/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/sre-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 23:55:47,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 23:55:47,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 23:55:47,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 23:55:47,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 23:55:47,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 23:55:47,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 23:55:47,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 23:55:47,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 23:55:47,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 23:55:47,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 23:55:47,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 23:55:47,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 23:55:47,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 23:55:47,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 23:55:47,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 23:55:47,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 23:55:47,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 23:55:47,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 23:55:47,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 23:55:47,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 23:55:47,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 23:55:47,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 23:55:47,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 23:55:47,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 23:55:47,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 23:55:47,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 23:55:47,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 23:55:47,096 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 23:55:47,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 23:55:47,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 23:55:47,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 23:55:47,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 23:55:47,111 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 23:55:47,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 23:55:47,111 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 23:55:47,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 23:55:47,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 23:55:47,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 23:55:47,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 23:55:47,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 23:55:47,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 23:55:47,112 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 23:55:47,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 23:55:47,112 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 23:55:47,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 23:55:47,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 23:55:47,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 23:55:47,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 23:55:47,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 23:55:47,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 23:55:47,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 23:55:47,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 23:55:47,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 23:55:47,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 23:55:47,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 23:55:47,114 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 23:55:47,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 23:55:47,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 23:55:47,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 23:55:47,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 23:55:47,449 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 23:55:47,450 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 23:55:47,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/sre-trans.wvr.bpl [2021-03-24 23:55:47,451 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/sre-trans.wvr.bpl' [2021-03-24 23:55:47,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 23:55:47,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 23:55:47,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 23:55:47,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 23:55:47,486 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 23:55:47,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:55:47" (1/1) ... [2021-03-24 23:55:47,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:55:47" (1/1) ... [2021-03-24 23:55:47,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 23:55:47,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 23:55:47,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 23:55:47,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 23:55:47,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:55:47" (1/1) ... [2021-03-24 23:55:47,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:55:47" (1/1) ... [2021-03-24 23:55:47,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:55:47" (1/1) ... [2021-03-24 23:55:47,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:55:47" (1/1) ... [2021-03-24 23:55:47,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:55:47" (1/1) ... [2021-03-24 23:55:47,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:55:47" (1/1) ... [2021-03-24 23:55:47,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:55:47" (1/1) ... [2021-03-24 23:55:47,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 23:55:47,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 23:55:47,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 23:55:47,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 23:55:47,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:55:47" (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 23:55:47,570 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 23:55:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 23:55:47,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 23:55:47,572 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 23:55:47,572 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 23:55:47,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 23:55:47,573 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 23:55:47,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 23:55:47,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 23:55:47,573 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-24 23:55:47,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-24 23:55:47,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-24 23:55:47,574 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 23:55:47,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 23:55:47,684 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 23:55:47,685 INFO L202 PluginConnector]: Adding new model sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 11:55:47 BoogieIcfgContainer [2021-03-24 23:55:47,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 23:55:47,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 23:55:47,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 23:55:47,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 23:55:47,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 11:55:47" (1/2) ... [2021-03-24 23:55:47,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4f5c46 and model type sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 11:55:47, skipping insertion in model container [2021-03-24 23:55:47,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 11:55:47" (2/2) ... [2021-03-24 23:55:47,690 INFO L111 eAbstractionObserver]: Analyzing ICFG sre-trans.wvr.bpl [2021-03-24 23:55:47,694 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 23:55:47,696 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 23:55:47,697 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 23:55:47,721 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-24 23:55:47,733 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-24 23:55:47,747 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 23:55:47,747 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 23:55:47,747 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 23:55:47,747 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 23:55:47,747 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 23:55:47,748 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 23:55:47,748 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 23:55:47,748 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 23:55:47,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-03-24 23:55:47,769 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-24 23:55:47,769 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 23:55:47,770 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 16 events. 0/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 23:55:47,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-03-24 23:55:47,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-03-24 23:55:47,774 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 23:55:47,802 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-24 23:55:47,805 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 14 transitions, 46 flow [2021-03-24 23:55:47,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 14 transitions, 46 flow [2021-03-24 23:55:47,811 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-24 23:55:47,811 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 23:55:47,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 14 events. 0/14 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 23:55:47,813 INFO L142 LiptonReduction]: Number of co-enabled transitions 48 [2021-03-24 23:55:47,875 INFO L154 LiptonReduction]: Checked pairs total: 18 [2021-03-24 23:55:47,875 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 23:55:47,876 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 103 [2021-03-24 23:55:47,885 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-24 23:55:47,885 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 23:55:47,885 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 23:55:47,886 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 23:55:47,886 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 23:55:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 23:55:47,890 INFO L82 PathProgramCache]: Analyzing trace with hash -730943987, now seen corresponding path program 1 times [2021-03-24 23:55:47,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 23:55:47,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841172909] [2021-03-24 23:55:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 23:55:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 23:55:47,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:55:47,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 23:55:48,006 INFO L142 QuantifierPusher]: treesize reduction 100, result has 24.2 percent of original size [2021-03-24 23:55:48,007 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-03-24 23:55:48,036 INFO L142 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-03-24 23:55:48,037 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 23:55:48,044 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 23:55:48,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841172909] [2021-03-24 23:55:48,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 23:55:48,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 23:55:48,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162198577] [2021-03-24 23:55:48,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 23:55:48,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 23:55:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 23:55:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 23:55:48,061 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-24 23:55:48,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 10 transitions, 38 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 23:55:48,062 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 23:55:48,062 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-24 23:55:48,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 23:55:48,115 INFO L129 PetriNetUnfolder]: 4/27 cut-off events. [2021-03-24 23:55:48,115 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-03-24 23:55:48,116 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 27 events. 4/27 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 72 event pairs, 1 based on Foata normal form. 1/26 useless extension candidates. Maximal degree in co-relation 42. Up to 7 conditions per place. [2021-03-24 23:55:48,117 INFO L132 encePairwiseOnDemand]: 20/23 looper letters, 4 selfloop transitions, 1 changer transitions 2/13 dead transitions. [2021-03-24 23:55:48,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 13 transitions, 58 flow [2021-03-24 23:55:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 23:55:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 23:55:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2021-03-24 23:55:48,125 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2021-03-24 23:55:48,125 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 64 transitions. [2021-03-24 23:55:48,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 64 transitions. [2021-03-24 23:55:48,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 23:55:48,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 64 transitions. [2021-03-24 23:55:48,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 23:55:48,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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 23:55:48,132 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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 23:55:48,134 INFO L185 Difference]: Start difference. First operand has 20 places, 10 transitions, 38 flow. Second operand 4 states and 64 transitions. [2021-03-24 23:55:48,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 13 transitions, 58 flow [2021-03-24 23:55:48,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 13 transitions, 46 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-24 23:55:48,137 INFO L241 Difference]: Finished difference. Result has 19 places, 10 transitions, 33 flow [2021-03-24 23:55:48,138 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=33, PETRI_PLACES=19, PETRI_TRANSITIONS=10} [2021-03-24 23:55:48,139 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2021-03-24 23:55:48,139 INFO L480 AbstractCegarLoop]: Abstraction has has 19 places, 10 transitions, 33 flow [2021-03-24 23:55:48,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 23:55:48,139 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 23:55:48,139 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 23:55:48,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 23:55:48,140 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 23:55:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 23:55:48,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1921135629, now seen corresponding path program 2 times [2021-03-24 23:55:48,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 23:55:48,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95806313] [2021-03-24 23:55:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 23:55:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 23:55:48,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 23:55:48,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 23:55:48,165 INFO L142 QuantifierPusher]: treesize reduction 5, result has 54.5 percent of original size [2021-03-24 23:55:48,165 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-03-24 23:55:48,170 INFO L142 QuantifierPusher]: treesize reduction 10, result has 41.2 percent of original size [2021-03-24 23:55:48,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 23:55:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 23:55:48,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95806313] [2021-03-24 23:55:48,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 23:55:48,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 23:55:48,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988360878] [2021-03-24 23:55:48,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 23:55:48,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 23:55:48,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 23:55:48,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 23:55:48,179 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 23 [2021-03-24 23:55:48,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 10 transitions, 33 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 23:55:48,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 23:55:48,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 23 [2021-03-24 23:55:48,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 23:55:48,195 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-24 23:55:48,195 INFO L130 PetriNetUnfolder]: For 8/10 co-relation queries the response was YES. [2021-03-24 23:55:48,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 10 events. 0/10 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 9 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 23:55:48,196 INFO L132 encePairwiseOnDemand]: 20/23 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-03-24 23:55:48,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 10 transitions, 40 flow [2021-03-24 23:55:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 23:55:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 23:55:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2021-03-24 23:55:48,197 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7391304347826086 [2021-03-24 23:55:48,197 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 68 transitions. [2021-03-24 23:55:48,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 68 transitions. [2021-03-24 23:55:48,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 23:55:48,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 68 transitions. [2021-03-24 23:55:48,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 23:55:48,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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 23:55:48,199 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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 23:55:48,199 INFO L185 Difference]: Start difference. First operand has 19 places, 10 transitions, 33 flow. Second operand 4 states and 68 transitions. [2021-03-24 23:55:48,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 10 transitions, 40 flow [2021-03-24 23:55:48,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 10 transitions, 38 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 23:55:48,200 INFO L241 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2021-03-24 23:55:48,200 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2021-03-24 23:55:48,201 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2021-03-24 23:55:48,201 INFO L480 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2021-03-24 23:55:48,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 23:55:48,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 23:55:48,204 INFO L202 PluginConnector]: Adding new model sre-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 11:55:48 BasicIcfg [2021-03-24 23:55:48,205 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 23:55:48,206 INFO L168 Benchmark]: Toolchain (without parser) took 721.32 ms. Allocated memory is still 337.6 MB. Free memory was 318.1 MB in the beginning and 275.3 MB in the end (delta: 42.8 MB). Peak memory consumption was 44.2 MB. Max. memory is 16.0 GB. [2021-03-24 23:55:48,206 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 337.6 MB. Free memory was 319.2 MB in the beginning and 319.1 MB in the end (delta: 71.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 23:55:48,206 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.91 ms. Allocated memory is still 337.6 MB. Free memory was 318.0 MB in the beginning and 316.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 23:55:48,207 INFO L168 Benchmark]: Boogie Preprocessor took 14.05 ms. Allocated memory is still 337.6 MB. Free memory was 316.6 MB in the beginning and 315.7 MB in the end (delta: 903.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 23:55:48,207 INFO L168 Benchmark]: RCFGBuilder took 163.23 ms. Allocated memory is still 337.6 MB. Free memory was 315.7 MB in the beginning and 306.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-24 23:55:48,208 INFO L168 Benchmark]: TraceAbstraction took 518.75 ms. Allocated memory is still 337.6 MB. Free memory was 305.7 MB in the beginning and 275.3 MB in the end (delta: 30.4 MB). Peak memory consumption was 31.6 MB. Max. memory is 16.0 GB. [2021-03-24 23:55:48,209 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 337.6 MB. Free memory was 319.2 MB in the beginning and 319.1 MB in the end (delta: 71.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.91 ms. Allocated memory is still 337.6 MB. Free memory was 318.0 MB in the beginning and 316.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.05 ms. Allocated memory is still 337.6 MB. Free memory was 316.6 MB in the beginning and 315.7 MB in the end (delta: 903.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 163.23 ms. Allocated memory is still 337.6 MB. Free memory was 315.7 MB in the beginning and 306.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 518.75 ms. Allocated memory is still 337.6 MB. Free memory was 305.7 MB in the beginning and 275.3 MB in the end (delta: 30.4 MB). Peak memory consumption was 31.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 70.3ms, 24 PlacesBefore, 20 PlacesAfterwards, 14 TransitionsBefore, 10 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 18 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , 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: 18, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 18, unknown conditional: 0, unknown unconditional: 18] , 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: 44]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 457.7ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 104.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 132.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5 SDtfs, 4 SDslu, 1 SDs, 0 SdLazy, 14 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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: 4.1ms SsaConstructionTime, 25.2ms SatisfiabilityAnalysisTime, 113.5ms InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 114 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...