/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/file-item-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 14:42:06,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 14:42:06,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 14:42:06,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 14:42:06,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 14:42:06,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 14:42:06,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 14:42:06,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 14:42:06,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 14:42:06,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 14:42:06,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 14:42:06,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 14:42:06,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 14:42:06,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 14:42:06,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 14:42:06,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 14:42:06,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 14:42:06,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 14:42:06,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 14:42:06,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 14:42:06,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 14:42:06,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 14:42:06,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 14:42:06,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 14:42:06,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 14:42:06,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-24 14:42:06,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-24 14:42:06,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-24 14:42:06,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-24 14:42:06,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-24 14:42:06,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-24 14:42:06,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-24 14:42:06,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-24 14:42:06,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 14:42:06,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 14:42:06,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 14:42:06,643 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2021-03-24 14:42:06,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 14:42:06,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 14:42:06,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 14:42:06,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 14:42:06,680 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 14:42:06,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 14:42:06,680 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 14:42:06,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 14:42:06,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 14:42:06,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 14:42:06,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 14:42:06,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 14:42:06,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 14:42:06,682 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 14:42:06,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 14:42:06,682 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 14:42:06,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 14:42:06,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 14:42:06,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 14:42:06,683 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 14:42:06,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 14:42:06,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 14:42:06,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 14:42:06,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 14:42:06,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 14:42:06,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 14:42:06,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 14:42:06,684 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 14:42:06,685 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 14:42:06,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 14:42:06,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 14:42:06,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 14:42:06,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 14:42:06,994 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 14:42:06,995 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 14:42:06,996 INFO L432 ainManager$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 14:42:06,996 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 14:42:07,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 14:42:07,046 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 14:42:07,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 14:42:07,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 14:42:07,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 14:42:07,063 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 02:42:07" (1/1) ... [2021-03-24 14:42:07,069 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 02:42:07" (1/1) ... [2021-03-24 14:42:07,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 14:42:07,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 14:42:07,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 14:42:07,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 14:42:07,090 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 02:42:07" (1/1) ... [2021-03-24 14:42:07,090 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 02:42:07" (1/1) ... [2021-03-24 14:42:07,091 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 02:42:07" (1/1) ... [2021-03-24 14:42:07,091 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 02:42:07" (1/1) ... [2021-03-24 14:42:07,092 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 02:42:07" (1/1) ... [2021-03-24 14:42:07,093 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 02:42:07" (1/1) ... [2021-03-24 14:42:07,094 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 02:42:07" (1/1) ... [2021-03-24 14:42:07,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 14:42:07,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 14:42:07,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 14:42:07,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 14:42:07,097 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 02:42:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 14:42:07,162 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 14:42:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 14:42:07,162 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 14:42:07,163 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 14:42:07,163 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 14:42:07,163 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 14:42:07,163 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 14:42:07,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 14:42:07,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 14:42:07,164 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 14:42:07,316 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 14:42:07,316 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 14:42:07,319 INFO L202 PluginConnector]: Adding new model file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 02:42:07 BoogieIcfgContainer [2021-03-24 14:42:07,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 14:42:07,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 14:42:07,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 14:42:07,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 14:42:07,324 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 02:42:07" (1/2) ... [2021-03-24 14:42:07,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29573728 and model type file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 02:42:07, skipping insertion in model container [2021-03-24 14:42:07,325 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 02:42:07" (2/2) ... [2021-03-24 14:42:07,326 INFO L111 eAbstractionObserver]: Analyzing ICFG file-item-symm.wvr.bpl [2021-03-24 14:42:07,333 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 14:42:07,337 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 14:42:07,338 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 14:42:07,397 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-24 14:42:07,414 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-24 14:42:07,447 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 14:42:07,447 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 14:42:07,448 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 14:42:07,448 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 14:42:07,448 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 14:42:07,448 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 14:42:07,448 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 14:42:07,448 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 14:42:07,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 14 transitions, 44 flow [2021-03-24 14:42:07,481 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-24 14:42:07,481 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 14:42:07,483 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 14:42:07,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 14 transitions, 44 flow [2021-03-24 14:42:07,486 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 10 transitions, 32 flow [2021-03-24 14:42:07,488 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 14:42:07,496 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 17 places, 10 transitions, 32 flow [2021-03-24 14:42:07,500 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 17 places, 10 transitions, 32 flow [2021-03-24 14:42:07,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 17 places, 10 transitions, 32 flow [2021-03-24 14:42:07,513 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-24 14:42:07,513 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 14:42:07,513 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 14:42:07,515 INFO L142 LiptonReduction]: Number of co-enabled transitions 16 [2021-03-24 14:42:07,630 INFO L154 LiptonReduction]: Checked pairs total: 6 [2021-03-24 14:42:07,630 INFO L156 LiptonReduction]: Total number of compositions: 3 [2021-03-24 14:42:07,632 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 144 [2021-03-24 14:42:07,638 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-03-24 14:42:07,638 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 14:42:07,639 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:42:07,639 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:42:07,639 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:42:07,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:42:07,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1664346307, now seen corresponding path program 1 times [2021-03-24 14:42:07,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:42:07,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201422612] [2021-03-24 14:42:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:42:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:42:07,903 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:42:07,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:42:07,922 INFO L142 QuantifierPusher]: treesize reduction 260, result has 21.7 percent of original size [2021-03-24 14:42:07,926 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-03-24 14:42:08,094 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-24 14:42:08,102 INFO L142 QuantifierPusher]: treesize reduction 138, result has 37.8 percent of original size [2021-03-24 14:42:08,105 INFO L147 QuantifierPusher]: treesize reduction 47, result has 44.0 percent of original size 37 [2021-03-24 14:42:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 14:42:08,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201422612] [2021-03-24 14:42:08,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:42:08,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 14:42:08,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535514274] [2021-03-24 14:42:08,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 14:42:08,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:42:08,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 14:42:08,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 14:42:08,172 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 17 [2021-03-24 14:42:08,174 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 14:42:08,174 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:42:08,174 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 17 [2021-03-24 14:42:08,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:42:08,257 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-24 14:42:08,258 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 14:42:08,258 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 14:42:08,259 INFO L132 encePairwiseOnDemand]: 14/17 looper letters, 2 selfloop transitions, 1 changer transitions 1/8 dead transitions. [2021-03-24 14:42:08,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 8 transitions, 36 flow [2021-03-24 14:42:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 14:42:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 14:42:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2021-03-24 14:42:08,272 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2021-03-24 14:42:08,273 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2021-03-24 14:42:08,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2021-03-24 14:42:08,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:42:08,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2021-03-24 14:42:08,280 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 14:42:08,297 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 14:42:08,297 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 14:42:08,299 INFO L185 Difference]: Start difference. First operand has 14 places, 7 transitions, 26 flow. Second operand 4 states and 45 transitions. [2021-03-24 14:42:08,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 8 transitions, 36 flow [2021-03-24 14:42:08,302 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 14:42:08,303 INFO L241 Difference]: Finished difference. Result has 15 places, 7 transitions, 25 flow [2021-03-24 14:42:08,313 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 14:42:08,313 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, 1 predicate places. [2021-03-24 14:42:08,314 INFO L480 AbstractCegarLoop]: Abstraction has has 15 places, 7 transitions, 25 flow [2021-03-24 14:42:08,314 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 14:42:08,314 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 14:42:08,314 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-24 14:42:08,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 14:42:08,315 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 14:42:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 14:42:08,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1662558847, now seen corresponding path program 2 times [2021-03-24 14:42:08,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 14:42:08,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105437973] [2021-03-24 14:42:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 14:42:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 14:42:08,398 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 14:42:08,399 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 14:42:08,406 INFO L142 QuantifierPusher]: treesize reduction 252, result has 22.2 percent of original size [2021-03-24 14:42:08,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-03-24 14:42:08,524 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-24 14:42:08,553 INFO L142 QuantifierPusher]: treesize reduction 198, result has 31.7 percent of original size [2021-03-24 14:42:08,560 INFO L147 QuantifierPusher]: treesize reduction 55, result has 40.2 percent of original size 37 [2021-03-24 14:42:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 14:42:08,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105437973] [2021-03-24 14:42:08,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 14:42:08,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 14:42:08,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929678096] [2021-03-24 14:42:08,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 14:42:08,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 14:42:08,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 14:42:08,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 14:42:08,600 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 17 [2021-03-24 14:42:08,600 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 14:42:08,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 14:42:08,600 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 17 [2021-03-24 14:42:08,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 14:42:08,670 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-03-24 14:42:08,670 INFO L130 PetriNetUnfolder]: For 8/10 co-relation queries the response was YES. [2021-03-24 14:42:08,671 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 14:42:08,671 INFO L132 encePairwiseOnDemand]: 14/17 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2021-03-24 14:42:08,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 7 transitions, 32 flow [2021-03-24 14:42:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 14:42:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 14:42:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2021-03-24 14:42:08,674 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2021-03-24 14:42:08,674 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 44 transitions. [2021-03-24 14:42:08,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 44 transitions. [2021-03-24 14:42:08,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 14:42:08,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 44 transitions. [2021-03-24 14:42:08,680 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 14:42:08,684 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 14:42:08,684 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 14:42:08,685 INFO L185 Difference]: Start difference. First operand has 15 places, 7 transitions, 25 flow. Second operand 4 states and 44 transitions. [2021-03-24 14:42:08,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 7 transitions, 32 flow [2021-03-24 14:42:08,688 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 14:42:08,688 INFO L241 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2021-03-24 14:42:08,689 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 14:42:08,689 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, 1 predicate places. [2021-03-24 14:42:08,689 INFO L480 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2021-03-24 14:42:08,690 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 14:42:08,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 14:42:08,693 INFO L202 PluginConnector]: Adding new model file-item-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 02:42:08 BasicIcfg [2021-03-24 14:42:08,693 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 14:42:08,703 INFO L168 Benchmark]: Toolchain (without parser) took 1656.38 ms. Allocated memory was 255.9 MB in the beginning and 360.7 MB in the end (delta: 104.9 MB). Free memory was 236.5 MB in the beginning and 345.5 MB in the end (delta: -109.0 MB). Peak memory consumption was 60.8 MB. Max. memory is 16.0 GB. [2021-03-24 14:42:08,703 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 14:42:08,704 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.42 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. [2021-03-24 14:42:08,704 INFO L168 Benchmark]: Boogie Preprocessor took 15.18 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.0 MB in the end (delta: 923.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 14:42:08,705 INFO L168 Benchmark]: RCFGBuilder took 224.11 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 241.0 MB in the end (delta: -7.0 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.0 GB. [2021-03-24 14:42:08,706 INFO L168 Benchmark]: TraceAbstraction took 1380.35 ms. Allocated memory was 255.9 MB in the beginning and 360.7 MB in the end (delta: 104.9 MB). Free memory was 240.6 MB in the beginning and 345.5 MB in the end (delta: -104.9 MB). Peak memory consumption was 63.1 MB. Max. memory is 16.0 GB. [2021-03-24 14:42:08,707 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 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 31.42 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 15.18 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.0 MB in the end (delta: 923.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 224.11 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 241.0 MB in the end (delta: -7.0 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1380.35 ms. Allocated memory was 255.9 MB in the beginning and 360.7 MB in the end (delta: 104.9 MB). Free memory was 240.6 MB in the beginning and 345.5 MB in the end (delta: -104.9 MB). Peak memory consumption was 63.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 130.2ms, 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: 5, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 5, unknown conditional: 0, unknown unconditional: 5] , 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: 2.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1248.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 235.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 187.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4 SDtfs, 3 SDslu, 0 SDs, 0 SdLazy, 10 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 487.1ms 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: 4.6ms SsaConstructionTime, 66.2ms SatisfiabilityAnalysisTime, 645.1ms 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...