/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=20.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-08 16:34:40,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-08 16:34:40,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-08 16:34:40,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-08 16:34:40,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-08 16:34:40,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-08 16:34:40,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-08 16:34:40,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-08 16:34:40,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-08 16:34:40,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-08 16:34:40,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-08 16:34:40,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-08 16:34:40,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-08 16:34:40,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-08 16:34:40,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-08 16:34:40,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-08 16:34:40,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-08 16:34:40,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-08 16:34:40,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-08 16:34:40,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-08 16:34:40,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-08 16:34:40,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-08 16:34:40,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-08 16:34:40,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-08 16:34:40,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-08 16:34:40,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-08 16:34:40,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-08 16:34:40,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-08 16:34:40,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-08 16:34:40,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-08 16:34:40,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-08 16:34:40,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-08 16:34:40,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-08 16:34:40,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-08 16:34:40,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-08 16:34:40,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-08 16:34:40,965 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-08 16:34:40,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-08 16:34:40,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-08 16:34:40,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-08 16:34:40,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-08 16:34:40,967 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-08 16:34:40,997 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-08 16:34:40,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-08 16:34:40,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-08 16:34:40,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-08 16:34:40,999 INFO L138 SettingsManager]: * Use SBE=true [2020-10-08 16:34:40,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-08 16:34:40,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-08 16:34:40,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-08 16:34:40,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-08 16:34:41,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-08 16:34:41,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-08 16:34:41,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-08 16:34:41,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-08 16:34:41,000 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-08 16:34:41,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-08 16:34:41,001 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-08 16:34:41,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-08 16:34:41,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-08 16:34:41,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-08 16:34:41,002 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-08 16:34:41,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-08 16:34:41,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-08 16:34:41,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-08 16:34:41,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-08 16:34:41,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-08 16:34:41,003 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-08 16:34:41,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-08 16:34:41,003 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-08 16:34:41,003 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-08 16:34:41,003 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-08 16:34:41,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-08 16:34:41,325 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-08 16:34:41,328 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-08 16:34:41,330 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-10-08 16:34:41,330 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-10-08 16:34:41,331 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=20.bpl [2020-10-08 16:34:41,331 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=20.bpl' [2020-10-08 16:34:41,381 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-08 16:34:41,383 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-08 16:34:41,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-08 16:34:41,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-08 16:34:41,384 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-08 16:34:41,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example2_N=20.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:41" (1/1) ... [2020-10-08 16:34:41,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example2_N=20.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:41" (1/1) ... [2020-10-08 16:34:41,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-08 16:34:41,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-08 16:34:41,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-08 16:34:41,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-08 16:34:41,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example2_N=20.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:41" (1/1) ... [2020-10-08 16:34:41,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example2_N=20.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:41" (1/1) ... [2020-10-08 16:34:41,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example2_N=20.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:41" (1/1) ... [2020-10-08 16:34:41,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example2_N=20.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:41" (1/1) ... [2020-10-08 16:34:41,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example2_N=20.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:41" (1/1) ... [2020-10-08 16:34:41,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example2_N=20.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:41" (1/1) ... [2020-10-08 16:34:41,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example2_N=20.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:41" (1/1) ... [2020-10-08 16:34:41,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-08 16:34:41,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-08 16:34:41,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-08 16:34:41,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-08 16:34:41,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example2_N=20.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:41" (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 [2020-10-08 16:34:41,533 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread18 given in one single declaration [2020-10-08 16:34:41,534 INFO L130 BoogieDeclarations]: Found specification of procedure thread18 [2020-10-08 16:34:41,535 INFO L138 BoogieDeclarations]: Found implementation of procedure thread18 [2020-10-08 16:34:41,536 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread17 given in one single declaration [2020-10-08 16:34:41,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread17 [2020-10-08 16:34:41,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread17 [2020-10-08 16:34:41,537 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread19 given in one single declaration [2020-10-08 16:34:41,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread19 [2020-10-08 16:34:41,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thread19 [2020-10-08 16:34:41,537 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2020-10-08 16:34:41,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2020-10-08 16:34:41,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2020-10-08 16:34:41,538 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2020-10-08 16:34:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2020-10-08 16:34:41,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2020-10-08 16:34:41,538 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2020-10-08 16:34:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2020-10-08 16:34:41,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2020-10-08 16:34:41,539 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2020-10-08 16:34:41,539 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2020-10-08 16:34:41,540 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2020-10-08 16:34:41,540 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2020-10-08 16:34:41,540 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2020-10-08 16:34:41,541 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2020-10-08 16:34:41,548 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2020-10-08 16:34:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2020-10-08 16:34:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2020-10-08 16:34:41,551 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread7 given in one single declaration [2020-10-08 16:34:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure thread7 [2020-10-08 16:34:41,552 INFO L138 BoogieDeclarations]: Found implementation of procedure thread7 [2020-10-08 16:34:41,552 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread8 given in one single declaration [2020-10-08 16:34:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure thread8 [2020-10-08 16:34:41,552 INFO L138 BoogieDeclarations]: Found implementation of procedure thread8 [2020-10-08 16:34:41,553 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread9 given in one single declaration [2020-10-08 16:34:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure thread9 [2020-10-08 16:34:41,554 INFO L138 BoogieDeclarations]: Found implementation of procedure thread9 [2020-10-08 16:34:41,554 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread14 given in one single declaration [2020-10-08 16:34:41,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread14 [2020-10-08 16:34:41,555 INFO L138 BoogieDeclarations]: Found implementation of procedure thread14 [2020-10-08 16:34:41,555 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread13 given in one single declaration [2020-10-08 16:34:41,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread13 [2020-10-08 16:34:41,555 INFO L138 BoogieDeclarations]: Found implementation of procedure thread13 [2020-10-08 16:34:41,556 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-10-08 16:34:41,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-08 16:34:41,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-08 16:34:41,557 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread16 given in one single declaration [2020-10-08 16:34:41,557 INFO L130 BoogieDeclarations]: Found specification of procedure thread16 [2020-10-08 16:34:41,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thread16 [2020-10-08 16:34:41,557 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread15 given in one single declaration [2020-10-08 16:34:41,558 INFO L130 BoogieDeclarations]: Found specification of procedure thread15 [2020-10-08 16:34:41,558 INFO L138 BoogieDeclarations]: Found implementation of procedure thread15 [2020-10-08 16:34:41,558 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread10 given in one single declaration [2020-10-08 16:34:41,558 INFO L130 BoogieDeclarations]: Found specification of procedure thread10 [2020-10-08 16:34:41,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread10 [2020-10-08 16:34:41,559 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread20 given in one single declaration [2020-10-08 16:34:41,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread20 [2020-10-08 16:34:41,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread20 [2020-10-08 16:34:41,560 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread12 given in one single declaration [2020-10-08 16:34:41,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread12 [2020-10-08 16:34:41,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread12 [2020-10-08 16:34:41,561 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread11 given in one single declaration [2020-10-08 16:34:41,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread11 [2020-10-08 16:34:41,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread11 [2020-10-08 16:34:41,563 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-08 16:34:41,936 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-08 16:34:41,936 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-08 16:34:41,938 INFO L202 PluginConnector]: Adding new model example2_N=20.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 04:34:41 BoogieIcfgContainer [2020-10-08 16:34:41,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-08 16:34:41,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-08 16:34:41,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-08 16:34:41,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-08 16:34:41,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example2_N=20.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:41" (1/2) ... [2020-10-08 16:34:41,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51675e06 and model type example2_N=20.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 04:34:41, skipping insertion in model container [2020-10-08 16:34:41,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example2_N=20.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 04:34:41" (2/2) ... [2020-10-08 16:34:41,947 INFO L111 eAbstractionObserver]: Analyzing ICFG example2_N=20.bpl [2020-10-08 16:34:41,959 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-08 16:34:41,967 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-08 16:34:41,968 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-08 16:34:42,251 INFO L253 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2020-10-08 16:34:42,275 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-08 16:34:42,276 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-08 16:34:42,276 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-08 16:34:42,276 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-08 16:34:42,276 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-08 16:34:42,276 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-08 16:34:42,277 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-08 16:34:42,277 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-08 16:34:42,300 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 165 places, 124 transitions, 408 flow [2020-10-08 16:34:42,426 INFO L129 PetriNetUnfolder]: 20/104 cut-off events. [2020-10-08 16:34:42,426 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2020-10-08 16:34:42,441 INFO L80 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 104 events. 20/104 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2020-10-08 16:34:42,441 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 124 transitions, 408 flow [2020-10-08 16:34:42,456 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 102 transitions, 324 flow [2020-10-08 16:34:42,499 INFO L129 PetriNetUnfolder]: 20/101 cut-off events. [2020-10-08 16:34:42,499 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2020-10-08 16:34:42,500 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-08 16:34:42,501 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-08 16:34:42,501 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr14INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr13INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr12INUSE_VIOLATION, ULTIMATE.startErr17INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr16INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr15INUSE_VIOLATION, ULTIMATE.startErr4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr19INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr18INUSE_VIOLATION, ULTIMATE.startErr7INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr11INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr10INUSE_VIOLATION]=== [2020-10-08 16:34:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-08 16:34:42,508 INFO L82 PathProgramCache]: Analyzing trace with hash -328909307, now seen corresponding path program 1 times [2020-10-08 16:34:42,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-08 16:34:42,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228347506] [2020-10-08 16:34:42,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-08 16:34:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-08 16:34:42,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-08 16:34:42,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-08 16:34:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-08 16:34:42,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-08 16:34:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-08 16:34:42,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228347506] [2020-10-08 16:34:42,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-08 16:34:42,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2020-10-08 16:34:42,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880550078] [2020-10-08 16:34:42,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-08 16:34:42,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-08 16:34:42,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-08 16:34:42,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-08 16:34:43,218 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 124 [2020-10-08 16:34:43,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 102 transitions, 324 flow. Second operand 3 states. [2020-10-08 16:34:43,221 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-08 16:34:43,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 124 [2020-10-08 16:34:43,223 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-08 16:34:43,256 INFO L129 PetriNetUnfolder]: 20/101 cut-off events. [2020-10-08 16:34:43,256 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2020-10-08 16:34:43,259 INFO L80 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 101 events. 20/101 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 134 event pairs, 0 based on Foata normal form. 1/82 useless extension candidates. Maximal degree in co-relation 160. Up to 2 conditions per place. [2020-10-08 16:34:43,261 INFO L132 encePairwiseOnDemand]: 122/124 looper letters, 0 selfloop transitions, 0 changer transitions 101/101 dead transitions. [2020-10-08 16:34:43,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 101 transitions, 324 flow [2020-10-08 16:34:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-08 16:34:43,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-08 16:34:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2020-10-08 16:34:43,277 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9811827956989247 [2020-10-08 16:34:43,277 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2020-10-08 16:34:43,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2020-10-08 16:34:43,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-08 16:34:43,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2020-10-08 16:34:43,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-08 16:34:43,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-08 16:34:43,294 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-08 16:34:43,296 INFO L185 Difference]: Start difference. First operand has 143 places, 102 transitions, 324 flow. Second operand 3 states and 365 transitions. [2020-10-08 16:34:43,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 101 transitions, 324 flow [2020-10-08 16:34:43,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 101 transitions, 244 flow, removed 0 selfloop flow, removed 40 redundant places. [2020-10-08 16:34:43,306 INFO L241 Difference]: Finished difference. Result has 104 places, 0 transitions, 0 flow [2020-10-08 16:34:43,309 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=104, PETRI_TRANSITIONS=0} [2020-10-08 16:34:43,310 INFO L341 CegarLoopForPetriNet]: 143 programPoint places, -39 predicate places. [2020-10-08 16:34:43,310 INFO L481 AbstractCegarLoop]: Abstraction has has 104 places, 0 transitions, 0 flow [2020-10-08 16:34:43,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-08 16:34:43,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-08 16:34:43,529 INFO L202 PluginConnector]: Adding new model example2_N=20.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.10 04:34:43 BasicIcfg [2020-10-08 16:34:43,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-08 16:34:43,532 INFO L168 Benchmark]: Toolchain (without parser) took 2149.04 ms. Allocated memory is still 249.0 MB. Free memory was 225.4 MB in the beginning and 112.1 MB in the end (delta: 113.3 MB). Peak memory consumption was 113.3 MB. Max. memory is 14.2 GB. [2020-10-08 16:34:43,533 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 249.0 MB. Free memory is still 225.4 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-08 16:34:43,535 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.02 ms. Allocated memory is still 249.0 MB. Free memory is still 222.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-08 16:34:43,537 INFO L168 Benchmark]: Boogie Preprocessor took 33.72 ms. Allocated memory is still 249.0 MB. Free memory was 222.9 MB in the beginning and 220.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-08 16:34:43,539 INFO L168 Benchmark]: RCFGBuilder took 483.06 ms. Allocated memory is still 249.0 MB. Free memory was 220.4 MB in the beginning and 197.7 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 14.2 GB. [2020-10-08 16:34:43,542 INFO L168 Benchmark]: TraceAbstraction took 1589.46 ms. Allocated memory is still 249.0 MB. Free memory was 197.7 MB in the beginning and 112.1 MB in the end (delta: 85.6 MB). Peak memory consumption was 85.6 MB. Max. memory is 14.2 GB. [2020-10-08 16:34:43,547 INFO L336 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 0.22 ms. Allocated memory is still 249.0 MB. Free memory is still 225.4 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 38.02 ms. Allocated memory is still 249.0 MB. Free memory is still 222.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 33.72 ms. Allocated memory is still 249.0 MB. Free memory was 222.9 MB in the beginning and 220.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 483.06 ms. Allocated memory is still 249.0 MB. Free memory was 220.4 MB in the beginning and 197.7 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 14.2 GB. * TraceAbstraction took 1589.46 ms. Allocated memory is still 249.0 MB. Free memory was 197.7 MB in the beginning and 112.1 MB in the end (delta: 85.6 MB). Peak memory consumption was 85.6 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: 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 21 procedures, 105 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 43 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 81 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=324occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 62 NumberOfCodeBlocks, 62 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 22326 SizeOfPredicates, 0 NumberOfNonLiveVariables, 865 ConjunctsInSsa, 2 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...