 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 14:41:44,992 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 14:41:44,992 INFO L185 Difference]: Start difference. First operand has 30 places, 10 transitions, 49 flow. Second operand 5 states and 77 transitions. [2021-03-24 14:41:44,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 12 transitions, 80 flow [2021-03-24 14:41:44,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 47 flow, removed 5 selfloop flow, removed 11 redundant places. [2021-03-24 14:41:44,993 INFO L241 Difference]: Finished difference. Result has 23 places, 10 transitions, 35 flow [2021-03-24 14:41:44,993 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=35, PETRI_PLACES=23, PETRI_TRANSITIONS=10} [2021-03-24 14:41:44,993 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2021-03-24 14:41:44,994 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 10 transitions, 35 flow [2021-03-24 14:41:44,994 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 14:41:44,994 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:41:44,994 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:41:44,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 14:41:44,994 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:41:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:41:44,994 INFO L82 PathProgramCache]: Analyzing trace with hash -902489877, now seen corresponding path program 6 times [2021-03-24 14:41:44,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:41:44,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789660522] [2021-03-24 14:41:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:41:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:41:45,039 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:45,040 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:41:45,107 INFO L142 QuantifierPusher]: treesize reduction 26229, result has 10.9 percent of original size [2021-03-24 14:41:45,115 INFO L147 QuantifierPusher]: treesize reduction 2229, result has 30.4 percent of original size 973 [2021-03-24 14:41:45,355 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 38 [2021-03-24 14:41:45,361 INFO L142 QuantifierPusher]: treesize reduction 1150, result has 16.8 percent of original size [2021-03-24 14:41:45,363 INFO L147 QuantifierPusher]: treesize reduction 87, result has 62.5 percent of original size 145 [2021-03-24 14:41:45,472 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2021-03-24 14:41:45,474 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:41:45,474 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-03-24 14:41:45,492 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 14:41:45,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789660522] [2021-03-24 14:41:45,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:41:45,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 14:41:45,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205896085] [2021-03-24 14:41:45,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 14:41:45,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:41:45,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 14:41:45,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 14:41:45,498 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 14:41:45,498 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 10 transitions, 35 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 14:41:45,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:41:45,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 14:41:45,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:41:45,640 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-24 14:41:45,640 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-24 14:41:45,641 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 10 events. 0/10 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 14:41:45,641 INFO L132 encePairwiseOnDemand]: 19/23 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-03-24 14:41:45,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 10 transitions, 44 flow [2021-03-24 14:41:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 14:41:45,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 14:41:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-03-24 14:41:45,642 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2021-03-24 14:41:45,642 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-03-24 14:41:45,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-03-24 14:41:45,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:41:45,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-03-24 14:41:45,642 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 14:41:45,643 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 14:41:45,643 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 14:41:45,643 INFO L185 Difference]: Start difference. First operand has 23 places, 10 transitions, 35 flow. Second operand 5 states and 75 transitions. [2021-03-24 14:41:45,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 10 transitions, 44 flow [2021-03-24 14:41:45,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 10 transitions, 40 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-24 14:41:45,644 INFO L241 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2021-03-24 14:41:45,644 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 14:41:45,644 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2021-03-24 14:41:45,644 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2021-03-24 14:41:45,644 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 14:41:45,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 14:41:45,650 INFO L202 PluginConnector]: Adding new model container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 02:41:45 BasicIcfg [2021-03-24 14:41:45,650 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 14:41:45,652 INFO L168 Benchmark]: Toolchain (without parser) took 6745.28 ms. Allocated memory was 255.9 MB in the beginning and 549.5 MB in the end (delta: 293.6 MB). Free memory was 236.3 MB in the beginning and 236.6 MB in the end (delta: -284.0 kB). Peak memory consumption was 295.0 MB. Max. memory is 16.0 GB. [2021-03-24 14:41:45,652 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 178.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 14:41:45,653 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.64 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 14:41:45,657 INFO L168 Benchmark]: Boogie Preprocessor took 19.17 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 233.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 14:41:45,660 INFO L168 Benchmark]: RCFGBuilder took 346.45 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 233.2 MB in the end (delta: 634.7 kB). Peak memory consumption was 22.0 MB. Max. memory is 16.0 GB. [2021-03-24 14:41:45,660 INFO L168 Benchmark]: TraceAbstraction took 6348.09 ms. Allocated memory was 255.9 MB in the beginning and 549.5 MB in the end (delta: 293.6 MB). Free memory was 233.2 MB in the beginning and 236.6 MB in the end (delta: -3.4 MB). Peak memory consumption was 289.8 MB. Max. memory is 16.0 GB. [2021-03-24 14:41:45,662 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 178.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.64 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.17 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 233.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 346.45 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 233.2 MB in the end (delta: 634.7 kB). Peak memory consumption was 22.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 6348.09 ms. Allocated memory was 255.9 MB in the beginning and 549.5 MB in the end (delta: 293.6 MB). Free memory was 233.2 MB in the beginning and 236.6 MB in the end (delta: -3.4 MB). Peak memory consumption was 289.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 129.2ms, 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: 3.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 6258.3ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1564.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 178.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 118.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4047.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=3, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.2ms SsaConstructionTime, 191.9ms SatisfiabilityAnalysisTime, 4181.0ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1815 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...