/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-RepeatedSemanticLbeWithDisjunctivePredicates.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-26 13:22:01,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-26 13:22:01,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-26 13:22:01,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-26 13:22:01,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-26 13:22:01,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-26 13:22:01,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-26 13:22:01,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-26 13:22:01,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-26 13:22:01,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-26 13:22:01,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-26 13:22:01,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-26 13:22:01,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-26 13:22:01,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-26 13:22:01,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-26 13:22:01,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-26 13:22:01,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-26 13:22:01,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-26 13:22:01,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-26 13:22:01,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-26 13:22:01,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-26 13:22:01,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-26 13:22:01,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-26 13:22:01,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-26 13:22:01,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-26 13:22:01,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-26 13:22:01,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-26 13:22:01,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-26 13:22:01,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-26 13:22:01,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-26 13:22:01,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-26 13:22:01,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-26 13:22:01,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-26 13:22:01,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-26 13:22:01,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-26 13:22:01,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-26 13:22:01,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-26 13:22:01,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-26 13:22:01,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-26 13:22:01,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-26 13:22:01,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-26 13:22:01,171 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-RepeatedSemanticLbeWithDisjunctivePredicates.epf [2021-03-26 13:22:01,207 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-26 13:22:01,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-26 13:22:01,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-26 13:22:01,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-26 13:22:01,209 INFO L138 SettingsManager]: * Use SBE=true [2021-03-26 13:22:01,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-26 13:22:01,209 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-26 13:22:01,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-26 13:22:01,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-26 13:22:01,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-26 13:22:01,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-26 13:22:01,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-26 13:22:01,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-26 13:22:01,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-26 13:22:01,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-26 13:22:01,211 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-26 13:22:01,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-26 13:22:01,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-26 13:22:01,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-26 13:22:01,211 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-26 13:22:01,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-26 13:22:01,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-26 13:22:01,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-26 13:22:01,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-26 13:22:01,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-26 13:22:01,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-26 13:22:01,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-26 13:22:01,212 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=SEMANTIC_BASED_MOVER_CHECK_WITH_PREDICATES_DISJUNCTIVE [2021-03-26 13:22:01,213 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-26 13:22:01,213 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-26 13:22:01,213 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-26 13:22:01,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-26 13:22:01,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-26 13:22:01,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-26 13:22:01,559 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-26 13:22:01,560 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-26 13:22:01,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl [2021-03-26 13:22:01,561 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl' [2021-03-26 13:22:01,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-26 13:22:01,594 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-26 13:22:01,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-26 13:22:01,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-26 13:22:01,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-26 13:22:01,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 01:22:01" (1/1) ... [2021-03-26 13:22:01,610 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 01:22:01" (1/1) ... [2021-03-26 13:22:01,616 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-26 13:22:01,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-26 13:22:01,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-26 13:22:01,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-26 13:22:01,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 01:22:01" (1/1) ... [2021-03-26 13:22:01,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 01:22:01" (1/1) ... [2021-03-26 13:22:01,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 01:22:01" (1/1) ... [2021-03-26 13:22:01,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 01:22:01" (1/1) ... [2021-03-26 13:22:01,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 01:22:01" (1/1) ... [2021-03-26 13:22:01,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 01:22:01" (1/1) ... [2021-03-26 13:22:01,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 01:22:01" (1/1) ... [2021-03-26 13:22:01,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-26 13:22:01,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-26 13:22:01,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-26 13:22:01,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-26 13:22:01,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 01:22:01" (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 [2021-03-26 13:22:01,697 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-03-26 13:22:01,697 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-26 13:22:01,698 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-26 13:22:01,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-26 13:22:01,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-26 13:22:01,699 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-26 13:22:01,821 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-26 13:22:01,822 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-26 13:22:01,823 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.03 01:22:01 BoogieIcfgContainer [2021-03-26 13:22:01,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-26 13:22:01,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-26 13:22:01,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-26 13:22:01,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-26 13:22:01,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 01:22:01" (1/2) ... [2021-03-26 13:22:01,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79864aa6 and model type fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.03 01:22:01, skipping insertion in model container [2021-03-26 13:22:01,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.03 01:22:01" (2/2) ... [2021-03-26 13:22:01,829 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_unchanged_local_variables2.bpl [2021-03-26 13:22:01,833 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-26 13:22:01,836 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-26 13:22:01,837 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-26 13:22:01,851 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-26 13:22:01,851 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-26 13:22:01,852 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-26 13:22:01,852 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-26 13:22:01,853 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-26 13:22:01,854 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-26 13:22:01,858 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-03-26 13:22:01,873 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-26 13:22:01,890 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-26 13:22:01,890 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-26 13:22:01,890 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-26 13:22:01,890 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-26 13:22:01,890 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-26 13:22:01,891 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-26 13:22:01,891 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-26 13:22:01,891 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-26 13:22:01,898 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 18 places, 16 transitions, 40 flow [2021-03-26 13:22:01,913 INFO L129 PetriNetUnfolder]: 2/15 cut-off events. [2021-03-26 13:22:01,913 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-26 13:22:01,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 15 events. 2/15 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 5. Up to 2 conditions per place. [2021-03-26 13:22:01,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 18 places, 16 transitions, 40 flow [2021-03-26 13:22:01,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 15 places, 13 transitions, 32 flow [2021-03-26 13:22:01,920 INFO L170 etLargeBlockEncoding]: Petri net LBE is using conditional semantic-based independence relation. [2021-03-26 13:22:01,932 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 15 places, 13 transitions, 32 flow [2021-03-26 13:22:01,934 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 15 places, 13 transitions, 32 flow [2021-03-26 13:22:01,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 15 places, 13 transitions, 32 flow [2021-03-26 13:22:01,939 INFO L129 PetriNetUnfolder]: 2/13 cut-off events. [2021-03-26 13:22:01,940 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-26 13:22:01,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18 conditions, 13 events. 2/13 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 5. Up to 2 conditions per place. [2021-03-26 13:22:01,941 INFO L142 LiptonReduction]: Number of co-enabled transitions 4 [2021-03-26 13:22:02,049 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-26 13:22:02,049 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-26 13:22:02,051 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 132 [2021-03-26 13:22:02,059 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-26 13:22:02,060 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-26 13:22:02,060 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-26 13:22:02,060 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-26 13:22:02,061 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-26 13:22:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-26 13:22:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1381999666, now seen corresponding path program 1 times [2021-03-26 13:22:02,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-26 13:22:02,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222836317] [2021-03-26 13:22:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-26 13:22:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-26 13:22:02,194 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-26 13:22:02,195 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-26 13:22:02,196 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-26 13:22:02,197 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-26 13:22:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-26 13:22:02,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222836317] [2021-03-26 13:22:02,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-26 13:22:02,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-26 13:22:02,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472902271] [2021-03-26 13:22:02,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-26 13:22:02,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-26 13:22:02,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-26 13:22:02,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-26 13:22:02,223 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 20 [2021-03-26 13:22:02,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 28 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-03-26 13:22:02,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-26 13:22:02,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 20 [2021-03-26 13:22:02,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-26 13:22:02,250 INFO L129 PetriNetUnfolder]: 1/18 cut-off events. [2021-03-26 13:22:02,250 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-26 13:22:02,251 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 18 events. 1/18 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 6. Up to 7 conditions per place. [2021-03-26 13:22:02,252 INFO L132 encePairwiseOnDemand]: 17/20 looper letters, 9 selfloop transitions, 2 changer transitions 0/15 dead transitions. [2021-03-26 13:22:02,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 15 transitions, 64 flow [2021-03-26 13:22:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-26 13:22:02,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-26 13:22:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 36 transitions. [2021-03-26 13:22:02,261 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6 [2021-03-26 13:22:02,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 36 transitions. [2021-03-26 13:22:02,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 36 transitions. [2021-03-26 13:22:02,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-26 13:22:02,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 36 transitions. [2021-03-26 13:22:02,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-03-26 13:22:02,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-03-26 13:22:02,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-03-26 13:22:02,274 INFO L185 Difference]: Start difference. First operand has 14 places, 11 transitions, 28 flow. Second operand 3 states and 36 transitions. [2021-03-26 13:22:02,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 15 transitions, 64 flow [2021-03-26 13:22:02,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 15 transitions, 56 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-26 13:22:02,278 INFO L241 Difference]: Finished difference. Result has 15 places, 12 transitions, 36 flow [2021-03-26 13:22:02,280 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=15, PETRI_TRANSITIONS=12} [2021-03-26 13:22:02,281 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, 1 predicate places. [2021-03-26 13:22:02,281 INFO L170 etLargeBlockEncoding]: Petri net LBE is using conditional semantic-based independence relation. [2021-03-26 13:22:02,281 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 15 places, 12 transitions, 36 flow [2021-03-26 13:22:02,281 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 15 places, 12 transitions, 36 flow [2021-03-26 13:22:02,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 15 places, 12 transitions, 36 flow [2021-03-26 13:22:02,298 INFO L129 PetriNetUnfolder]: 1/18 cut-off events. [2021-03-26 13:22:02,298 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-26 13:22:02,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 18 events. 1/18 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 11. Up to 4 conditions per place. [2021-03-26 13:22:02,299 INFO L142 LiptonReduction]: Number of co-enabled transitions 4 [2021-03-26 13:22:02,365 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-26 13:22:02,365 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-26 13:22:02,366 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 85 [2021-03-26 13:22:02,368 INFO L480 AbstractCegarLoop]: Abstraction has has 13 places, 10 transitions, 32 flow [2021-03-26 13:22:02,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-03-26 13:22:02,369 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-26 13:22:02,369 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-03-26 13:22:02,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-26 13:22:02,369 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-26 13:22:02,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-26 13:22:02,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1720846580, now seen corresponding path program 1 times [2021-03-26 13:22:02,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-26 13:22:02,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822003614] [2021-03-26 13:22:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-26 13:22:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-26 13:22:02,391 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-26 13:22:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-26 13:22:02,410 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-26 13:22:02,431 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-26 13:22:02,431 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-26 13:22:02,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-26 13:22:02,453 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.03 01:22:02 BasicIcfg [2021-03-26 13:22:02,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-26 13:22:02,455 INFO L168 Benchmark]: Toolchain (without parser) took 860.49 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 194.0 MB in the end (delta: 42.6 MB). Peak memory consumption was 43.7 MB. Max. memory is 16.0 GB. [2021-03-26 13:22:02,456 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.47 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-26 13:22:02,457 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.45 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-26 13:22:02,458 INFO L168 Benchmark]: Boogie Preprocessor took 13.28 ms. Allocated memory is still 255.9 MB. Free memory was 235.2 MB in the beginning and 234.2 MB in the end (delta: 974.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-26 13:22:02,459 INFO L168 Benchmark]: RCFGBuilder took 191.79 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 238.7 MB in the end (delta: -4.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.0 GB. [2021-03-26 13:22:02,463 INFO L168 Benchmark]: TraceAbstraction took 629.15 ms. Allocated memory is still 255.9 MB. Free memory was 238.7 MB in the beginning and 194.0 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.0 MB. Max. memory is 16.0 GB. [2021-03-26 13:22:02,466 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 0.47 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.45 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.28 ms. Allocated memory is still 255.9 MB. Free memory was 235.2 MB in the beginning and 234.2 MB in the end (delta: 974.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 191.79 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 238.7 MB in the end (delta: -4.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 629.15 ms. Allocated memory is still 255.9 MB. Free memory was 238.7 MB in the beginning and 194.0 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 114.8ms, 15 PlacesBefore, 14 PlacesAfterwards, 13 TransitionsBefore, 11 TransitionsAfterwards, 4 CoEnabledTransitionPairs, 2 FixpointIterations, 2 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 4 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: ConditionTransformingIndependenceRelation.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] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.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] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.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] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.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] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.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.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: 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] , 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, Eliminated conditions: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 84.0ms, 15 PlacesBefore, 13 PlacesAfterwards, 12 TransitionsBefore, 10 TransitionsAfterwards, 4 CoEnabledTransitionPairs, 3 FixpointIterations, 2 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: ConditionTransformingIndependenceRelation.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] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.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] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.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] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.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] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.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.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: 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] , 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, Eliminated conditions: 0 - CounterExampleResult [Line: 25]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 res := 0; VAL [res=0] [L18] 0 x := 0; VAL [res=0, x=0] [L20] COND TRUE 0 x < 3 VAL [res=0, x=0] [L21] FORK 0 fork x foo(); VAL [res=0, x=0] [L22] 0 resOld := res; VAL [res=0, resOld=0, x=0] [L35] 1 res := y; VAL [res=2, res=0, resOld=0, x=0, y=2] [L23] JOIN 1 join x assign res; VAL [res=2, res=2, resOld=0, x=0, y=2] [L24] COND FALSE 0 !(x > 0) VAL [res=2, res=2, resOld=0, x=0, y=2] [L27] 0 x := x + 1; [L20] COND TRUE 0 x < 3 VAL [res=2, res=2, resOld=0, x=1, y=2] [L21] FORK 0 fork x foo(); VAL [res=2, resOld=0, x=1] [L22] 0 resOld := res; VAL [res=2, resOld=2, x=1] [L35] 1 res := y; VAL [res=3, res=2, resOld=2, x=1, y=3] [L23] JOIN 1 join x assign res; VAL [res=3, res=3, resOld=2, x=1, y=3] [L24] COND TRUE 0 x > 0 [L25] 0 assert resOld == res; VAL [res=3, res=3, resOld=2, x=1, y=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 546.5ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 61.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 165.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 10 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=1, InterpolantAutomatonStates: 3, 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: 7.5ms SsaConstructionTime, 36.1ms SatisfiabilityAnalysisTime, 39.1ms InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 22 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...