/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/ldv-races/race-1_2-join.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 18:27:50,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 18:27:50,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 18:27:50,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 18:27:50,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 18:27:50,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 18:27:50,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 18:27:50,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 18:27:50,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 18:27:50,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 18:27:50,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 18:27:50,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 18:27:50,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 18:27:50,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 18:27:50,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 18:27:50,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 18:27:50,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 18:27:50,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 18:27:50,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 18:27:50,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 18:27:50,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 18:27:50,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 18:27:50,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 18:27:50,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 18:27:50,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-09 18:27:50,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 18:27:50,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 18:27:50,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 18:27:50,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 18:27:50,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 18:27:50,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 18:27:50,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 18:27:50,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 18:27:50,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 18:27:50,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 18:27:50,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 18:27:50,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 18:27:50,659 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 18:27:50,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 18:27:50,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 18:27:50,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 18:27:50,661 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 18:27:50,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 18:27:50,661 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 18:27:50,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 18:27:50,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 18:27:50,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 18:27:50,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 18:27:50,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 18:27:50,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 18:27:50,662 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 18:27:50,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 18:27:50,663 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 18:27:50,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 18:27:50,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 18:27:50,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 18:27:50,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 18:27:50,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 18:27:50,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 18:27:50,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 18:27:50,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 18:27:50,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 18:27:50,665 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 18:27:50,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 18:27:50,665 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 18:27:50,665 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 18:27:50,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 18:27:50,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 18:27:51,001 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 18:27:51,004 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 18:27:51,005 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 18:27:51,008 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 18:27:51,009 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-races/race-1_2-join.i [2020-10-09 18:27:51,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fe7d024d/cf0b8fb0656f4551822dc931d5742df3/FLAG497ff0ecc [2020-10-09 18:27:51,704 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 18:27:51,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-races/race-1_2-join.i [2020-10-09 18:27:51,727 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fe7d024d/cf0b8fb0656f4551822dc931d5742df3/FLAG497ff0ecc [2020-10-09 18:27:51,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fe7d024d/cf0b8fb0656f4551822dc931d5742df3 [2020-10-09 18:27:51,936 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 18:27:51,938 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 18:27:51,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 18:27:51,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 18:27:51,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 18:27:51,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:27:51" (1/1) ... [2020-10-09 18:27:51,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67e464cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:27:51, skipping insertion in model container [2020-10-09 18:27:51,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:27:51" (1/1) ... [2020-10-09 18:27:51,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 18:27:52,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 18:27:52,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:27:52,882 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 18:27:52,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:27:53,359 INFO L208 MainTranslator]: Completed translation [2020-10-09 18:27:53,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:27:53 WrapperNode [2020-10-09 18:27:53,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 18:27:53,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 18:27:53,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 18:27:53,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 18:27:53,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:27:53" (1/1) ... [2020-10-09 18:27:53,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:27:53" (1/1) ... [2020-10-09 18:27:53,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 18:27:53,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 18:27:53,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 18:27:53,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 18:27:53,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:27:53" (1/1) ... [2020-10-09 18:27:53,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:27:53" (1/1) ... [2020-10-09 18:27:53,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:27:53" (1/1) ... [2020-10-09 18:27:53,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:27:53" (1/1) ... [2020-10-09 18:27:53,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:27:53" (1/1) ... [2020-10-09 18:27:53,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:27:53" (1/1) ... [2020-10-09 18:27:53,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:27:53" (1/1) ... [2020-10-09 18:27:53,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 18:27:53,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 18:27:53,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 18:27:53,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 18:27:53,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:27:53" (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 [2020-10-09 18:27:53,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 18:27:53,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-09 18:27:53,536 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-09 18:27:53,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-09 18:27:53,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 18:27:53,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 18:27:53,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 18:27:53,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2020-10-09 18:27:53,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2020-10-09 18:27:53,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 18:27:53,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-09 18:27:53,542 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 18:27:54,047 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 18:27:54,047 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-10-09 18:27:54,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:27:54 BoogieIcfgContainer [2020-10-09 18:27:54,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 18:27:54,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 18:27:54,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 18:27:54,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 18:27:54,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 06:27:51" (1/3) ... [2020-10-09 18:27:54,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c013b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:27:54, skipping insertion in model container [2020-10-09 18:27:54,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:27:53" (2/3) ... [2020-10-09 18:27:54,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c013b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:27:54, skipping insertion in model container [2020-10-09 18:27:54,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:27:54" (3/3) ... [2020-10-09 18:27:54,058 INFO L111 eAbstractionObserver]: Analyzing ICFG race-1_2-join.i [2020-10-09 18:27:54,070 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 18:27:54,078 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-10-09 18:27:54,079 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 18:27:54,105 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:27:54,105 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:27:54,105 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:27:54,106 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:27:54,106 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:27:54,106 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:27:54,107 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:27:54,107 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:27:54,110 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:27:54,111 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:27:54,111 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:27:54,111 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:27:54,111 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:27:54,138 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-09 18:27:54,160 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 18:27:54,161 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 18:27:54,161 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 18:27:54,161 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 18:27:54,161 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 18:27:54,161 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 18:27:54,161 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 18:27:54,161 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 18:27:54,176 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 178 flow [2020-10-09 18:27:54,231 INFO L129 PetriNetUnfolder]: 5/96 cut-off events. [2020-10-09 18:27:54,231 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 18:27:54,235 INFO L80 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 96 events. 5/96 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 136 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 52. Up to 3 conditions per place. [2020-10-09 18:27:54,235 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 85 transitions, 178 flow [2020-10-09 18:27:54,242 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 72 transitions, 150 flow [2020-10-09 18:27:54,250 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2020-10-09 18:27:54,250 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:27:54,251 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:27:54,252 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] [2020-10-09 18:27:54,252 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:27:54,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:27:54,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1989124765, now seen corresponding path program 1 times [2020-10-09 18:27:54,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:27:54,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494784060] [2020-10-09 18:27:54,275 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 [2020-10-09 18:27:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:27:54,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-09 18:27:54,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:27:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:27:54,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:27:54,517 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 18:27:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:27:54,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494784060] [2020-10-09 18:27:54,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:27:54,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-09 18:27:54,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968471525] [2020-10-09 18:27:54,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 18:27:54,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:27:54,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 18:27:54,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-09 18:27:54,829 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 85 [2020-10-09 18:27:54,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 150 flow. Second operand 5 states. [2020-10-09 18:27:54,832 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:27:54,832 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 85 [2020-10-09 18:27:54,833 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:27:54,921 INFO L129 PetriNetUnfolder]: 5/91 cut-off events. [2020-10-09 18:27:54,922 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 18:27:54,923 INFO L80 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 91 events. 5/91 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 138 event pairs, 0 based on Foata normal form. 3/93 useless extension candidates. Maximal degree in co-relation 62. Up to 19 conditions per place. [2020-10-09 18:27:54,924 INFO L132 encePairwiseOnDemand]: 73/85 looper letters, 15 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2020-10-09 18:27:54,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 200 flow [2020-10-09 18:27:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 18:27:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 18:27:54,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 440 transitions. [2020-10-09 18:27:54,944 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7394957983193278 [2020-10-09 18:27:54,945 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 440 transitions. [2020-10-09 18:27:54,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 440 transitions. [2020-10-09 18:27:54,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:27:54,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 440 transitions. [2020-10-09 18:27:54,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 18:27:54,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 18:27:54,964 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 18:27:54,967 INFO L185 Difference]: Start difference. First operand has 74 places, 72 transitions, 150 flow. Second operand 7 states and 440 transitions. [2020-10-09 18:27:54,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 200 flow [2020-10-09 18:27:54,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 72 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 18:27:54,978 INFO L241 Difference]: Finished difference. Result has 77 places, 70 transitions, 170 flow [2020-10-09 18:27:54,981 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=170, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2020-10-09 18:27:54,982 INFO L341 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2020-10-09 18:27:54,983 INFO L481 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 170 flow [2020-10-09 18:27:54,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 18:27:54,983 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:27:54,983 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] [2020-10-09 18:27:55,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 18:27:55,206 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:27:55,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:27:55,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1891934240, now seen corresponding path program 1 times [2020-10-09 18:27:55,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:27:55,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328605133] [2020-10-09 18:27:55,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 18:27:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:27:55,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-09 18:27:55,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:27:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:27:55,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:27:55,371 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 18:27:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:27:55,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328605133] [2020-10-09 18:27:55,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:27:55,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-09 18:27:55,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728307064] [2020-10-09 18:27:55,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 18:27:55,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:27:55,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 18:27:55,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-09 18:27:55,587 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 85 [2020-10-09 18:27:55,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 170 flow. Second operand 5 states. [2020-10-09 18:27:55,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:27:55,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 85 [2020-10-09 18:27:55,589 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:27:55,638 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2020-10-09 18:27:55,638 INFO L130 PetriNetUnfolder]: For 11/14 co-relation queries the response was YES. [2020-10-09 18:27:55,639 INFO L80 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 89 events. 5/89 cut-off events. For 11/14 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 129 event pairs, 4 based on Foata normal form. 1/88 useless extension candidates. Maximal degree in co-relation 26. Up to 27 conditions per place. [2020-10-09 18:27:55,639 INFO L132 encePairwiseOnDemand]: 81/85 looper letters, 18 selfloop transitions, 0 changer transitions 6/68 dead transitions. [2020-10-09 18:27:55,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 68 transitions, 210 flow [2020-10-09 18:27:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 18:27:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-09 18:27:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 316 transitions. [2020-10-09 18:27:55,642 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7435294117647059 [2020-10-09 18:27:55,642 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 316 transitions. [2020-10-09 18:27:55,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 316 transitions. [2020-10-09 18:27:55,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:27:55,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 316 transitions. [2020-10-09 18:27:55,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-09 18:27:55,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-09 18:27:55,646 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-09 18:27:55,646 INFO L185 Difference]: Start difference. First operand has 77 places, 70 transitions, 170 flow. Second operand 5 states and 316 transitions. [2020-10-09 18:27:55,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 68 transitions, 210 flow [2020-10-09 18:27:55,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 68 transitions, 194 flow, removed 0 selfloop flow, removed 5 redundant places. [2020-10-09 18:27:55,649 INFO L241 Difference]: Finished difference. Result has 74 places, 62 transitions, 136 flow [2020-10-09 18:27:55,649 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=74, PETRI_TRANSITIONS=62} [2020-10-09 18:27:55,651 INFO L341 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2020-10-09 18:27:55,651 INFO L481 AbstractCegarLoop]: Abstraction has has 74 places, 62 transitions, 136 flow [2020-10-09 18:27:55,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 18:27:55,651 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:27:55,651 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] [2020-10-09 18:27:55,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 18:27:55,865 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:27:55,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:27:55,866 INFO L82 PathProgramCache]: Analyzing trace with hash -440006597, now seen corresponding path program 1 times [2020-10-09 18:27:55,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:27:55,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162590394] [2020-10-09 18:27:55,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 18:27:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:27:55,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-09 18:27:55,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:27:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:27:55,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:27:55,988 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 18:27:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:27:55,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162590394] [2020-10-09 18:27:55,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:27:55,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-09 18:27:55,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615093940] [2020-10-09 18:27:55,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 18:27:55,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:27:55,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 18:27:55,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-09 18:27:56,185 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 85 [2020-10-09 18:27:56,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 62 transitions, 136 flow. Second operand 5 states. [2020-10-09 18:27:56,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:27:56,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 85 [2020-10-09 18:27:56,186 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:27:56,251 INFO L129 PetriNetUnfolder]: 4/121 cut-off events. [2020-10-09 18:27:56,251 INFO L130 PetriNetUnfolder]: For 6/9 co-relation queries the response was YES. [2020-10-09 18:27:56,252 INFO L80 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 121 events. 4/121 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 282 event pairs, 0 based on Foata normal form. 6/127 useless extension candidates. Maximal degree in co-relation 163. Up to 18 conditions per place. [2020-10-09 18:27:56,253 INFO L132 encePairwiseOnDemand]: 77/85 looper letters, 18 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2020-10-09 18:27:56,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 220 flow [2020-10-09 18:27:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 18:27:56,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-09 18:27:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 502 transitions. [2020-10-09 18:27:56,255 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7382352941176471 [2020-10-09 18:27:56,255 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 502 transitions. [2020-10-09 18:27:56,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 502 transitions. [2020-10-09 18:27:56,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:27:56,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 502 transitions. [2020-10-09 18:27:56,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-09 18:27:56,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-09 18:27:56,259 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-09 18:27:56,259 INFO L185 Difference]: Start difference. First operand has 74 places, 62 transitions, 136 flow. Second operand 8 states and 502 transitions. [2020-10-09 18:27:56,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 220 flow [2020-10-09 18:27:56,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 18:27:56,263 INFO L241 Difference]: Finished difference. Result has 76 places, 70 transitions, 205 flow [2020-10-09 18:27:56,263 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=205, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2020-10-09 18:27:56,264 INFO L341 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2020-10-09 18:27:56,264 INFO L481 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 205 flow [2020-10-09 18:27:56,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 18:27:56,264 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:27:56,264 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] [2020-10-09 18:27:56,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 18:27:56,487 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:27:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:27:56,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1775474631, now seen corresponding path program 1 times [2020-10-09 18:27:56,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:27:56,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163574090] [2020-10-09 18:27:56,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-09 18:27:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 18:27:56,579 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 18:27:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 18:27:56,610 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 18:27:56,647 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 18:27:56,647 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 18:27:56,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 18:27:56,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 06:27:56 BasicIcfg [2020-10-09 18:27:56,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 18:27:56,922 INFO L168 Benchmark]: Toolchain (without parser) took 4983.42 ms. Allocated memory was 251.7 MB in the beginning and 369.1 MB in the end (delta: 117.4 MB). Free memory was 204.9 MB in the beginning and 178.4 MB in the end (delta: 26.5 MB). Peak memory consumption was 143.9 MB. Max. memory is 14.2 GB. [2020-10-09 18:27:56,922 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 18:27:56,924 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1421.40 ms. Allocated memory was 251.7 MB in the beginning and 359.1 MB in the end (delta: 107.5 MB). Free memory was 204.9 MB in the beginning and 322.1 MB in the end (delta: -117.2 MB). Peak memory consumption was 109.9 MB. Max. memory is 14.2 GB. [2020-10-09 18:27:56,925 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.89 ms. Allocated memory is still 359.1 MB. Free memory was 322.1 MB in the beginning and 318.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.2 GB. [2020-10-09 18:27:56,927 INFO L168 Benchmark]: Boogie Preprocessor took 42.76 ms. Allocated memory is still 359.1 MB. Free memory was 318.8 MB in the beginning and 315.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.2 GB. [2020-10-09 18:27:56,932 INFO L168 Benchmark]: RCFGBuilder took 579.08 ms. Allocated memory is still 359.1 MB. Free memory was 315.4 MB in the beginning and 278.7 MB in the end (delta: 36.7 MB). Peak memory consumption was 36.7 MB. Max. memory is 14.2 GB. [2020-10-09 18:27:56,933 INFO L168 Benchmark]: TraceAbstraction took 2868.06 ms. Allocated memory was 359.1 MB in the beginning and 369.1 MB in the end (delta: 10.0 MB). Free memory was 275.3 MB in the beginning and 178.4 MB in the end (delta: 96.9 MB). Peak memory consumption was 106.9 MB. Max. memory is 14.2 GB. [2020-10-09 18:27:56,940 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 1421.40 ms. Allocated memory was 251.7 MB in the beginning and 359.1 MB in the end (delta: 107.5 MB). Free memory was 204.9 MB in the beginning and 322.1 MB in the end (delta: -117.2 MB). Peak memory consumption was 109.9 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 66.89 ms. Allocated memory is still 359.1 MB. Free memory was 322.1 MB in the beginning and 318.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 42.76 ms. Allocated memory is still 359.1 MB. Free memory was 318.8 MB in the beginning and 315.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.2 GB. * RCFGBuilder took 579.08 ms. Allocated memory is still 359.1 MB. Free memory was 315.4 MB in the beginning and 278.7 MB in the end (delta: 36.7 MB). Peak memory consumption was 36.7 MB. Max. memory is 14.2 GB. * TraceAbstraction took 2868.06 ms. Allocated memory was 359.1 MB in the beginning and 369.1 MB in the end (delta: 10.0 MB). Free memory was 275.3 MB in the beginning and 178.4 MB in the end (delta: 96.9 MB). Peak memory consumption was 106.9 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1682]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1683] 0 pthread_t t1; VAL [t1={3:0}] [L1684] 0 pthread_mutex_t mutex; VAL [mutex={2:0}, t1={3:0}] [L1685] 0 int pdev; VAL [mutex={2:0}, pdev=0, t1={3:0}] [L1694] 0 pdev = 1 VAL [mutex={2:0}, pdev=1, t1={3:0}] [L1682] COND FALSE 0 !(!expression) VAL [mutex={2:0}, pdev=1, t1={3:0}] [L1696] COND TRUE 0 __VERIFIER_nondet_int() VAL [mutex={2:0}, pdev=1, t1={3:0}] [L1697] FCALL, FORK 0 pthread_create(&t1, ((void *)0), thread1, ((void *)0)) VAL [arg={0:0}, mutex={2:0}, pdev=1, t1={3:0}] [L1698] 0 pdev = 2 VAL [arg={0:0}, mutex={2:0}, pdev=2, t1={3:0}] [L1688] 1 pdev = 6 VAL [arg={0:0}, arg={0:0}, mutex={2:0}, pdev=6, t1={3:0}] [L1682] COND TRUE 0 !expression VAL [arg={0:0}, arg={0:0}, mutex={2:0}, pdev=6, t1={3:0}] [L1682] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, mutex={2:0}, pdev=6, t1={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 80 locations, 4 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: UNSAFE, OverallTime: 2.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 52 SDtfs, 120 SDslu, 143 SDs, 0 SdLazy, 202 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 155 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=205occurred in iteration=3, 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, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 170 ConstructedInterpolants, 0 QuantifiedInterpolants, 6306 SizeOfPredicates, 9 NumberOfNonLiveVariables, 194 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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...