/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 04:36:01,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 04:36:01,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 04:36:01,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 04:36:01,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 04:36:01,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 04:36:01,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 04:36:01,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 04:36:01,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 04:36:01,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 04:36:01,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 04:36:01,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 04:36:01,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 04:36:01,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 04:36:01,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 04:36:01,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 04:36:01,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 04:36:01,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 04:36:01,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 04:36:01,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 04:36:02,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 04:36:02,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 04:36:02,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 04:36:02,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 04:36:02,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 04:36:02,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 04:36:02,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 04:36:02,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 04:36:02,014 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-NoLbe.epf [2021-03-11 04:36:02,042 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 04:36:02,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 04:36:02,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 04:36:02,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 04:36:02,045 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 04:36:02,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 04:36:02,045 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 04:36:02,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 04:36:02,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 04:36:02,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 04:36:02,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 04:36:02,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 04:36:02,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 04:36:02,046 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 04:36:02,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 04:36:02,046 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 04:36:02,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 04:36:02,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 04:36:02,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 04:36:02,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 04:36:02,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 04:36:02,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 04:36:02,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 04:36:02,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 04:36:02,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 04:36:02,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 04:36:02,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 04:36:02,047 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 04:36:02,047 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 04:36:02,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 04:36:02,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 04:36:02,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 04:36:02,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 04:36:02,288 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 04:36:02,289 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 04:36:02,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Safe.bpl [2021-03-11 04:36:02,290 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Safe.bpl' [2021-03-11 04:36:02,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 04:36:02,563 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 04:36:02,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 04:36:02,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 04:36:02,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 04:36:02,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:02" (1/1) ... [2021-03-11 04:36:02,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:02" (1/1) ... [2021-03-11 04:36:02,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 04:36:02,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 04:36:02,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 04:36:02,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 04:36:02,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:02" (1/1) ... [2021-03-11 04:36:02,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:02" (1/1) ... [2021-03-11 04:36:02,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:02" (1/1) ... [2021-03-11 04:36:02,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:02" (1/1) ... [2021-03-11 04:36:02,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:02" (1/1) ... [2021-03-11 04:36:02,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:02" (1/1) ... [2021-03-11 04:36:02,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:02" (1/1) ... [2021-03-11 04:36:02,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 04:36:02,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 04:36:02,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 04:36:02,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 04:36:02,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:02" (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 04:36:02,650 INFO L130 BoogieDeclarations]: Found specification of procedure decrement [2021-03-11 04:36:02,650 INFO L138 BoogieDeclarations]: Found implementation of procedure decrement [2021-03-11 04:36:02,650 INFO L130 BoogieDeclarations]: Found specification of procedure increment [2021-03-11 04:36:02,650 INFO L138 BoogieDeclarations]: Found implementation of procedure increment [2021-03-11 04:36:02,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 04:36:02,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 04:36:02,651 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 04:36:02,734 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 04:36:02,734 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 04:36:02,735 INFO L202 PluginConnector]: Adding new model ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:36:02 BoogieIcfgContainer [2021-03-11 04:36:02,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 04:36:02,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 04:36:02,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 04:36:02,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 04:36:02,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:02" (1/2) ... [2021-03-11 04:36:02,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7308b569 and model type ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 04:36:02, skipping insertion in model container [2021-03-11 04:36:02,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:36:02" (2/2) ... [2021-03-11 04:36:02,740 INFO L111 eAbstractionObserver]: Analyzing ICFG ThreadIdTest-Safe.bpl [2021-03-11 04:36:02,744 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 04:36:02,747 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 04:36:02,747 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 04:36:02,761 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:02,761 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:02,761 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:02,762 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:02,762 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:02,762 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:02,762 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:02,762 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:02,764 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:02,767 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:02,772 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-11 04:36:02,784 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 04:36:02,798 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:36:02,798 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:36:02,798 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:36:02,799 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:36:02,799 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:36:02,799 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:36:02,799 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:36:02,799 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:36:02,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 14 transitions, 44 flow [2021-03-11 04:36:02,818 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-03-11 04:36:02,818 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 04:36:02,820 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 15 events. 0/15 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 17 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 04:36:02,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 14 transitions, 44 flow [2021-03-11 04:36:02,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 10 transitions, 32 flow [2021-03-11 04:36:02,826 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-11 04:36:02,826 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 04:36:02,826 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:36:02,827 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:36:02,827 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:36:02,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:36:02,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1338516581, now seen corresponding path program 1 times [2021-03-11 04:36:02,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:36:02,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540039683] [2021-03-11 04:36:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:36:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:36:02,957 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:02,958 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:02,988 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:02,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:02,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:02,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:03,007 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-11 04:36:03,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:03,017 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 04:36:03,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540039683] [2021-03-11 04:36:03,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:36:03,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 04:36:03,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538907108] [2021-03-11 04:36:03,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:36:03,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:36:03,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:36:03,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:36:03,033 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 14 [2021-03-11 04:36:03,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 10 transitions, 32 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 04:36:03,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:36:03,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 14 [2021-03-11 04:36:03,053 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:36:03,113 INFO L129 PetriNetUnfolder]: 3/17 cut-off events. [2021-03-11 04:36:03,113 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-03-11 04:36:03,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 17 events. 3/17 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 1/18 useless extension candidates. Maximal degree in co-relation 30. Up to 7 conditions per place. [2021-03-11 04:36:03,115 INFO L132 encePairwiseOnDemand]: 9/14 looper letters, 6 selfloop transitions, 3 changer transitions 1/13 dead transitions. [2021-03-11 04:36:03,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 64 flow [2021-03-11 04:36:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:36:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:36:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 47 transitions. [2021-03-11 04:36:03,122 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2021-03-11 04:36:03,122 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 47 transitions. [2021-03-11 04:36:03,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 47 transitions. [2021-03-11 04:36:03,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:36:03,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 47 transitions. [2021-03-11 04:36:03,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 04:36:03,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 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 04:36:03,128 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 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 04:36:03,129 INFO L185 Difference]: Start difference. First operand has 16 places, 10 transitions, 32 flow. Second operand 6 states and 47 transitions. [2021-03-11 04:36:03,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 64 flow [2021-03-11 04:36:03,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 13 transitions, 52 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-11 04:36:03,133 INFO L241 Difference]: Finished difference. Result has 18 places, 9 transitions, 29 flow [2021-03-11 04:36:03,134 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=29, PETRI_PLACES=18, PETRI_TRANSITIONS=9} [2021-03-11 04:36:03,134 INFO L335 CegarLoopForPetriNet]: 16 programPoint places, 2 predicate places. [2021-03-11 04:36:03,134 INFO L480 AbstractCegarLoop]: Abstraction has has 18 places, 9 transitions, 29 flow [2021-03-11 04:36:03,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 04:36:03,135 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:36:03,135 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:36:03,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 04:36:03,135 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:36:03,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:36:03,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1338455046, now seen corresponding path program 1 times [2021-03-11 04:36:03,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:36:03,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920470609] [2021-03-11 04:36:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:36:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:36:03,150 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:03,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:36:03,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:03,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:36:03,160 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:03,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:36:03,161 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 04:36:03,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920470609] [2021-03-11 04:36:03,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:36:03,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 04:36:03,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373460664] [2021-03-11 04:36:03,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 04:36:03,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:36:03,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 04:36:03,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 04:36:03,169 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 14 [2021-03-11 04:36:03,169 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 9 transitions, 29 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 04:36:03,169 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:36:03,169 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 14 [2021-03-11 04:36:03,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:36:03,173 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-03-11 04:36:03,174 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-11 04:36:03,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 7 events. 0/7 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 1/8 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-11 04:36:03,174 INFO L132 encePairwiseOnDemand]: 12/14 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2021-03-11 04:36:03,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 7 transitions, 24 flow [2021-03-11 04:36:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 04:36:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 04:36:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 38 transitions. [2021-03-11 04:36:03,175 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-03-11 04:36:03,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 38 transitions. [2021-03-11 04:36:03,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 38 transitions. [2021-03-11 04:36:03,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:36:03,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 38 transitions. [2021-03-11 04:36:03,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 04:36:03,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 04:36:03,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 04:36:03,180 INFO L185 Difference]: Start difference. First operand has 18 places, 9 transitions, 29 flow. Second operand 3 states and 38 transitions. [2021-03-11 04:36:03,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 7 transitions, 24 flow [2021-03-11 04:36:03,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 7 transitions, 19 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-11 04:36:03,183 INFO L241 Difference]: Finished difference. Result has 14 places, 0 transitions, 0 flow [2021-03-11 04:36:03,184 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=14, PETRI_TRANSITIONS=0} [2021-03-11 04:36:03,184 INFO L335 CegarLoopForPetriNet]: 16 programPoint places, -2 predicate places. [2021-03-11 04:36:03,184 INFO L480 AbstractCegarLoop]: Abstraction has has 14 places, 0 transitions, 0 flow [2021-03-11 04:36:03,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 04:36:03,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 04:36:03,188 INFO L202 PluginConnector]: Adding new model ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 04:36:03 BasicIcfg [2021-03-11 04:36:03,188 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 04:36:03,189 INFO L168 Benchmark]: Toolchain (without parser) took 628.99 ms. Allocated memory is still 350.2 MB. Free memory was 330.0 MB in the beginning and 303.3 MB in the end (delta: 26.8 MB). Peak memory consumption was 29.5 MB. Max. memory is 16.0 GB. [2021-03-11 04:36:03,189 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 350.2 MB. Free memory was 331.0 MB in the beginning and 331.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 04:36:03,190 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.28 ms. Allocated memory is still 350.2 MB. Free memory was 329.5 MB in the beginning and 328.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 04:36:03,190 INFO L168 Benchmark]: Boogie Preprocessor took 11.11 ms. Allocated memory is still 350.2 MB. Free memory was 328.1 MB in the beginning and 327.2 MB in the end (delta: 835.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 04:36:03,190 INFO L168 Benchmark]: RCFGBuilder took 138.71 ms. Allocated memory is still 350.2 MB. Free memory was 327.1 MB in the beginning and 318.7 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-11 04:36:03,191 INFO L168 Benchmark]: TraceAbstraction took 451.46 ms. Allocated memory is still 350.2 MB. Free memory was 318.2 MB in the beginning and 303.3 MB in the end (delta: 15.0 MB). Peak memory consumption was 16.9 MB. Max. memory is 16.0 GB. [2021-03-11 04:36:03,193 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 350.2 MB. Free memory was 331.0 MB in the beginning and 331.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.28 ms. Allocated memory is still 350.2 MB. Free memory was 329.5 MB in the beginning and 328.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.11 ms. Allocated memory is still 350.2 MB. Free memory was 328.1 MB in the beginning and 327.2 MB in the end (delta: 835.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 138.71 ms. Allocated memory is still 350.2 MB. Free memory was 327.1 MB in the beginning and 318.7 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 451.46 ms. Allocated memory is still 350.2 MB. Free memory was 318.2 MB in the beginning and 303.3 MB in the end (delta: 15.0 MB). Peak memory consumption was 16.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 22]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 389.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 122.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5 SDtfs, 16 SDslu, 5 SDs, 0 SdLazy, 14 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.4ms SsaConstructionTime, 20.9ms SatisfiabilityAnalysisTime, 133.6ms InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 54 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...