/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-RepeatedSemanticLbeWithPredicates.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-6f4246e9f5583d222ebb38ff8175c901f3a528f0-6f4246e [2021-04-29 03:55:16,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-29 03:55:16,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-29 03:55:17,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-29 03:55:17,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-29 03:55:17,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-29 03:55:17,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-29 03:55:17,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-29 03:55:17,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-29 03:55:17,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-29 03:55:17,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-29 03:55:17,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-29 03:55:17,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-29 03:55:17,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-29 03:55:17,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-29 03:55:17,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-29 03:55:17,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-29 03:55:17,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-29 03:55:17,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-29 03:55:17,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-29 03:55:17,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-29 03:55:17,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-29 03:55:17,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-29 03:55:17,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-29 03:55:17,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-29 03:55:17,098 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-RepeatedSemanticLbeWithPredicates.epf [2021-04-29 03:55:17,151 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-29 03:55:17,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-29 03:55:17,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-29 03:55:17,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-29 03:55:17,154 INFO L138 SettingsManager]: * Use SBE=true [2021-04-29 03:55:17,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-29 03:55:17,154 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-29 03:55:17,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-29 03:55:17,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-29 03:55:17,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-29 03:55:17,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-29 03:55:17,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-29 03:55:17,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-29 03:55:17,156 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-29 03:55:17,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-29 03:55:17,157 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-29 03:55:17,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-29 03:55:17,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-29 03:55:17,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-29 03:55:17,158 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-29 03:55:17,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-29 03:55:17,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-29 03:55:17,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-29 03:55:17,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-29 03:55:17,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-29 03:55:17,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-29 03:55:17,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-29 03:55:17,160 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=SEMANTIC_BASED_MOVER_CHECK_WITH_PREDICATES [2021-04-29 03:55:17,161 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-04-29 03:55:17,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-04-29 03:55:17,161 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-29 03:55:17,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-29 03:55:17,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-29 03:55:17,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-29 03:55:17,549 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-29 03:55:17,551 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-29 03:55:17,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl [2021-04-29 03:55:17,552 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl' [2021-04-29 03:55:17,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-29 03:55:17,628 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-29 03:55:17,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-29 03:55:17,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-29 03:55:17,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-29 03:55:17,648 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 29.04 03:55:17" (1/1) ... [2021-04-29 03:55:17,657 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 29.04 03:55:17" (1/1) ... [2021-04-29 03:55:17,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-29 03:55:17,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-29 03:55:17,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-29 03:55:17,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-29 03:55:17,681 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 29.04 03:55:17" (1/1) ... [2021-04-29 03:55:17,681 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 29.04 03:55:17" (1/1) ... [2021-04-29 03:55:17,682 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 29.04 03:55:17" (1/1) ... [2021-04-29 03:55:17,682 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 29.04 03:55:17" (1/1) ... [2021-04-29 03:55:17,685 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 29.04 03:55:17" (1/1) ... [2021-04-29 03:55:17,690 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 29.04 03:55:17" (1/1) ... [2021-04-29 03:55:17,691 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 29.04 03:55:17" (1/1) ... [2021-04-29 03:55:17,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-29 03:55:17,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-29 03:55:17,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-29 03:55:17,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-29 03:55:17,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:55:17" (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 [2021-04-29 03:55:17,812 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-04-29 03:55:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-04-29 03:55:17,813 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-04-29 03:55:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-29 03:55:17,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-29 03:55:17,815 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-29 03:55:18,035 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-29 03:55:18,035 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-29 03:55:18,037 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 03:55:18 BoogieIcfgContainer [2021-04-29 03:55:18,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-29 03:55:18,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-29 03:55:18,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-29 03:55:18,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-29 03:55:18,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:55:17" (1/2) ... [2021-04-29 03:55:18,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1596fe2a and model type fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 03:55:18, skipping insertion in model container [2021-04-29 03:55:18,045 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 29.04 03:55:18" (2/2) ... [2021-04-29 03:55:18,047 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_unchanged_local_variables2.bpl [2021-04-29 03:55:18,054 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-29 03:55:18,059 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-29 03:55:18,060 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-29 03:55:18,093 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:55:18,094 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:55:18,094 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:55:18,096 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:55:18,100 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:55:18,101 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:55:18,113 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-04-29 03:55:18,138 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-04-29 03:55:18,189 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-29 03:55:18,190 INFO L377 AbstractCegarLoop]: Hoare is false [2021-04-29 03:55:18,190 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-29 03:55:18,190 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-29 03:55:18,191 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-29 03:55:18,191 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-29 03:55:18,191 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-29 03:55:18,191 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-29 03:55:18,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 18 places, 16 transitions, 40 flow [2021-04-29 03:55:18,240 INFO L129 PetriNetUnfolder]: 2/15 cut-off events. [2021-04-29 03:55:18,241 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-04-29 03:55:18,244 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. [2021-04-29 03:55:18,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 18 places, 16 transitions, 40 flow [2021-04-29 03:55:18,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 15 places, 13 transitions, 32 flow [2021-04-29 03:55:18,251 INFO L171 etLargeBlockEncoding]: Petri net LBE is using conditional semantic-based independence relation. [2021-04-29 03:55:18,270 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 15 places, 13 transitions, 32 flow [2021-04-29 03:55:18,275 INFO L133 LiptonReduction]: Starting Lipton reduction on Petri net that has 15 places, 13 transitions, 32 flow [2021-04-29 03:55:18,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 15 places, 13 transitions, 32 flow [2021-04-29 03:55:18,282 INFO L129 PetriNetUnfolder]: 2/13 cut-off events. [2021-04-29 03:55:18,282 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-04-29 03:55:18,282 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. [2021-04-29 03:55:18,285 INFO L146 LiptonReduction]: Number of co-enabled transitions 4 [2021-04-29 03:55:18,689 INFO L158 LiptonReduction]: Checked pairs total: 1 [2021-04-29 03:55:18,690 INFO L160 LiptonReduction]: Total number of compositions: 9 [2021-04-29 03:55:18,694 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 444 [2021-04-29 03:55:18,707 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2021-04-29 03:55:18,707 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-04-29 03:55:18,708 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-04-29 03:55:18,708 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-04-29 03:55:18,709 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-29 03:55:18,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-29 03:55:18,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1965402965, now seen corresponding path program 1 times [2021-04-29 03:55:18,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-29 03:55:18,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186999768] [2021-04-29 03:55:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-29 03:55:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-29 03:55:18,875 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-29 03:55:18,877 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-29 03:55:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-29 03:55:18,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186999768] [2021-04-29 03:55:18,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-29 03:55:18,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-04-29 03:55:18,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821133225] [2021-04-29 03:55:18,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-29 03:55:18,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-29 03:55:18,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-29 03:55:18,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-29 03:55:18,917 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 25 [2021-04-29 03:55:18,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 13 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-04-29 03:55:18,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-04-29 03:55:18,920 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 25 [2021-04-29 03:55:18,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-04-29 03:55:18,958 INFO L129 PetriNetUnfolder]: 2/21 cut-off events. [2021-04-29 03:55:18,959 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-04-29 03:55:18,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 21 events. 2/21 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 10. Up to 10 conditions per place. [2021-04-29 03:55:18,960 INFO L132 encePairwiseOnDemand]: 19/25 looper letters, 6 selfloop transitions, 2 changer transitions 8/18 dead transitions. [2021-04-29 03:55:18,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 18 transitions, 76 flow [2021-04-29 03:55:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-29 03:55:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-04-29 03:55:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2021-04-29 03:55:18,974 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2021-04-29 03:55:18,975 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 43 transitions. [2021-04-29 03:55:18,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 43 transitions. [2021-04-29 03:55:18,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-04-29 03:55:18,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 43 transitions. [2021-04-29 03:55:18,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-29 03:55:18,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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) [2021-04-29 03:55:18,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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) [2021-04-29 03:55:18,988 INFO L185 Difference]: Start difference. First operand has 16 places, 13 transitions, 32 flow. Second operand 3 states and 43 transitions. [2021-04-29 03:55:18,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 18 transitions, 76 flow [2021-04-29 03:55:18,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 18 transitions, 68 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-04-29 03:55:18,994 INFO L241 Difference]: Finished difference. Result has 17 places, 8 transitions, 28 flow [2021-04-29 03:55:18,996 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=28, PETRI_PLACES=17, PETRI_TRANSITIONS=8} [2021-04-29 03:55:18,997 INFO L343 CegarLoopForPetriNet]: 16 programPoint places, 1 predicate places. [2021-04-29 03:55:18,998 INFO L171 etLargeBlockEncoding]: Petri net LBE is using conditional semantic-based independence relation. [2021-04-29 03:55:18,998 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 17 places, 8 transitions, 28 flow [2021-04-29 03:55:18,998 INFO L133 LiptonReduction]: Starting Lipton reduction on Petri net that has 17 places, 8 transitions, 28 flow [2021-04-29 03:55:18,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 11 places, 8 transitions, 28 flow [2021-04-29 03:55:19,004 INFO L129 PetriNetUnfolder]: 1/12 cut-off events. [2021-04-29 03:55:19,004 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-04-29 03:55:19,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 12 events. 1/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 9. Up to 4 conditions per place. [2021-04-29 03:55:19,005 INFO L146 LiptonReduction]: Number of co-enabled transitions 2 [2021-04-29 03:55:19,006 INFO L158 LiptonReduction]: Checked pairs total: 0 [2021-04-29 03:55:19,006 INFO L160 LiptonReduction]: Total number of compositions: 0 [2021-04-29 03:55:19,006 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 8 [2021-04-29 03:55:19,008 INFO L480 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 28 flow [2021-04-29 03:55:19,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-04-29 03:55:19,008 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-04-29 03:55:19,008 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1] [2021-04-29 03:55:19,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-29 03:55:19,009 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-29 03:55:19,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-29 03:55:19,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1318001748, now seen corresponding path program 1 times [2021-04-29 03:55:19,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-29 03:55:19,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355943005] [2021-04-29 03:55:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-29 03:55:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-29 03:55:19,024 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-29 03:55:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-29 03:55:19,035 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-29 03:55:19,062 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-04-29 03:55:19,062 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-04-29 03:55:19,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-29 03:55:19,082 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.04 03:55:19 BasicIcfg [2021-04-29 03:55:19,083 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-29 03:55:19,085 INFO L168 Benchmark]: Toolchain (without parser) took 1500.99 ms. Allocated memory is still 302.0 MB. Free memory was 271.9 MB in the beginning and 269.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.0 GB. [2021-04-29 03:55:19,086 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.28 ms. Allocated memory is still 302.0 MB. Free memory is still 272.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-29 03:55:19,087 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.06 ms. Allocated memory is still 302.0 MB. Free memory was 268.8 MB in the beginning and 267.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-29 03:55:19,088 INFO L168 Benchmark]: Boogie Preprocessor took 23.39 ms. Allocated memory is still 302.0 MB. Free memory was 267.4 MB in the beginning and 266.5 MB in the end (delta: 871.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-29 03:55:19,089 INFO L168 Benchmark]: RCFGBuilder took 343.99 ms. Allocated memory is still 302.0 MB. Free memory was 266.4 MB in the beginning and 281.5 MB in the end (delta: -15.0 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.0 GB. [2021-04-29 03:55:19,090 INFO L168 Benchmark]: TraceAbstraction took 1043.83 ms. Allocated memory is still 302.0 MB. Free memory was 281.2 MB in the beginning and 269.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.0 GB. [2021-04-29 03:55:19,094 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 0.28 ms. Allocated memory is still 302.0 MB. Free memory is still 272.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 38.06 ms. Allocated memory is still 302.0 MB. Free memory was 268.8 MB in the beginning and 267.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 23.39 ms. Allocated memory is still 302.0 MB. Free memory was 267.4 MB in the beginning and 266.5 MB in the end (delta: 871.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 343.99 ms. Allocated memory is still 302.0 MB. Free memory was 266.4 MB in the beginning and 281.5 MB in the end (delta: -15.0 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1043.83 ms. Allocated memory is still 302.0 MB. Free memory was 281.2 MB in the beginning and 269.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 415.0ms, 15 PlacesBefore, 16 PlacesAfterwards, 13 TransitionsBefore, 13 TransitionsAfterwards, 4 CoEnabledTransitionPairs, 3 FixpointIterations, 6 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 9 TotalNumberOfCompositions, 1 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 1, positive unconditional: 0, 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: 1, positive: 1, positive conditional: 0, positive unconditional: 1, 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: 1, positive: 1, positive conditional: 0, positive unconditional: 1, 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: 1, positive: 1, positive conditional: 0, positive unconditional: 1, 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: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1, unknown conditional: 1, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 1, Positive cache size: 1, Positive conditional cache size: 1, 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: 7.6ms, 17 PlacesBefore, 11 PlacesAfterwards, 8 TransitionsBefore, 8 TransitionsAfterwards, 2 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: 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: 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: 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): 1, Positive cache size: 1, Positive conditional cache size: 1, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - CounterExampleResult [Line: 25]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 res := 0; [L18] 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] [L35] 1 res := y; [L22] 0 resOld := res; VAL [res=0, res=0, resOld=0, x=0, y=0] [L23] JOIN 1 join x assign res; VAL [res=0, res=0, resOld=0, x=0, y=0] [L24] COND FALSE 0 !(x > 0) [L27] 0 x := x + 1; [L20] COND TRUE 0 x < 3 VAL [res=0, res=0, resOld=0, x=1, y=0] [L21] FORK 0 fork x foo(); VAL [res=0, resOld=0, x=1] [L35] 1 res := y; [L22] 0 resOld := res; VAL [res=0, res=2, resOld=0, x=1, y=2] [L23] JOIN 1 join x assign res; VAL [res=2, res=2, resOld=0, x=1, y=2] [L24] COND TRUE 0 x > 0 [L25] 0 assert resOld == res; VAL [res=2, res=2, resOld=0, x=1, y=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 884.6ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 87.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 511.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 12 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, 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: 6.1ms SsaConstructionTime, 29.0ms SatisfiabilityAnalysisTime, 49.8ms InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 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...