/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/regression/fork_in_loop.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 22:20:55,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 22:20:55,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 22:20:55,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 22:20:55,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 22:20:55,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 22:20:55,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 22:20:55,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 22:20:55,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 22:20:55,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 22:20:55,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 22:20:55,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 22:20:55,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 22:20:55,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 22:20:55,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 22:20:55,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 22:20:55,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 22:20:55,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 22:20:55,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 22:20:55,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 22:20:55,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 22:20:55,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 22:20:55,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 22:20:55,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 22:20:55,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 22:20:55,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 22:20:55,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 22:20:55,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 22:20:55,628 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 22:20:55,653 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 22:20:55,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 22:20:55,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 22:20:55,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 22:20:55,655 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 22:20:55,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 22:20:55,655 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 22:20:55,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 22:20:55,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 22:20:55,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 22:20:55,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 22:20:55,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 22:20:55,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 22:20:55,656 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 22:20:55,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 22:20:55,656 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 22:20:55,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 22:20:55,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 22:20:55,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 22:20:55,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 22:20:55,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 22:20:55,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 22:20:55,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 22:20:55,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 22:20:55,657 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 22:20:55,657 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 22:20:55,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 22:20:55,658 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 22:20:55,658 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 22:20:55,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 22:20:55,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 22:20:55,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 22:20:55,969 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 22:20:55,970 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 22:20:55,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_in_loop.bpl [2021-03-24 22:20:55,971 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_in_loop.bpl' [2021-03-24 22:20:56,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 22:20:56,080 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 22:20:56,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 22:20:56,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 22:20:56,082 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 22:20:56,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:56" (1/1) ... [2021-03-24 22:20:56,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:56" (1/1) ... [2021-03-24 22:20:56,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 22:20:56,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 22:20:56,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 22:20:56,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 22:20:56,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:56" (1/1) ... [2021-03-24 22:20:56,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:56" (1/1) ... [2021-03-24 22:20:56,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:56" (1/1) ... [2021-03-24 22:20:56,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:56" (1/1) ... [2021-03-24 22:20:56,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:56" (1/1) ... [2021-03-24 22:20:56,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:56" (1/1) ... [2021-03-24 22:20:56,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:56" (1/1) ... [2021-03-24 22:20:56,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 22:20:56,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 22:20:56,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 22:20:56,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 22:20:56,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:56" (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 22:20:56,190 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-03-24 22:20:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-24 22:20:56,191 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-24 22:20:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 22:20:56,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 22:20:56,193 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 22:20:56,294 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 22:20:56,294 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 22:20:56,296 INFO L202 PluginConnector]: Adding new model fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:20:56 BoogieIcfgContainer [2021-03-24 22:20:56,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 22:20:56,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 22:20:56,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 22:20:56,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 22:20:56,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:56" (1/2) ... [2021-03-24 22:20:56,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe3493d and model type fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 10:20:56, skipping insertion in model container [2021-03-24 22:20:56,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:20:56" (2/2) ... [2021-03-24 22:20:56,303 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_in_loop.bpl [2021-03-24 22:20:56,308 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 22:20:56,311 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 22:20:56,312 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 22:20:56,329 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,329 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,329 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,330 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,332 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,336 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,345 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-03-24 22:20:56,361 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-24 22:20:56,380 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:20:56,380 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:20:56,380 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:20:56,380 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:20:56,381 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:20:56,381 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:20:56,381 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:20:56,381 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:20:56,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 25 transitions, 78 flow [2021-03-24 22:20:56,408 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-03-24 22:20:56,409 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 22:20:56,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 23 events. 0/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 22:20:56,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 25 transitions, 78 flow [2021-03-24 22:20:56,414 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 16 transitions, 45 flow [2021-03-24 22:20:56,415 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:20:56,435 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 21 places, 16 transitions, 45 flow [2021-03-24 22:20:56,438 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 21 places, 16 transitions, 45 flow [2021-03-24 22:20:56,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 16 transitions, 45 flow [2021-03-24 22:20:56,445 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-03-24 22:20:56,446 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-24 22:20:56,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 20 events. 0/20 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 17 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 22:20:56,447 INFO L142 LiptonReduction]: Number of co-enabled transitions 32 [2021-03-24 22:20:56,576 INFO L154 LiptonReduction]: Checked pairs total: 12 [2021-03-24 22:20:56,576 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 22:20:56,578 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 164 [2021-03-24 22:20:56,592 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-24 22:20:56,592 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-24 22:20:56,593 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:20:56,593 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2021-03-24 22:20:56,593 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:20:56,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:20:56,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1921556130, now seen corresponding path program 1 times [2021-03-24 22:20:56,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:20:56,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866356651] [2021-03-24 22:20:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:20:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:20:56,727 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:20:56,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:20:56,738 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:20:56,738 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:20:56,761 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:20:56,762 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:20:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:20:56,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866356651] [2021-03-24 22:20:56,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:20:56,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 22:20:56,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533970396] [2021-03-24 22:20:56,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 22:20:56,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:20:56,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 22:20:56,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-24 22:20:56,793 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 29 [2021-03-24 22:20:56,795 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 22:20:56,795 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:20:56,795 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 29 [2021-03-24 22:20:56,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:20:56,858 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-24 22:20:56,858 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-24 22:20:56,859 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 13 events. 0/13 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. 0/12 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-03-24 22:20:56,860 INFO L132 encePairwiseOnDemand]: 24/29 looper letters, 5 selfloop transitions, 4 changer transitions 1/13 dead transitions. [2021-03-24 22:20:56,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 13 transitions, 57 flow [2021-03-24 22:20:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 22:20:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 22:20:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2021-03-24 22:20:56,873 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5775862068965517 [2021-03-24 22:20:56,873 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 67 transitions. [2021-03-24 22:20:56,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 67 transitions. [2021-03-24 22:20:56,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:20:56,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 67 transitions. [2021-03-24 22:20:56,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 22:20:56,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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 22:20:56,883 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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 22:20:56,884 INFO L185 Difference]: Start difference. First operand has 18 places, 13 transitions, 39 flow. Second operand 4 states and 67 transitions. [2021-03-24 22:20:56,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 13 transitions, 57 flow [2021-03-24 22:20:56,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 13 transitions, 53 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 22:20:56,889 INFO L241 Difference]: Finished difference. Result has 19 places, 12 transitions, 44 flow [2021-03-24 22:20:56,891 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=31, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=44, PETRI_PLACES=19, PETRI_TRANSITIONS=12} [2021-03-24 22:20:56,891 INFO L343 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2021-03-24 22:20:56,892 INFO L480 AbstractCegarLoop]: Abstraction has has 19 places, 12 transitions, 44 flow [2021-03-24 22:20:56,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 22:20:56,892 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:20:56,892 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:20:56,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 22:20:56,893 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:20:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:20:56,894 INFO L82 PathProgramCache]: Analyzing trace with hash -753814005, now seen corresponding path program 1 times [2021-03-24 22:20:56,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:20:56,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254062941] [2021-03-24 22:20:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:20:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:20:56,915 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:20:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:20:56,931 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:20:56,945 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:20:56,946 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:20:56,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 22:20:56,949 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:20:56,949 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-24 22:20:56,958 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,959 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,959 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,959 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,960 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,961 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,961 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,961 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,962 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,963 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,965 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,966 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:20:56,980 INFO L149 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2021-03-24 22:20:56,980 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-24 22:20:56,983 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:20:56,983 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:20:56,984 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:20:56,984 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:20:56,984 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:20:56,984 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:20:56,984 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:20:56,984 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:20:56,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 37 places, 37 transitions, 134 flow [2021-03-24 22:20:57,021 INFO L129 PetriNetUnfolder]: 14/111 cut-off events. [2021-03-24 22:20:57,022 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2021-03-24 22:20:57,027 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 111 events. 14/111 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 402 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 80. Up to 15 conditions per place. [2021-03-24 22:20:57,030 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 37 transitions, 134 flow [2021-03-24 22:20:57,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 33 transitions, 120 flow [2021-03-24 22:20:57,033 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:20:57,034 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 35 places, 33 transitions, 120 flow [2021-03-24 22:20:57,039 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 35 places, 33 transitions, 120 flow [2021-03-24 22:20:57,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 35 places, 33 transitions, 120 flow [2021-03-24 22:20:57,068 INFO L129 PetriNetUnfolder]: 14/101 cut-off events. [2021-03-24 22:20:57,068 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2021-03-24 22:20:57,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 101 events. 14/101 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 357 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 83. Up to 15 conditions per place. [2021-03-24 22:20:57,071 INFO L142 LiptonReduction]: Number of co-enabled transitions 280 [2021-03-24 22:20:57,146 INFO L154 LiptonReduction]: Checked pairs total: 86 [2021-03-24 22:20:57,146 INFO L156 LiptonReduction]: Total number of compositions: 5 [2021-03-24 22:20:57,146 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 113 [2021-03-24 22:20:57,150 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-24 22:20:57,150 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-03-24 22:20:57,150 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:20:57,151 INFO L263 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2021-03-24 22:20:57,151 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:20:57,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:20:57,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1774446021, now seen corresponding path program 1 times [2021-03-24 22:20:57,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:20:57,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592696449] [2021-03-24 22:20:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:20:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:20:57,182 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:20:57,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:20:57,188 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:20:57,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:20:57,193 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:20:57,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:20:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-24 22:20:57,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592696449] [2021-03-24 22:20:57,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:20:57,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 22:20:57,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46909679] [2021-03-24 22:20:57,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 22:20:57,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:20:57,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 22:20:57,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-24 22:20:57,197 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 42 [2021-03-24 22:20:57,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 22:20:57,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:20:57,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 42 [2021-03-24 22:20:57,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:20:57,240 INFO L129 PetriNetUnfolder]: 1/27 cut-off events. [2021-03-24 22:20:57,241 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-03-24 22:20:57,241 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 27 events. 1/27 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 59. Up to 9 conditions per place. [2021-03-24 22:20:57,243 INFO L132 encePairwiseOnDemand]: 36/42 looper letters, 9 selfloop transitions, 4 changer transitions 2/24 dead transitions. [2021-03-24 22:20:57,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 108 flow [2021-03-24 22:20:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 22:20:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 22:20:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2021-03-24 22:20:57,247 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2021-03-24 22:20:57,247 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 112 transitions. [2021-03-24 22:20:57,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 112 transitions. [2021-03-24 22:20:57,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:20:57,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 112 transitions. [2021-03-24 22:20:57,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 22:20:57,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 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 22:20:57,251 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 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 22:20:57,251 INFO L185 Difference]: Start difference. First operand has 30 places, 28 transitions, 110 flow. Second operand 4 states and 112 transitions. [2021-03-24 22:20:57,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 108 flow [2021-03-24 22:20:57,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 24 transitions, 104 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 22:20:57,253 INFO L241 Difference]: Finished difference. Result has 29 places, 21 transitions, 89 flow [2021-03-24 22:20:57,254 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2021-03-24 22:20:57,254 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2021-03-24 22:20:57,254 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 89 flow [2021-03-24 22:20:57,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 22:20:57,256 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:20:57,256 INFO L263 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:20:57,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 22:20:57,256 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:20:57,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:20:57,257 INFO L82 PathProgramCache]: Analyzing trace with hash -721300470, now seen corresponding path program 1 times [2021-03-24 22:20:57,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:20:57,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524442490] [2021-03-24 22:20:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:20:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:20:57,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:20:57,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:20:57,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:20:57,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:20:57,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:20:57,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:20:57,315 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:20:57,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:20:57,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:20:57,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:20:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-24 22:20:57,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524442490] [2021-03-24 22:20:57,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:20:57,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:20:57,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420390528] [2021-03-24 22:20:57,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 22:20:57,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:20:57,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 22:20:57,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-24 22:20:57,327 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 42 [2021-03-24 22:20:57,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 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 22:20:57,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:20:57,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 42 [2021-03-24 22:20:57,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:20:57,366 INFO L129 PetriNetUnfolder]: 1/23 cut-off events. [2021-03-24 22:20:57,366 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-03-24 22:20:57,367 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 23 events. 1/23 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 1/24 useless extension candidates. Maximal degree in co-relation 59. Up to 7 conditions per place. [2021-03-24 22:20:57,367 INFO L132 encePairwiseOnDemand]: 36/42 looper letters, 8 selfloop transitions, 5 changer transitions 1/22 dead transitions. [2021-03-24 22:20:57,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 117 flow [2021-03-24 22:20:57,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 22:20:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 22:20:57,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2021-03-24 22:20:57,372 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2021-03-24 22:20:57,372 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 135 transitions. [2021-03-24 22:20:57,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 135 transitions. [2021-03-24 22:20:57,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:20:57,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 135 transitions. [2021-03-24 22:20:57,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 22:20:57,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 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 22:20:57,375 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 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 22:20:57,375 INFO L185 Difference]: Start difference. First operand has 29 places, 21 transitions, 89 flow. Second operand 5 states and 135 transitions. [2021-03-24 22:20:57,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 117 flow [2021-03-24 22:20:57,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 22 transitions, 110 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-24 22:20:57,379 INFO L241 Difference]: Finished difference. Result has 31 places, 20 transitions, 95 flow [2021-03-24 22:20:57,379 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=95, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2021-03-24 22:20:57,380 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2021-03-24 22:20:57,380 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 95 flow [2021-03-24 22:20:57,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 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 22:20:57,381 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:20:57,384 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:20:57,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 22:20:57,384 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:20:57,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:20:57,384 INFO L82 PathProgramCache]: Analyzing trace with hash 931910734, now seen corresponding path program 1 times [2021-03-24 22:20:57,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:20:57,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981751073] [2021-03-24 22:20:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:20:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:20:57,392 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:20:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:20:57,398 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:20:57,401 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:20:57,401 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:20:57,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 22:20:57,414 INFO L202 PluginConnector]: Adding new model fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 10:20:57 BasicIcfg [2021-03-24 22:20:57,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 22:20:57,415 INFO L168 Benchmark]: Toolchain (without parser) took 1334.96 ms. Allocated memory is still 308.3 MB. Free memory was 288.2 MB in the beginning and 221.7 MB in the end (delta: 66.5 MB). Peak memory consumption was 69.4 MB. Max. memory is 16.0 GB. [2021-03-24 22:20:57,415 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 308.3 MB. Free memory was 289.2 MB in the beginning and 289.1 MB in the end (delta: 76.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:20:57,416 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.42 ms. Allocated memory is still 308.3 MB. Free memory was 288.1 MB in the beginning and 286.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:20:57,416 INFO L168 Benchmark]: Boogie Preprocessor took 17.10 ms. Allocated memory is still 308.3 MB. Free memory was 286.7 MB in the beginning and 285.8 MB in the end (delta: 897.0 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-03-24 22:20:57,417 INFO L168 Benchmark]: RCFGBuilder took 165.67 ms. Allocated memory is still 308.3 MB. Free memory was 285.7 MB in the beginning and 276.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-24 22:20:57,417 INFO L168 Benchmark]: TraceAbstraction took 1116.59 ms. Allocated memory is still 308.3 MB. Free memory was 275.9 MB in the beginning and 221.7 MB in the end (delta: 54.3 MB). Peak memory consumption was 56.8 MB. Max. memory is 16.0 GB. [2021-03-24 22:20:57,419 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 308.3 MB. Free memory was 289.2 MB in the beginning and 289.1 MB in the end (delta: 76.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.42 ms. Allocated memory is still 308.3 MB. Free memory was 288.1 MB in the beginning and 286.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.10 ms. Allocated memory is still 308.3 MB. Free memory was 286.7 MB in the beginning and 285.8 MB in the end (delta: 897.0 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 165.67 ms. Allocated memory is still 308.3 MB. Free memory was 285.7 MB in the beginning and 276.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1116.59 ms. Allocated memory is still 308.3 MB. Free memory was 275.9 MB in the beginning and 221.7 MB in the end (delta: 54.3 MB). Peak memory consumption was 56.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 138.6ms, 21 PlacesBefore, 18 PlacesAfterwards, 16 TransitionsBefore, 13 TransitionsAfterwards, 32 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 1 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 12 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12, positive: 12, positive conditional: 0, positive unconditional: 12, 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: 12, positive: 12, positive conditional: 0, positive unconditional: 12, 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: 12, positive: 12, positive conditional: 0, positive unconditional: 12, 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: 12, positive: 12, positive conditional: 0, positive unconditional: 12, 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: 12, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 12, unknown conditional: 0, unknown unconditional: 12] , 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 107.4ms, 35 PlacesBefore, 30 PlacesAfterwards, 33 TransitionsBefore, 28 TransitionsAfterwards, 280 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 5 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 86 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 86, positive: 86, positive conditional: 0, positive unconditional: 86, 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: 86, positive: 86, positive conditional: 0, positive unconditional: 86, 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: 86, positive: 86, positive conditional: 0, positive unconditional: 86, 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: 86, positive: 86, positive conditional: 0, positive unconditional: 86, 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: 86, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 86, unknown conditional: 0, unknown unconditional: 86] , 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 - CounterExampleResult [Line: 35]: assertion can be violated assertion can be violated We found a FailurePath: [L20] 0 x := 1; VAL [x=1] [L22] COND TRUE 0 x < 2 VAL [x=1] [L23] FORK 0 fork x foo(x); VAL [i=1, x=1] [L42] 1 y := 4; [L24] 0 x := x + 1; VAL [i=1, x=2, y=4] [L22] COND FALSE 0 !(x < 2) [L26] 0 x := 1; VAL [i=1, x=1, y=4] [L27] JOIN 1 join x; VAL [i=1, x=1, y=4] [L28] COND TRUE 0 x < 3 VAL [i=1, x=1, y=4] [L29] FORK 0 fork x foo(x); VAL [i=1, x=1, y=4] [L30] 0 x := x + 1; VAL [i=1, x=2, y=4] [L28] COND TRUE 0 x < 3 VAL [i=1, x=2, y=4] [L29] FORK 0 fork x foo(x); VAL [i=2, x=2, y=4] [L42] 3 y := 4; [L42] 2 y := 4; [L30] 0 x := x + 1; VAL [i=2, x=3, y=4] [L28] COND FALSE 0 !(x < 3) VAL [i=2, x=3, y=4] [L33] JOIN 2 join 1; VAL [i=2, x=3, y=4] [L34] JOIN 3 join 2; VAL [i=2, x=3, y=4] [L35] 0 assert false; VAL [i=2, x=3, y=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 2 CEGAR loops. EmptinessCheckTime: 6.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 992.9ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 222.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 371.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 15 SDslu, 0 SDs, 0 SdLazy, 63 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=0, InterpolantAutomatonStates: 13, 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: 14.5ms SsaConstructionTime, 62.4ms SatisfiabilityAnalysisTime, 136.9ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 61 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 17/17 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...