/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/chl/file-item-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 23:36:16,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 23:36:16,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 23:36:16,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 23:36:16,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 23:36:16,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 23:36:16,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 23:36:16,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 23:36:16,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 23:36:16,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 23:36:16,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 23:36:16,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 23:36:16,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 23:36:16,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 23:36:16,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 23:36:16,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 23:36:16,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 23:36:16,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 23:36:16,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 23:36:16,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 23:36:16,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 23:36:16,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 23:36:16,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 23:36:16,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 23:36:16,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 23:36:16,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 23:36:16,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 23:36:16,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 23:36:16,251 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 [2021-03-24 23:36:16,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 23:36:16,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 23:36:16,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 23:36:16,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 23:36:16,279 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 23:36:16,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 23:36:16,279 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 23:36:16,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 23:36:16,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 23:36:16,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 23:36:16,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 23:36:16,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 23:36:16,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 23:36:16,280 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 23:36:16,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 23:36:16,281 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 23:36:16,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 23:36:16,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 23:36:16,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 23:36:16,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 23:36:16,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 23:36:16,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 23:36:16,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 23:36:16,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 23:36:16,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 23:36:16,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 23:36:16,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 23:36:16,282 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 23:36:16,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 23:36:16,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 23:36:16,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 23:36:16,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 23:36:16,611 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 23:36:16,615 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 23:36:16,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/file-item-symm.wvr.bpl [2021-03-24 23:36:16,616 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/file-item-symm.wvr.bpl' [2021-03-24 23:36:16,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 23:36:16,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 23:36:16,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 23:36:16,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 23:36:16,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 23:36:16,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:36:16" (1/1) ... [2021-03-24 23:36:16,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:36:16" (1/1) ... [2021-03-24 23:36:16,672 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 23:36:16,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 23:36:16,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 23:36:16,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 23:36:16,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:36:16" (1/1) ... [2021-03-24 23:36:16,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:36:16" (1/1) ... [2021-03-24 23:36:16,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:36:16" (1/1) ... [2021-03-24 23:36:16,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:36:16" (1/1) ... [2021-03-24 23:36:16,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:36:16" (1/1) ... [2021-03-24 23:36:16,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:36:16" (1/1) ... [2021-03-24 23:36:16,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:36:16" (1/1) ... [2021-03-24 23:36:16,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 23:36:16,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 23:36:16,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 23:36:16,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 23:36:16,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:36:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 23:36:16,757 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 23:36:16,757 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 23:36:16,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 23:36:16,759 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 23:36:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 23:36:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 23:36:16,759 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 23:36:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 23:36:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 23:36:16,760 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 23:36:16,890 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 23:36:16,891 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 23:36:16,892 INFO L202 PluginConnector]: Adding new model file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 11:36:16 BoogieIcfgContainer [2021-03-24 23:36:16,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 23:36:16,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 23:36:16,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 23:36:16,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 23:36:16,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:36:16" (1/2) ... [2021-03-24 23:36:16,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d42282b and model type file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 11:36:16, skipping insertion in model container [2021-03-24 23:36:16,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 11:36:16" (2/2) ... [2021-03-24 23:36:16,898 INFO L111 eAbstractionObserver]: Analyzing ICFG file-item-symm.wvr.bpl [2021-03-24 23:36:16,902 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 23:36:16,905 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 23:36:16,906 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 23:36:16,929 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-24 23:36:16,944 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-24 23:36:16,961 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 23:36:16,961 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 23:36:16,961 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 23:36:16,961 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 23:36:16,961 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 23:36:16,961 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 23:36:16,962 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 23:36:16,962 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 23:36:16,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 14 transitions, 44 flow [2021-03-24 23:36:16,984 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-24 23:36:16,984 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 23:36:16,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 12 events. 0/12 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 23:36:16,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 14 transitions, 44 flow [2021-03-24 23:36:16,989 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 10 transitions, 32 flow [2021-03-24 23:36:16,990 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 23:36:17,002 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 17 places, 10 transitions, 32 flow [2021-03-24 23:36:17,007 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 17 places, 10 transitions, 32 flow [2021-03-24 23:36:17,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 17 places, 10 transitions, 32 flow [2021-03-24 23:36:17,025 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-24 23:36:17,025 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 23:36:17,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 10 events. 0/10 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 23:36:17,027 INFO L142 LiptonReduction]: Number of co-enabled transitions 16 [2021-03-24 23:36:17,114 INFO L154 LiptonReduction]: Checked pairs total: 6 [2021-03-24 23:36:17,115 INFO L156 LiptonReduction]: Total number of compositions: 3 [2021-03-24 23:36:17,116 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 127 [2021-03-24 23:36:17,123 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-03-24 23:36:17,124 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 23:36:17,124 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 23:36:17,124 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-24 23:36:17,125 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 23:36:17,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 23:36:17,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1664346307, now seen corresponding path program 1 times [2021-03-24 23:36:17,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 23:36:17,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578525676] [2021-03-24 23:36:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 23:36:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 23:36:17,348 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:36:17,349 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 23:36:17,367 INFO L142 QuantifierPusher]: treesize reduction 260, result has 21.7 percent of original size [2021-03-24 23:36:17,370 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-03-24 23:36:17,515 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-24 23:36:17,525 INFO L142 QuantifierPusher]: treesize reduction 138, result has 37.8 percent of original size [2021-03-24 23:36:17,536 INFO L147 QuantifierPusher]: treesize reduction 47, result has 44.0 percent of original size 37 [2021-03-24 23:36:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 23:36:17,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578525676] [2021-03-24 23:36:17,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 23:36:17,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 23:36:17,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822912213] [2021-03-24 23:36:17,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 23:36:17,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 23:36:17,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 23:36:17,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 23:36:17,602 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 17 [2021-03-24 23:36:17,603 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 7 transitions, 26 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 23:36:17,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 23:36:17,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 17 [2021-03-24 23:36:17,605 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 23:36:17,716 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-24 23:36:17,717 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 23:36:17,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 11 events. 0/11 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 23:36:17,718 INFO L132 encePairwiseOnDemand]: 14/17 looper letters, 2 selfloop transitions, 1 changer transitions 1/8 dead transitions. [2021-03-24 23:36:17,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 8 transitions, 36 flow [2021-03-24 23:36:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 23:36:17,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 23:36:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2021-03-24 23:36:17,728 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2021-03-24 23:36:17,729 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2021-03-24 23:36:17,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2021-03-24 23:36:17,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 23:36:17,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2021-03-24 23:36:17,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 23:36:17,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 23:36:17,737 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 23:36:17,738 INFO L185 Difference]: Start difference. First operand has 14 places, 7 transitions, 26 flow. Second operand 4 states and 45 transitions. [2021-03-24 23:36:17,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 8 transitions, 36 flow [2021-03-24 23:36:17,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 8 transitions, 28 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-24 23:36:17,742 INFO L241 Difference]: Finished difference. Result has 15 places, 7 transitions, 25 flow [2021-03-24 23:36:17,745 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=25, PETRI_PLACES=15, PETRI_TRANSITIONS=7} [2021-03-24 23:36:17,746 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, 1 predicate places. [2021-03-24 23:36:17,746 INFO L480 AbstractCegarLoop]: Abstraction has has 15 places, 7 transitions, 25 flow [2021-03-24 23:36:17,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 23:36:17,746 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 23:36:17,746 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-24 23:36:17,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 23:36:17,747 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 23:36:17,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 23:36:17,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1662558847, now seen corresponding path program 2 times [2021-03-24 23:36:17,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 23:36:17,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978537643] [2021-03-24 23:36:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 23:36:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 23:36:17,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:36:17,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 23:36:17,870 INFO L142 QuantifierPusher]: treesize reduction 252, result has 22.2 percent of original size [2021-03-24 23:36:17,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-03-24 23:36:18,016 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-24 23:36:18,029 INFO L142 QuantifierPusher]: treesize reduction 198, result has 31.7 percent of original size [2021-03-24 23:36:18,034 INFO L147 QuantifierPusher]: treesize reduction 55, result has 40.2 percent of original size 37 [2021-03-24 23:36:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 23:36:18,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978537643] [2021-03-24 23:36:18,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 23:36:18,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 23:36:18,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796352807] [2021-03-24 23:36:18,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 23:36:18,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 23:36:18,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 23:36:18,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 23:36:18,088 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 17 [2021-03-24 23:36:18,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 7 transitions, 25 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 23:36:18,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 23:36:18,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 17 [2021-03-24 23:36:18,088 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 23:36:18,168 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-03-24 23:36:18,168 INFO L130 PetriNetUnfolder]: For 8/10 co-relation queries the response was YES. [2021-03-24 23:36:18,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 7 events. 0/7 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 4 event pairs, 0 based on Foata normal form. 1/8 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 23:36:18,168 INFO L132 encePairwiseOnDemand]: 14/17 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2021-03-24 23:36:18,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 7 transitions, 32 flow [2021-03-24 23:36:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 23:36:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 23:36:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2021-03-24 23:36:18,171 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2021-03-24 23:36:18,171 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 44 transitions. [2021-03-24 23:36:18,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 44 transitions. [2021-03-24 23:36:18,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 23:36:18,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 44 transitions. [2021-03-24 23:36:18,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 23:36:18,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 23:36:18,176 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 23:36:18,176 INFO L185 Difference]: Start difference. First operand has 15 places, 7 transitions, 25 flow. Second operand 4 states and 44 transitions. [2021-03-24 23:36:18,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 7 transitions, 32 flow [2021-03-24 23:36:18,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 7 transitions, 30 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 23:36:18,182 INFO L241 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2021-03-24 23:36:18,182 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2021-03-24 23:36:18,183 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, 1 predicate places. [2021-03-24 23:36:18,183 INFO L480 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2021-03-24 23:36:18,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 23:36:18,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 23:36:18,186 INFO L202 PluginConnector]: Adding new model file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 11:36:18 BasicIcfg [2021-03-24 23:36:18,187 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 23:36:18,188 INFO L168 Benchmark]: Toolchain (without parser) took 1541.06 ms. Allocated memory was 255.9 MB in the beginning and 419.4 MB in the end (delta: 163.6 MB). Free memory was 236.9 MB in the beginning and 399.8 MB in the end (delta: -162.9 MB). Peak memory consumption was 58.4 MB. Max. memory is 16.0 GB. [2021-03-24 23:36:18,189 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 23:36:18,191 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.44 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 23:36:18,192 INFO L168 Benchmark]: Boogie Preprocessor took 13.49 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.5 MB in the end (delta: 822.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 23:36:18,193 INFO L168 Benchmark]: RCFGBuilder took 202.96 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 237.4 MB in the end (delta: -3.0 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.0 GB. [2021-03-24 23:36:18,198 INFO L168 Benchmark]: TraceAbstraction took 1293.51 ms. Allocated memory was 255.9 MB in the beginning and 419.4 MB in the end (delta: 163.6 MB). Free memory was 236.9 MB in the beginning and 399.8 MB in the end (delta: -162.9 MB). Peak memory consumption was 57.7 MB. Max. memory is 16.0 GB. [2021-03-24 23:36:18,200 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.44 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.49 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.5 MB in the end (delta: 822.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 202.96 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 237.4 MB in the end (delta: -3.0 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1293.51 ms. Allocated memory was 255.9 MB in the beginning and 419.4 MB in the end (delta: 163.6 MB). Free memory was 236.9 MB in the beginning and 399.8 MB in the end (delta: -162.9 MB). Peak memory consumption was 57.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 107.9ms, 17 PlacesBefore, 14 PlacesAfterwards, 10 TransitionsBefore, 7 TransitionsAfterwards, 16 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 6 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 6, unknown conditional: 0, unknown unconditional: 6] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 38]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1226.3ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 242.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 158.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4 SDtfs, 3 SDslu, 0 SDs, 0 SdLazy, 10 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 532.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, InterpolantAutomatonStates: 8, 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: 5.5ms SsaConstructionTime, 89.6ms SatisfiabilityAnalysisTime, 636.7ms InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...