/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_unchanged_local_variables2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 22:34:06,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 22:34:06,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 22:34:06,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 22:34:06,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 22:34:06,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 22:34:06,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 22:34:06,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 22:34:06,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 22:34:06,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 22:34:06,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 22:34:06,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 22:34:06,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 22:34:06,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 22:34:06,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 22:34:06,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 22:34:06,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 22:34:06,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 22:34:06,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 22:34:06,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 22:34:06,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 22:34:06,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 22:34:06,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 22:34:06,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 22:34:06,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-11 22:34:06,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-11 22:34:06,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-11 22:34:06,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-11 22:34:06,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-11 22:34:06,163 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-11 22:34:06,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 22:34:06,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 22:34:06,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 22:34:06,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 22:34:06,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 22:34:06,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 22:34:06,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 22:34:06,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 22:34:06,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 22:34:06,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 22:34:06,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 22:34:06,177 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 [2021-03-11 22:34:06,212 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 22:34:06,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 22:34:06,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 22:34:06,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 22:34:06,214 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 22:34:06,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 22:34:06,214 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 22:34:06,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 22:34:06,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 22:34:06,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 22:34:06,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 22:34:06,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 22:34:06,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 22:34:06,215 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 22:34:06,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 22:34:06,215 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 22:34:06,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 22:34:06,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 22:34:06,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 22:34:06,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 22:34:06,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 22:34:06,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 22:34:06,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 22:34:06,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 22:34:06,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 22:34:06,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 22:34:06,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 22:34:06,220 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 22:34:06,220 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 22:34:06,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 22:34:06,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 22:34:06,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 22:34:06,518 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 22:34:06,523 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 22:34:06,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl [2021-03-11 22:34:06,524 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl' [2021-03-11 22:34:06,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 22:34:06,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 22:34:06,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 22:34:06,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 22:34:06,559 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 22:34:06,570 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 11.03 10:34:06" (1/1) ... [2021-03-11 22:34:06,574 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 11.03 10:34:06" (1/1) ... [2021-03-11 22:34:06,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 22:34:06,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 22:34:06,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 22:34:06,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 22:34:06,587 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 11.03 10:34:06" (1/1) ... [2021-03-11 22:34:06,587 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 11.03 10:34:06" (1/1) ... [2021-03-11 22:34:06,588 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 11.03 10:34:06" (1/1) ... [2021-03-11 22:34:06,588 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 11.03 10:34:06" (1/1) ... [2021-03-11 22:34:06,589 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 11.03 10:34:06" (1/1) ... [2021-03-11 22:34:06,592 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 11.03 10:34:06" (1/1) ... [2021-03-11 22:34:06,592 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 11.03 10:34:06" (1/1) ... [2021-03-11 22:34:06,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 22:34:06,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 22:34:06,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 22:34:06,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 22:34:06,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:06" (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 [2021-03-11 22:34:06,647 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-03-11 22:34:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-11 22:34:06,647 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-11 22:34:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 22:34:06,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 22:34:06,648 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 22:34:06,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 22:34:06,790 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 22:34:06,792 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:34:06 BoogieIcfgContainer [2021-03-11 22:34:06,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 22:34:06,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 22:34:06,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 22:34:06,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 22:34:06,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:06" (1/2) ... [2021-03-11 22:34:06,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee64d37 and model type fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 10:34:06, skipping insertion in model container [2021-03-11 22:34:06,803 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 11.03 10:34:06" (2/2) ... [2021-03-11 22:34:06,804 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_unchanged_local_variables2.bpl [2021-03-11 22:34:06,812 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 22:34:06,815 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 22:34:06,816 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 22:34:06,846 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:06,847 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:06,847 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:06,849 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:06,851 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:06,852 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:06,861 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-03-11 22:34:06,876 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-11 22:34:06,913 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 22:34:06,913 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 22:34:06,913 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 22:34:06,913 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 22:34:06,913 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 22:34:06,913 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 22:34:06,913 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 22:34:06,913 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 22:34:06,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 18 places, 16 transitions, 40 flow [2021-03-11 22:34:06,945 INFO L129 PetriNetUnfolder]: 2/15 cut-off events. [2021-03-11 22:34:06,945 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-11 22:34:06,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 15 events. 2/15 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 5. Up to 2 conditions per place. [2021-03-11 22:34:06,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 18 places, 16 transitions, 40 flow [2021-03-11 22:34:06,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 15 places, 13 transitions, 32 flow [2021-03-11 22:34:06,955 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 22:34:06,966 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 15 places, 13 transitions, 32 flow [2021-03-11 22:34:06,971 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 15 places, 13 transitions, 32 flow [2021-03-11 22:34:06,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 15 places, 13 transitions, 32 flow [2021-03-11 22:34:06,980 INFO L129 PetriNetUnfolder]: 2/13 cut-off events. [2021-03-11 22:34:06,980 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-11 22:34:06,980 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18 conditions, 13 events. 2/13 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 5. Up to 2 conditions per place. [2021-03-11 22:34:06,981 INFO L116 LiptonReduction]: Number of co-enabled transitions 4 [2021-03-11 22:34:07,403 INFO L131 LiptonReduction]: Checked pairs total: 10 [2021-03-11 22:34:07,403 INFO L133 LiptonReduction]: Total number of compositions: 10 [2021-03-11 22:34:07,405 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 453 [2021-03-11 22:34:07,419 INFO L129 PetriNetUnfolder]: 1/6 cut-off events. [2021-03-11 22:34:07,420 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-11 22:34:07,420 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:34:07,420 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 22:34:07,421 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:34:07,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:34:07,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1965432755, now seen corresponding path program 1 times [2021-03-11 22:34:07,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:34:07,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688454309] [2021-03-11 22:34:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:34:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:34:07,530 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:07,532 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:34:07,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688454309] [2021-03-11 22:34:07,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:34:07,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 22:34:07,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726506717] [2021-03-11 22:34:07,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 22:34:07,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:34:07,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 22:34:07,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 22:34:07,561 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 26 [2021-03-11 22:34:07,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 10 places, 7 transitions, 20 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) [2021-03-11 22:34:07,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:34:07,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 26 [2021-03-11 22:34:07,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:34:07,595 INFO L129 PetriNetUnfolder]: 1/12 cut-off events. [2021-03-11 22:34:07,595 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-11 22:34:07,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 1/12 cut-off events. For 6/6 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 4. Up to 6 conditions per place. [2021-03-11 22:34:07,596 INFO L132 encePairwiseOnDemand]: 23/26 looper letters, 6 selfloop transitions, 2 changer transitions 0/10 dead transitions. [2021-03-11 22:34:07,597 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 10 transitions, 48 flow [2021-03-11 22:34:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 22:34:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 22:34:07,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 36 transitions. [2021-03-11 22:34:07,617 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2021-03-11 22:34:07,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 36 transitions. [2021-03-11 22:34:07,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 36 transitions. [2021-03-11 22:34:07,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:34:07,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 36 transitions. [2021-03-11 22:34:07,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:07,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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) [2021-03-11 22:34:07,626 INFO L81 ComplementDD]: Finished complementDD. Result 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) [2021-03-11 22:34:07,628 INFO L185 Difference]: Start difference. First operand has 10 places, 7 transitions, 20 flow. Second operand 3 states and 36 transitions. [2021-03-11 22:34:07,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 10 transitions, 48 flow [2021-03-11 22:34:07,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 10 transitions, 40 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 22:34:07,632 INFO L241 Difference]: Finished difference. Result has 11 places, 8 transitions, 28 flow [2021-03-11 22:34:07,634 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=8, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=28, PETRI_PLACES=11, PETRI_TRANSITIONS=8} [2021-03-11 22:34:07,634 INFO L335 CegarLoopForPetriNet]: 10 programPoint places, 1 predicate places. [2021-03-11 22:34:07,634 INFO L480 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 28 flow [2021-03-11 22:34:07,635 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) [2021-03-11 22:34:07,635 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:34:07,635 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1] [2021-03-11 22:34:07,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 22:34:07,635 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:34:07,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:34:07,636 INFO L82 PathProgramCache]: Analyzing trace with hash 546681227, now seen corresponding path program 1 times [2021-03-11 22:34:07,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:34:07,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234300936] [2021-03-11 22:34:07,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:34:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:34:07,656 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:34:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:34:07,685 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:34:07,698 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 22:34:07,698 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 22:34:07,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 22:34:07,715 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 10:34:07 BasicIcfg [2021-03-11 22:34:07,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 22:34:07,718 INFO L168 Benchmark]: Toolchain (without parser) took 1160.62 ms. Allocated memory was 255.9 MB in the beginning and 335.5 MB in the end (delta: 79.7 MB). Free memory was 236.6 MB in the beginning and 319.8 MB in the end (delta: -83.2 MB). Peak memory consumption was 53.1 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:07,718 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:34:07,720 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.79 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:34:07,720 INFO L168 Benchmark]: Boogie Preprocessor took 12.86 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 858.1 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:07,722 INFO L168 Benchmark]: RCFGBuilder took 198.27 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 241.8 MB in the end (delta: -8.1 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:07,723 INFO L168 Benchmark]: TraceAbstraction took 921.11 ms. Allocated memory was 255.9 MB in the beginning and 335.5 MB in the end (delta: 79.7 MB). Free memory was 241.1 MB in the beginning and 319.8 MB in the end (delta: -78.7 MB). Peak memory consumption was 56.6 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:07,731 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.79 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.86 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 858.1 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 198.27 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 241.8 MB in the end (delta: -8.1 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 921.11 ms. Allocated memory was 255.9 MB in the beginning and 335.5 MB in the end (delta: 79.7 MB). Free memory was 241.1 MB in the beginning and 319.8 MB in the end (delta: -78.7 MB). Peak memory consumption was 56.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 432.7ms, 15 PlacesBefore, 10 PlacesAfterwards, 13 TransitionsBefore, 7 TransitionsAfterwards, 4 CoEnabledTransitionPairs, 3 FixpointIterations, 4 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 10 TotalNumberOfCompositions, 10 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 4, positive: 4, positive conditional: 0, positive unconditional: 4, 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: 4, positive: 4, positive conditional: 0, positive unconditional: 4, 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: 10, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 4, unknown conditional: 0, unknown unconditional: 4] , Statistics on independence cache: Total cache size (in pairs): 2, Positive cache size: 2, Positive conditional cache size: 0, Positive unconditional cache size: 2, 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=2, res=0, 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: 3.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 797.6ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 79.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 502.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 7 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.8ms SsaConstructionTime, 26.7ms SatisfiabilityAnalysisTime, 38.2ms 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...