/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-12 00:10:55,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-12 00:10:55,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-12 00:10:55,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-12 00:10:55,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-12 00:10:55,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-12 00:10:55,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-12 00:10:55,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-12 00:10:55,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-12 00:10:55,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-12 00:10:55,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-12 00:10:55,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-12 00:10:55,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-12 00:10:55,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-12 00:10:55,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-12 00:10:55,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-12 00:10:55,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-12 00:10:55,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-12 00:10:55,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-12 00:10:55,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-12 00:10:55,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-12 00:10:55,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-12 00:10:55,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-12 00:10:55,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-12 00:10:55,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-12 00:10:55,158 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-12 00:10:55,193 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-12 00:10:55,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-12 00:10:55,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-12 00:10:55,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-12 00:10:55,197 INFO L138 SettingsManager]: * Use SBE=true [2021-03-12 00:10:55,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-12 00:10:55,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-12 00:10:55,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-12 00:10:55,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-12 00:10:55,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-12 00:10:55,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-12 00:10:55,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-12 00:10:55,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-12 00:10:55,199 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-12 00:10:55,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-12 00:10:55,199 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-12 00:10:55,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-12 00:10:55,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-12 00:10:55,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-12 00:10:55,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-12 00:10:55,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-12 00:10:55,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-12 00:10:55,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-12 00:10:55,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-12 00:10:55,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-12 00:10:55,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-12 00:10:55,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-12 00:10:55,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-12 00:10:55,201 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-12 00:10:55,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-12 00:10:55,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-12 00:10:55,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-12 00:10:55,517 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-12 00:10:55,518 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-12 00:10:55,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl [2021-03-12 00:10:55,524 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl' [2021-03-12 00:10:55,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-12 00:10:55,555 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-12 00:10:55,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-12 00:10:55,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-12 00:10:55,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-12 00:10:55,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:10:55" (1/1) ... [2021-03-12 00:10:55,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:10:55" (1/1) ... [2021-03-12 00:10:55,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-12 00:10:55,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-12 00:10:55,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-12 00:10:55,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-12 00:10:55,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:10:55" (1/1) ... [2021-03-12 00:10:55,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:10:55" (1/1) ... [2021-03-12 00:10:55,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:10:55" (1/1) ... [2021-03-12 00:10:55,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:10:55" (1/1) ... [2021-03-12 00:10:55,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:10:55" (1/1) ... [2021-03-12 00:10:55,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:10:55" (1/1) ... [2021-03-12 00:10:55,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:10:55" (1/1) ... [2021-03-12 00:10:55,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-12 00:10:55,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-12 00:10:55,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-12 00:10:55,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-12 00:10:55,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:10:55" (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 [2021-03-12 00:10:55,656 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-12 00:10:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-12 00:10:55,657 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-12 00:10:55,657 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-12 00:10:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-12 00:10:55,657 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-12 00:10:55,657 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-12 00:10:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-12 00:10:55,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-12 00:10:55,658 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-12 00:10:55,798 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-12 00:10:55,798 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-12 00:10:55,799 INFO L202 PluginConnector]: Adding new model bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.03 12:10:55 BoogieIcfgContainer [2021-03-12 00:10:55,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-12 00:10:55,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-12 00:10:55,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-12 00:10:55,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-12 00:10:55,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:10:55" (1/2) ... [2021-03-12 00:10:55,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4e7a39 and model type bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.03 12:10:55, skipping insertion in model container [2021-03-12 00:10:55,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.03 12:10:55" (2/2) ... [2021-03-12 00:10:55,804 INFO L111 eAbstractionObserver]: Analyzing ICFG bakery-2.wvr.bpl [2021-03-12 00:10:55,808 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-12 00:10:55,811 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-12 00:10:55,812 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-12 00:10:55,837 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-12 00:10:55,851 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-12 00:10:55,868 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-12 00:10:55,868 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-12 00:10:55,869 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-12 00:10:55,869 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-12 00:10:55,869 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-12 00:10:55,869 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-12 00:10:55,869 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-12 00:10:55,869 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-12 00:10:55,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 78 flow [2021-03-12 00:10:55,897 INFO L129 PetriNetUnfolder]: 0/29 cut-off events. [2021-03-12 00:10:55,897 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-12 00:10:55,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 29 events. 0/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-12 00:10:55,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 78 flow [2021-03-12 00:10:55,902 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 27 transitions, 66 flow [2021-03-12 00:10:55,904 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-12 00:10:55,912 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 34 places, 27 transitions, 66 flow [2021-03-12 00:10:55,915 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 34 places, 27 transitions, 66 flow [2021-03-12 00:10:55,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 34 places, 27 transitions, 66 flow [2021-03-12 00:10:55,924 INFO L129 PetriNetUnfolder]: 0/27 cut-off events. [2021-03-12 00:10:55,924 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-12 00:10:55,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 0/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-12 00:10:55,925 INFO L116 LiptonReduction]: Number of co-enabled transitions 240 [2021-03-12 00:10:56,210 INFO L131 LiptonReduction]: Checked pairs total: 523 [2021-03-12 00:10:56,210 INFO L133 LiptonReduction]: Total number of compositions: 7 [2021-03-12 00:10:56,211 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 309 [2021-03-12 00:10:56,222 INFO L129 PetriNetUnfolder]: 0/19 cut-off events. [2021-03-12 00:10:56,222 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-12 00:10:56,222 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:10:56,227 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:10:56,227 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:10:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:10:56,232 INFO L82 PathProgramCache]: Analyzing trace with hash -320643293, now seen corresponding path program 1 times [2021-03-12 00:10:56,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:10:56,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662611760] [2021-03-12 00:10:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:10:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:10:56,425 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,426 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:56,439 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,441 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:56,449 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,450 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:56,460 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,461 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:56,480 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-12 00:10:56,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:10:56,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662611760] [2021-03-12 00:10:56,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:10:56,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:10:56,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966538264] [2021-03-12 00:10:56,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:10:56,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:10:56,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:10:56,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:10:56,517 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 38 [2021-03-12 00:10:56,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 30.857142857142858) internal successors, (216), 7 states have internal predecessors, (216), 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) [2021-03-12 00:10:56,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:10:56,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 38 [2021-03-12 00:10:56,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:10:56,628 INFO L129 PetriNetUnfolder]: 1/44 cut-off events. [2021-03-12 00:10:56,628 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-03-12 00:10:56,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 44 events. 1/44 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 115 event pairs, 0 based on Foata normal form. 1/44 useless extension candidates. Maximal degree in co-relation 52. Up to 5 conditions per place. [2021-03-12 00:10:56,632 INFO L132 encePairwiseOnDemand]: 32/38 looper letters, 7 selfloop transitions, 7 changer transitions 2/30 dead transitions. [2021-03-12 00:10:56,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 104 flow [2021-03-12 00:10:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:10:56,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:10:56,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2021-03-12 00:10:56,648 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8453947368421053 [2021-03-12 00:10:56,649 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 257 transitions. [2021-03-12 00:10:56,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 257 transitions. [2021-03-12 00:10:56,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:10:56,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 257 transitions. [2021-03-12 00:10:56,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 32.125) internal successors, (257), 8 states have internal predecessors, (257), 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) [2021-03-12 00:10:56,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 38.0) internal successors, (342), 9 states have internal predecessors, (342), 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) [2021-03-12 00:10:56,664 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 38.0) internal successors, (342), 9 states have internal predecessors, (342), 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) [2021-03-12 00:10:56,666 INFO L185 Difference]: Start difference. First operand has 27 places, 20 transitions, 52 flow. Second operand 8 states and 257 transitions. [2021-03-12 00:10:56,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 104 flow [2021-03-12 00:10:56,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 96 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-12 00:10:56,670 INFO L241 Difference]: Finished difference. Result has 33 places, 25 transitions, 82 flow [2021-03-12 00:10:56,672 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=82, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2021-03-12 00:10:56,673 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2021-03-12 00:10:56,673 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 82 flow [2021-03-12 00:10:56,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 30.857142857142858) internal successors, (216), 7 states have internal predecessors, (216), 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) [2021-03-12 00:10:56,673 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:10:56,673 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:10:56,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-12 00:10:56,674 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:10:56,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:10:56,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1571498559, now seen corresponding path program 2 times [2021-03-12 00:10:56,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:10:56,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901326568] [2021-03-12 00:10:56,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:10:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:10:56,705 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:56,711 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:56,717 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,718 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:56,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:56,734 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-12 00:10:56,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:10:56,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901326568] [2021-03-12 00:10:56,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:10:56,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:10:56,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465090905] [2021-03-12 00:10:56,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:10:56,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:10:56,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:10:56,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:10:56,748 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 38 [2021-03-12 00:10:56,748 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 30.857142857142858) internal successors, (216), 7 states have internal predecessors, (216), 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) [2021-03-12 00:10:56,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:10:56,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 38 [2021-03-12 00:10:56,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:10:56,823 INFO L129 PetriNetUnfolder]: 1/38 cut-off events. [2021-03-12 00:10:56,823 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-03-12 00:10:56,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 38 events. 1/38 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 75 event pairs, 0 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 68. Up to 5 conditions per place. [2021-03-12 00:10:56,824 INFO L132 encePairwiseOnDemand]: 32/38 looper letters, 4 selfloop transitions, 6 changer transitions 4/28 dead transitions. [2021-03-12 00:10:56,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 28 transitions, 124 flow [2021-03-12 00:10:56,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:10:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:10:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 254 transitions. [2021-03-12 00:10:56,826 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8355263157894737 [2021-03-12 00:10:56,826 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 254 transitions. [2021-03-12 00:10:56,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 254 transitions. [2021-03-12 00:10:56,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:10:56,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 254 transitions. [2021-03-12 00:10:56,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 31.75) internal successors, (254), 8 states have internal predecessors, (254), 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) [2021-03-12 00:10:56,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 38.0) internal successors, (342), 9 states have internal predecessors, (342), 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) [2021-03-12 00:10:56,829 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 38.0) internal successors, (342), 9 states have internal predecessors, (342), 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) [2021-03-12 00:10:56,829 INFO L185 Difference]: Start difference. First operand has 33 places, 25 transitions, 82 flow. Second operand 8 states and 254 transitions. [2021-03-12 00:10:56,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 28 transitions, 124 flow [2021-03-12 00:10:56,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 28 transitions, 120 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-03-12 00:10:56,831 INFO L241 Difference]: Finished difference. Result has 38 places, 22 transitions, 81 flow [2021-03-12 00:10:56,831 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=81, PETRI_PLACES=38, PETRI_TRANSITIONS=22} [2021-03-12 00:10:56,832 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 11 predicate places. [2021-03-12 00:10:56,832 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 22 transitions, 81 flow [2021-03-12 00:10:56,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 30.857142857142858) internal successors, (216), 7 states have internal predecessors, (216), 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) [2021-03-12 00:10:56,832 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:10:56,832 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:10:56,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-12 00:10:56,833 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:10:56,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:10:56,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1632564061, now seen corresponding path program 3 times [2021-03-12 00:10:56,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:10:56,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145700805] [2021-03-12 00:10:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:10:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:10:56,866 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,867 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:56,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:56,873 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-12 00:10:56,880 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-03-12 00:10:56,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:56,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-12 00:10:56,900 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,900 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:10:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:10:56,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145700805] [2021-03-12 00:10:56,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:10:56,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:10:56,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001922219] [2021-03-12 00:10:56,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:10:56,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:10:56,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:10:56,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:10:56,903 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 38 [2021-03-12 00:10:56,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 22 transitions, 81 flow. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 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) [2021-03-12 00:10:56,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:10:56,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 38 [2021-03-12 00:10:56,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:10:56,948 INFO L129 PetriNetUnfolder]: 15/83 cut-off events. [2021-03-12 00:10:56,948 INFO L130 PetriNetUnfolder]: For 9/10 co-relation queries the response was YES. [2021-03-12 00:10:56,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 83 events. 15/83 cut-off events. For 9/10 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 283 event pairs, 3 based on Foata normal form. 2/84 useless extension candidates. Maximal degree in co-relation 166. Up to 25 conditions per place. [2021-03-12 00:10:56,950 INFO L132 encePairwiseOnDemand]: 32/38 looper letters, 12 selfloop transitions, 5 changer transitions 4/34 dead transitions. [2021-03-12 00:10:56,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 147 flow [2021-03-12 00:10:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:10:56,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:10:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2021-03-12 00:10:56,951 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6754385964912281 [2021-03-12 00:10:56,951 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 154 transitions. [2021-03-12 00:10:56,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 154 transitions. [2021-03-12 00:10:56,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:10:56,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 154 transitions. [2021-03-12 00:10:56,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 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) [2021-03-12 00:10:56,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 38.0) internal successors, (266), 7 states have internal predecessors, (266), 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) [2021-03-12 00:10:56,953 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 38.0) internal successors, (266), 7 states have internal predecessors, (266), 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) [2021-03-12 00:10:56,953 INFO L185 Difference]: Start difference. First operand has 38 places, 22 transitions, 81 flow. Second operand 6 states and 154 transitions. [2021-03-12 00:10:56,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 147 flow [2021-03-12 00:10:56,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 124 flow, removed 2 selfloop flow, removed 10 redundant places. [2021-03-12 00:10:56,955 INFO L241 Difference]: Finished difference. Result has 34 places, 25 transitions, 89 flow [2021-03-12 00:10:56,955 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2021-03-12 00:10:56,955 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2021-03-12 00:10:56,955 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 89 flow [2021-03-12 00:10:56,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 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) [2021-03-12 00:10:56,956 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:10:56,956 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:10:56,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-12 00:10:56,956 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:10:56,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:10:56,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1273978609, now seen corresponding path program 4 times [2021-03-12 00:10:56,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:10:56,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120187570] [2021-03-12 00:10:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:10:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:10:56,968 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,968 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:10:56,968 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:10:56,971 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:56,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:10:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:10:56,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120187570] [2021-03-12 00:10:56,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:10:56,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-12 00:10:56,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106465369] [2021-03-12 00:10:56,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-12 00:10:56,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:10:56,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-12 00:10:56,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-12 00:10:56,973 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 38 [2021-03-12 00:10:56,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-03-12 00:10:56,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:10:56,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 38 [2021-03-12 00:10:56,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:10:56,983 INFO L129 PetriNetUnfolder]: 2/47 cut-off events. [2021-03-12 00:10:56,983 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-12 00:10:56,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 47 events. 2/47 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 119 event pairs, 0 based on Foata normal form. 1/48 useless extension candidates. Maximal degree in co-relation 31. Up to 9 conditions per place. [2021-03-12 00:10:56,987 INFO L132 encePairwiseOnDemand]: 35/38 looper letters, 2 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2021-03-12 00:10:56,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 25 transitions, 99 flow [2021-03-12 00:10:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 00:10:56,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-12 00:10:56,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2021-03-12 00:10:56,988 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8596491228070176 [2021-03-12 00:10:56,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2021-03-12 00:10:56,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2021-03-12 00:10:56,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:10:56,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2021-03-12 00:10:56,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:10:56,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-03-12 00:10:56,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-03-12 00:10:56,990 INFO L185 Difference]: Start difference. First operand has 34 places, 25 transitions, 89 flow. Second operand 3 states and 98 transitions. [2021-03-12 00:10:56,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 25 transitions, 99 flow [2021-03-12 00:10:56,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 25 transitions, 94 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-12 00:10:56,992 INFO L241 Difference]: Finished difference. Result has 33 places, 25 transitions, 95 flow [2021-03-12 00:10:56,993 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2021-03-12 00:10:56,993 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2021-03-12 00:10:56,995 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 95 flow [2021-03-12 00:10:56,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-03-12 00:10:56,996 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:10:56,996 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:10:56,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-12 00:10:56,996 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:10:56,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:10:56,996 INFO L82 PathProgramCache]: Analyzing trace with hash -838455509, now seen corresponding path program 5 times [2021-03-12 00:10:56,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:10:56,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025476245] [2021-03-12 00:10:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:10:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:10:57,053 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,054 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-12 00:10:57,063 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,064 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-12 00:10:57,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,067 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-12 00:10:57,070 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,070 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-12 00:10:57,079 INFO L142 QuantifierPusher]: treesize reduction 9, result has 57.1 percent of original size [2021-03-12 00:10:57,080 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-12 00:10:57,089 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,089 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:10:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:10:57,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025476245] [2021-03-12 00:10:57,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:10:57,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-12 00:10:57,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517436645] [2021-03-12 00:10:57,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-12 00:10:57,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:10:57,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-12 00:10:57,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-12 00:10:57,096 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 38 [2021-03-12 00:10:57,096 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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) [2021-03-12 00:10:57,096 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:10:57,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 38 [2021-03-12 00:10:57,096 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:10:57,136 INFO L129 PetriNetUnfolder]: 7/56 cut-off events. [2021-03-12 00:10:57,137 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2021-03-12 00:10:57,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 56 events. 7/56 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 135 event pairs, 5 based on Foata normal form. 2/57 useless extension candidates. Maximal degree in co-relation 83. Up to 21 conditions per place. [2021-03-12 00:10:57,138 INFO L132 encePairwiseOnDemand]: 34/38 looper letters, 8 selfloop transitions, 2 changer transitions 4/27 dead transitions. [2021-03-12 00:10:57,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 27 transitions, 125 flow [2021-03-12 00:10:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-12 00:10:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-12 00:10:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2021-03-12 00:10:57,139 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2021-03-12 00:10:57,139 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 125 transitions. [2021-03-12 00:10:57,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 125 transitions. [2021-03-12 00:10:57,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:10:57,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 125 transitions. [2021-03-12 00:10:57,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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) [2021-03-12 00:10:57,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 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) [2021-03-12 00:10:57,140 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 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) [2021-03-12 00:10:57,141 INFO L185 Difference]: Start difference. First operand has 33 places, 25 transitions, 95 flow. Second operand 5 states and 125 transitions. [2021-03-12 00:10:57,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 27 transitions, 125 flow [2021-03-12 00:10:57,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 27 transitions, 117 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-12 00:10:57,144 INFO L241 Difference]: Finished difference. Result has 36 places, 22 transitions, 76 flow [2021-03-12 00:10:57,144 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=22} [2021-03-12 00:10:57,144 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2021-03-12 00:10:57,144 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 22 transitions, 76 flow [2021-03-12 00:10:57,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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) [2021-03-12 00:10:57,145 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:10:57,145 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:10:57,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-12 00:10:57,145 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:10:57,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:10:57,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1492512135, now seen corresponding path program 6 times [2021-03-12 00:10:57,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:10:57,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223577639] [2021-03-12 00:10:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:10:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:10:57,171 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,172 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:10:57,172 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:10:57,175 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,176 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:10:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:10:57,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223577639] [2021-03-12 00:10:57,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:10:57,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-12 00:10:57,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996754263] [2021-03-12 00:10:57,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-12 00:10:57,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:10:57,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-12 00:10:57,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-12 00:10:57,178 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 38 [2021-03-12 00:10:57,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 22 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-03-12 00:10:57,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:10:57,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 38 [2021-03-12 00:10:57,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:10:57,190 INFO L129 PetriNetUnfolder]: 1/33 cut-off events. [2021-03-12 00:10:57,190 INFO L130 PetriNetUnfolder]: For 4/5 co-relation queries the response was YES. [2021-03-12 00:10:57,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 33 events. 1/33 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 1 based on Foata normal form. 2/35 useless extension candidates. Maximal degree in co-relation 50. Up to 6 conditions per place. [2021-03-12 00:10:57,192 INFO L132 encePairwiseOnDemand]: 35/38 looper letters, 2 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2021-03-12 00:10:57,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 22 transitions, 84 flow [2021-03-12 00:10:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 00:10:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-12 00:10:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2021-03-12 00:10:57,193 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8596491228070176 [2021-03-12 00:10:57,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2021-03-12 00:10:57,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2021-03-12 00:10:57,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:10:57,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2021-03-12 00:10:57,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:10:57,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-03-12 00:10:57,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-03-12 00:10:57,195 INFO L185 Difference]: Start difference. First operand has 36 places, 22 transitions, 76 flow. Second operand 3 states and 98 transitions. [2021-03-12 00:10:57,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 22 transitions, 84 flow [2021-03-12 00:10:57,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 22 transitions, 70 flow, removed 3 selfloop flow, removed 6 redundant places. [2021-03-12 00:10:57,198 INFO L241 Difference]: Finished difference. Result has 30 places, 22 transitions, 70 flow [2021-03-12 00:10:57,198 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=30, PETRI_TRANSITIONS=22} [2021-03-12 00:10:57,198 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2021-03-12 00:10:57,198 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 70 flow [2021-03-12 00:10:57,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-03-12 00:10:57,199 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:10:57,199 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:10:57,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-12 00:10:57,199 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:10:57,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:10:57,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1607147407, now seen corresponding path program 7 times [2021-03-12 00:10:57,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:10:57,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910953030] [2021-03-12 00:10:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:10:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:10:57,247 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:57,256 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,256 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:57,257 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,258 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-12 00:10:57,268 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-03-12 00:10:57,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:57,281 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,282 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-12 00:10:57,289 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:10:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:10:57,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910953030] [2021-03-12 00:10:57,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:10:57,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:10:57,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121728157] [2021-03-12 00:10:57,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:10:57,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:10:57,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:10:57,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:10:57,296 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 38 [2021-03-12 00:10:57,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 70 flow. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 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) [2021-03-12 00:10:57,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:10:57,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 38 [2021-03-12 00:10:57,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:10:57,340 INFO L129 PetriNetUnfolder]: 6/50 cut-off events. [2021-03-12 00:10:57,341 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-03-12 00:10:57,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 50 events. 6/50 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 108 event pairs, 3 based on Foata normal form. 3/51 useless extension candidates. Maximal degree in co-relation 47. Up to 12 conditions per place. [2021-03-12 00:10:57,341 INFO L132 encePairwiseOnDemand]: 31/38 looper letters, 6 selfloop transitions, 4 changer transitions 4/27 dead transitions. [2021-03-12 00:10:57,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 27 transitions, 116 flow [2021-03-12 00:10:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:10:57,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:10:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2021-03-12 00:10:57,343 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6491228070175439 [2021-03-12 00:10:57,343 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 148 transitions. [2021-03-12 00:10:57,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 148 transitions. [2021-03-12 00:10:57,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:10:57,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 148 transitions. [2021-03-12 00:10:57,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 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) [2021-03-12 00:10:57,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 38.0) internal successors, (266), 7 states have internal predecessors, (266), 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) [2021-03-12 00:10:57,344 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 38.0) internal successors, (266), 7 states have internal predecessors, (266), 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) [2021-03-12 00:10:57,344 INFO L185 Difference]: Start difference. First operand has 30 places, 22 transitions, 70 flow. Second operand 6 states and 148 transitions. [2021-03-12 00:10:57,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 27 transitions, 116 flow [2021-03-12 00:10:57,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-12 00:10:57,345 INFO L241 Difference]: Finished difference. Result has 36 places, 22 transitions, 82 flow [2021-03-12 00:10:57,346 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=82, PETRI_PLACES=36, PETRI_TRANSITIONS=22} [2021-03-12 00:10:57,346 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2021-03-12 00:10:57,346 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 22 transitions, 82 flow [2021-03-12 00:10:57,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 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) [2021-03-12 00:10:57,346 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:10:57,346 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:10:57,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-12 00:10:57,346 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:10:57,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:10:57,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1406484903, now seen corresponding path program 8 times [2021-03-12 00:10:57,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:10:57,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620456811] [2021-03-12 00:10:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:10:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:10:57,380 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-12 00:10:57,394 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,394 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-12 00:10:57,405 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:57,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:57,427 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:57,436 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,437 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-12 00:10:57,445 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,446 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:10:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:10:57,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620456811] [2021-03-12 00:10:57,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:10:57,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:10:57,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919128159] [2021-03-12 00:10:57,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:10:57,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:10:57,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:10:57,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:10:57,448 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 38 [2021-03-12 00:10:57,449 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 22 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 23.125) internal successors, (185), 8 states have internal predecessors, (185), 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) [2021-03-12 00:10:57,449 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:10:57,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 38 [2021-03-12 00:10:57,449 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:10:57,524 INFO L129 PetriNetUnfolder]: 1/45 cut-off events. [2021-03-12 00:10:57,524 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2021-03-12 00:10:57,524 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 45 events. 1/45 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 94 event pairs, 1 based on Foata normal form. 1/46 useless extension candidates. Maximal degree in co-relation 45. Up to 5 conditions per place. [2021-03-12 00:10:57,525 INFO L132 encePairwiseOnDemand]: 31/38 looper letters, 3 selfloop transitions, 8 changer transitions 1/25 dead transitions. [2021-03-12 00:10:57,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 25 transitions, 116 flow [2021-03-12 00:10:57,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:10:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:10:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2021-03-12 00:10:57,526 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6217105263157895 [2021-03-12 00:10:57,526 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 189 transitions. [2021-03-12 00:10:57,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 189 transitions. [2021-03-12 00:10:57,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:10:57,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 189 transitions. [2021-03-12 00:10:57,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 23.625) internal successors, (189), 8 states have internal predecessors, (189), 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) [2021-03-12 00:10:57,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 38.0) internal successors, (342), 9 states have internal predecessors, (342), 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) [2021-03-12 00:10:57,528 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 38.0) internal successors, (342), 9 states have internal predecessors, (342), 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) [2021-03-12 00:10:57,528 INFO L185 Difference]: Start difference. First operand has 36 places, 22 transitions, 82 flow. Second operand 8 states and 189 transitions. [2021-03-12 00:10:57,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 25 transitions, 116 flow [2021-03-12 00:10:57,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 25 transitions, 98 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-03-12 00:10:57,529 INFO L241 Difference]: Finished difference. Result has 37 places, 24 transitions, 93 flow [2021-03-12 00:10:57,529 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=93, PETRI_PLACES=37, PETRI_TRANSITIONS=24} [2021-03-12 00:10:57,529 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2021-03-12 00:10:57,530 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 24 transitions, 93 flow [2021-03-12 00:10:57,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 23.125) internal successors, (185), 8 states have internal predecessors, (185), 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) [2021-03-12 00:10:57,530 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:10:57,530 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:10:57,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-12 00:10:57,530 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:10:57,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:10:57,530 INFO L82 PathProgramCache]: Analyzing trace with hash 602069981, now seen corresponding path program 9 times [2021-03-12 00:10:57,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:10:57,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972175799] [2021-03-12 00:10:57,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:10:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:10:57,544 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,544 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-12 00:10:57,555 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,555 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-12 00:10:57,564 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:57,572 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:57,583 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,583 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:10:57,592 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-03-12 00:10:57,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-12 00:10:57,600 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:10:57,600 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:10:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:10:57,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972175799] [2021-03-12 00:10:57,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:10:57,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:10:57,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481288575] [2021-03-12 00:10:57,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:10:57,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:10:57,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:10:57,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:10:57,602 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 38 [2021-03-12 00:10:57,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 24 transitions, 93 flow. Second operand has 8 states, 8 states have (on average 23.125) internal successors, (185), 8 states have internal predecessors, (185), 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) [2021-03-12 00:10:57,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:10:57,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 38 [2021-03-12 00:10:57,603 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:10:57,636 INFO L129 PetriNetUnfolder]: 1/17 cut-off events. [2021-03-12 00:10:57,636 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-03-12 00:10:57,636 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 17 events. 1/17 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 1 based on Foata normal form. 1/18 useless extension candidates. Maximal degree in co-relation 34. Up to 5 conditions per place. [2021-03-12 00:10:57,636 INFO L132 encePairwiseOnDemand]: 33/38 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-03-12 00:10:57,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 13 transitions, 64 flow [2021-03-12 00:10:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 00:10:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-12 00:10:57,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2021-03-12 00:10:57,638 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6090225563909775 [2021-03-12 00:10:57,638 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 162 transitions. [2021-03-12 00:10:57,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 162 transitions. [2021-03-12 00:10:57,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:10:57,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 162 transitions. [2021-03-12 00:10:57,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 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) [2021-03-12 00:10:57,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 38.0) internal successors, (304), 8 states have internal predecessors, (304), 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) [2021-03-12 00:10:57,640 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 38.0) internal successors, (304), 8 states have internal predecessors, (304), 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) [2021-03-12 00:10:57,640 INFO L185 Difference]: Start difference. First operand has 37 places, 24 transitions, 93 flow. Second operand 7 states and 162 transitions. [2021-03-12 00:10:57,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 13 transitions, 64 flow [2021-03-12 00:10:57,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 13 transitions, 59 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-12 00:10:57,640 INFO L241 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2021-03-12 00:10:57,641 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=29, PETRI_TRANSITIONS=0} [2021-03-12 00:10:57,641 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2021-03-12 00:10:57,641 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2021-03-12 00:10:57,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 23.125) internal successors, (185), 8 states have internal predecessors, (185), 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) [2021-03-12 00:10:57,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-12 00:10:57,644 INFO L202 PluginConnector]: Adding new model bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.03 12:10:57 BasicIcfg [2021-03-12 00:10:57,644 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-12 00:10:57,645 INFO L168 Benchmark]: Toolchain (without parser) took 2095.05 ms. Allocated memory was 255.9 MB in the beginning and 390.1 MB in the end (delta: 134.2 MB). Free memory was 236.9 MB in the beginning and 348.9 MB in the end (delta: -112.0 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.0 GB. [2021-03-12 00:10:57,645 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-12 00:10:57,646 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.55 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 234.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-12 00:10:57,646 INFO L168 Benchmark]: Boogie Preprocessor took 21.63 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 233.9 MB in the end (delta: 976.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-12 00:10:57,646 INFO L168 Benchmark]: RCFGBuilder took 194.29 ms. Allocated memory is still 255.9 MB. Free memory was 233.9 MB in the beginning and 238.7 MB in the end (delta: -4.8 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.0 GB. [2021-03-12 00:10:57,647 INFO L168 Benchmark]: TraceAbstraction took 1844.28 ms. Allocated memory was 255.9 MB in the beginning and 390.1 MB in the end (delta: 134.2 MB). Free memory was 238.0 MB in the beginning and 348.9 MB in the end (delta: -110.9 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.0 GB. [2021-03-12 00:10:57,648 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.55 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 234.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.63 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 233.9 MB in the end (delta: 976.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 194.29 ms. Allocated memory is still 255.9 MB. Free memory was 233.9 MB in the beginning and 238.7 MB in the end (delta: -4.8 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1844.28 ms. Allocated memory was 255.9 MB in the beginning and 390.1 MB in the end (delta: 134.2 MB). Free memory was 238.0 MB in the beginning and 348.9 MB in the end (delta: -110.9 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 295.7ms, 34 PlacesBefore, 27 PlacesAfterwards, 27 TransitionsBefore, 20 TransitionsAfterwards, 240 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 7 TotalNumberOfCompositions, 523 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 284, positive: 236, positive conditional: 0, positive unconditional: 236, negative: 48, negative conditional: 0, negative unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 196, positive: 162, positive conditional: 0, positive unconditional: 162, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 196, positive: 151, positive conditional: 0, positive unconditional: 151, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 45, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 155, positive: 41, positive conditional: 0, positive unconditional: 41, negative: 114, negative conditional: 0, negative unconditional: 114, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 284, positive: 74, positive conditional: 0, positive unconditional: 74, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 196, unknown conditional: 0, unknown unconditional: 196] , Statistics on independence cache: Total cache size (in pairs): 96, Positive cache size: 77, Positive conditional cache size: 0, Positive unconditional cache size: 77, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19 - PositiveResult [Line: 54]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1777.4ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 561.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 347.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 33 SDtfs, 44 SDslu, 9 SDs, 0 SdLazy, 262 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 188.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 346.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=4, InterpolantAutomatonStates: 54, 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: 13.9ms SsaConstructionTime, 97.2ms SatisfiabilityAnalysisTime, 615.9ms InterpolantComputationTime, 180 NumberOfCodeBlocks, 180 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 171 ConstructedInterpolants, 0 QuantifiedInterpolants, 806 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...