/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/pthread-wmm/safe037_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 18:13:33,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 18:13:33,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 18:13:33,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 18:13:33,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 18:13:33,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 18:13:33,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 18:13:33,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 18:13:33,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 18:13:33,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 18:13:33,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 18:13:33,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 18:13:33,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 18:13:33,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 18:13:33,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 18:13:33,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 18:13:33,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 18:13:33,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 18:13:33,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 18:13:33,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 18:13:33,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 18:13:33,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 18:13:33,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 18:13:33,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 18:13:33,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 18:13:33,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 18:13:33,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 18:13:33,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 18:13:33,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 18:13:33,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 18:13:33,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 18:13:33,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 18:13:33,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 18:13:33,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 18:13:33,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 18:13:33,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 18:13:33,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 18:13:33,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 18:13:33,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 18:13:33,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 18:13:33,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 18:13:33,518 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 18:13:33,553 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 18:13:33,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 18:13:33,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 18:13:33,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 18:13:33,556 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 18:13:33,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 18:13:33,556 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 18:13:33,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 18:13:33,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 18:13:33,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 18:13:33,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 18:13:33,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 18:13:33,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 18:13:33,558 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 18:13:33,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 18:13:33,559 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 18:13:33,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 18:13:33,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 18:13:33,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 18:13:33,560 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 18:13:33,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 18:13:33,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 18:13:33,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 18:13:33,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 18:13:33,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 18:13:33,561 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 18:13:33,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 18:13:33,561 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 18:13:33,561 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 18:13:33,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 18:13:33,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 18:13:33,883 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 18:13:33,887 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 18:13:33,889 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 18:13:33,890 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 18:13:33,890 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe037_tso.opt.i [2020-10-09 18:13:33,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/227f7c58f/c16135b3e4774a8f9ca3a29647f76283/FLAGf51674268 [2020-10-09 18:13:34,475 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 18:13:34,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe037_tso.opt.i [2020-10-09 18:13:34,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/227f7c58f/c16135b3e4774a8f9ca3a29647f76283/FLAGf51674268 [2020-10-09 18:13:34,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/227f7c58f/c16135b3e4774a8f9ca3a29647f76283 [2020-10-09 18:13:34,787 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 18:13:34,789 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 18:13:34,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 18:13:34,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 18:13:34,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 18:13:34,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:13:34" (1/1) ... [2020-10-09 18:13:34,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aef83f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:34, skipping insertion in model container [2020-10-09 18:13:34,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:13:34" (1/1) ... [2020-10-09 18:13:34,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 18:13:34,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 18:13:35,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:13:35,366 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 18:13:35,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:13:35,532 INFO L208 MainTranslator]: Completed translation [2020-10-09 18:13:35,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:35 WrapperNode [2020-10-09 18:13:35,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 18:13:35,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 18:13:35,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 18:13:35,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 18:13:35,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:35" (1/1) ... [2020-10-09 18:13:35,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:35" (1/1) ... [2020-10-09 18:13:35,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 18:13:35,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 18:13:35,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 18:13:35,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 18:13:35,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:35" (1/1) ... [2020-10-09 18:13:35,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:35" (1/1) ... [2020-10-09 18:13:35,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:35" (1/1) ... [2020-10-09 18:13:35,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:35" (1/1) ... [2020-10-09 18:13:35,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:35" (1/1) ... [2020-10-09 18:13:35,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:35" (1/1) ... [2020-10-09 18:13:35,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:35" (1/1) ... [2020-10-09 18:13:35,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 18:13:35,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 18:13:35,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 18:13:35,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 18:13:35,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:35" (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 18:13:35,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 18:13:35,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 18:13:35,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 18:13:35,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 18:13:35,665 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 18:13:35,665 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 18:13:35,665 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 18:13:35,666 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 18:13:35,666 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 18:13:35,666 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 18:13:35,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 18:13:35,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 18:13:35,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 18:13:35,673 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 18:13:36,041 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 18:13:36,041 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 18:13:36,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:13:36 BoogieIcfgContainer [2020-10-09 18:13:36,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 18:13:36,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 18:13:36,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 18:13:36,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 18:13:36,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 06:13:34" (1/3) ... [2020-10-09 18:13:36,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4fc1a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:13:36, skipping insertion in model container [2020-10-09 18:13:36,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:35" (2/3) ... [2020-10-09 18:13:36,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4fc1a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:13:36, skipping insertion in model container [2020-10-09 18:13:36,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:13:36" (3/3) ... [2020-10-09 18:13:36,051 INFO L111 eAbstractionObserver]: Analyzing ICFG safe037_tso.opt.i [2020-10-09 18:13:36,063 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 18:13:36,071 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 18:13:36,072 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 18:13:36,098 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,099 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,099 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,099 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,100 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,100 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,100 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,101 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,101 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,101 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,101 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,101 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,102 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,102 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,102 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,103 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,103 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,103 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,107 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,107 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,107 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,107 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,113 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,113 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,113 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,114 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,116 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,116 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,116 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,117 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:36,136 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 18:13:36,154 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 18:13:36,154 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 18:13:36,154 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 18:13:36,154 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 18:13:36,154 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 18:13:36,155 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 18:13:36,155 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 18:13:36,155 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 18:13:36,166 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 71 transitions, 157 flow [2020-10-09 18:13:36,208 INFO L129 PetriNetUnfolder]: 2/68 cut-off events. [2020-10-09 18:13:36,209 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:13:36,214 INFO L80 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 68 events. 2/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-10-09 18:13:36,214 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 71 transitions, 157 flow [2020-10-09 18:13:36,220 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 57 transitions, 123 flow [2020-10-09 18:13:36,239 INFO L129 PetriNetUnfolder]: 1/56 cut-off events. [2020-10-09 18:13:36,239 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:13:36,240 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:13:36,241 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] [2020-10-09 18:13:36,241 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:13:36,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:13:36,247 INFO L82 PathProgramCache]: Analyzing trace with hash 147192619, now seen corresponding path program 1 times [2020-10-09 18:13:36,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:13:36,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590017426] [2020-10-09 18:13:36,262 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 18:13:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:13:36,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 18:13:36,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:13:36,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:13:36,489 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 18:13:36,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:13:36,531 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 18:13:36,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590017426] [2020-10-09 18:13:36,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:13:36,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 18:13:36,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676652301] [2020-10-09 18:13:36,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 18:13:36,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:13:36,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 18:13:36,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 18:13:36,659 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 71 [2020-10-09 18:13:36,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 123 flow. Second operand 8 states. [2020-10-09 18:13:36,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:13:36,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 71 [2020-10-09 18:13:36,664 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:13:36,947 INFO L129 PetriNetUnfolder]: 79/241 cut-off events. [2020-10-09 18:13:36,947 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:13:36,950 INFO L80 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 241 events. 79/241 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1042 event pairs, 0 based on Foata normal form. 12/246 useless extension candidates. Maximal degree in co-relation 378. Up to 36 conditions per place. [2020-10-09 18:13:36,952 INFO L132 encePairwiseOnDemand]: 60/71 looper letters, 10 selfloop transitions, 9 changer transitions 36/100 dead transitions. [2020-10-09 18:13:36,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 100 transitions, 319 flow [2020-10-09 18:13:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 18:13:36,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 18:13:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 816 transitions. [2020-10-09 18:13:36,973 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8840736728060672 [2020-10-09 18:13:36,974 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 816 transitions. [2020-10-09 18:13:36,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 816 transitions. [2020-10-09 18:13:36,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:13:36,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 816 transitions. [2020-10-09 18:13:36,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 18:13:36,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 18:13:36,996 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 18:13:36,998 INFO L185 Difference]: Start difference. First operand has 66 places, 57 transitions, 123 flow. Second operand 13 states and 816 transitions. [2020-10-09 18:13:36,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 100 transitions, 319 flow [2020-10-09 18:13:37,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 100 transitions, 316 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 18:13:37,009 INFO L241 Difference]: Finished difference. Result has 84 places, 61 transitions, 214 flow [2020-10-09 18:13:37,012 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=214, PETRI_PLACES=84, PETRI_TRANSITIONS=61} [2020-10-09 18:13:37,014 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 18 predicate places. [2020-10-09 18:13:37,014 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 61 transitions, 214 flow [2020-10-09 18:13:37,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 18:13:37,014 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:13:37,014 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] [2020-10-09 18:13:37,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 18:13:37,235 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:13:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:13:37,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2024250415, now seen corresponding path program 1 times [2020-10-09 18:13:37,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:13:37,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040951083] [2020-10-09 18:13:37,239 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 18:13:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:13:37,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 18:13:37,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:13:37,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:13:37,363 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 18:13:37,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:13:37,404 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 18:13:37,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040951083] [2020-10-09 18:13:37,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:13:37,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2020-10-09 18:13:37,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651088163] [2020-10-09 18:13:37,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 18:13:37,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:13:37,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 18:13:37,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 18:13:37,516 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 71 [2020-10-09 18:13:37,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 61 transitions, 214 flow. Second operand 10 states. [2020-10-09 18:13:37,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:13:37,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 71 [2020-10-09 18:13:37,517 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:13:37,672 INFO L129 PetriNetUnfolder]: 16/101 cut-off events. [2020-10-09 18:13:37,672 INFO L130 PetriNetUnfolder]: For 354/368 co-relation queries the response was YES. [2020-10-09 18:13:37,673 INFO L80 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 101 events. 16/101 cut-off events. For 354/368 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 208 event pairs, 0 based on Foata normal form. 12/112 useless extension candidates. Maximal degree in co-relation 293. Up to 27 conditions per place. [2020-10-09 18:13:37,674 INFO L132 encePairwiseOnDemand]: 62/71 looper letters, 4 selfloop transitions, 12 changer transitions 13/74 dead transitions. [2020-10-09 18:13:37,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 74 transitions, 397 flow [2020-10-09 18:13:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 18:13:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-09 18:13:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 669 transitions. [2020-10-09 18:13:37,677 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8565941101152369 [2020-10-09 18:13:37,677 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 669 transitions. [2020-10-09 18:13:37,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 669 transitions. [2020-10-09 18:13:37,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:13:37,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 669 transitions. [2020-10-09 18:13:37,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-09 18:13:37,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-09 18:13:37,682 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-09 18:13:37,682 INFO L185 Difference]: Start difference. First operand has 84 places, 61 transitions, 214 flow. Second operand 11 states and 669 transitions. [2020-10-09 18:13:37,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 74 transitions, 397 flow [2020-10-09 18:13:37,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 311 flow, removed 38 selfloop flow, removed 7 redundant places. [2020-10-09 18:13:37,689 INFO L241 Difference]: Finished difference. Result has 85 places, 61 transitions, 224 flow [2020-10-09 18:13:37,690 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=224, PETRI_PLACES=85, PETRI_TRANSITIONS=61} [2020-10-09 18:13:37,691 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2020-10-09 18:13:37,691 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 61 transitions, 224 flow [2020-10-09 18:13:37,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 18:13:37,691 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:13:37,692 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] [2020-10-09 18:13:37,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 18:13:37,903 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:13:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:13:37,904 INFO L82 PathProgramCache]: Analyzing trace with hash -728541331, now seen corresponding path program 1 times [2020-10-09 18:13:37,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:13:37,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90222274] [2020-10-09 18:13:37,906 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 18:13:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:13:37,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 18:13:37,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:13:37,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:13:38,023 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 18:13:38,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:13:38,074 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 18:13:38,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90222274] [2020-10-09 18:13:38,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:13:38,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 18:13:38,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695185267] [2020-10-09 18:13:38,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 18:13:38,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:13:38,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 18:13:38,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 18:13:38,322 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 71 [2020-10-09 18:13:38,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 61 transitions, 224 flow. Second operand 9 states. [2020-10-09 18:13:38,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:13:38,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 71 [2020-10-09 18:13:38,324 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:13:38,406 INFO L129 PetriNetUnfolder]: 10/107 cut-off events. [2020-10-09 18:13:38,406 INFO L130 PetriNetUnfolder]: For 108/120 co-relation queries the response was YES. [2020-10-09 18:13:38,407 INFO L80 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 107 events. 10/107 cut-off events. For 108/120 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 253 event pairs, 0 based on Foata normal form. 1/102 useless extension candidates. Maximal degree in co-relation 212. Up to 21 conditions per place. [2020-10-09 18:13:38,408 INFO L132 encePairwiseOnDemand]: 65/71 looper letters, 9 selfloop transitions, 1 changer transitions 5/66 dead transitions. [2020-10-09 18:13:38,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 66 transitions, 264 flow [2020-10-09 18:13:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 18:13:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 18:13:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 429 transitions. [2020-10-09 18:13:38,410 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8631790744466801 [2020-10-09 18:13:38,410 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 429 transitions. [2020-10-09 18:13:38,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 429 transitions. [2020-10-09 18:13:38,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:13:38,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 429 transitions. [2020-10-09 18:13:38,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 18:13:38,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 18:13:38,413 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 18:13:38,413 INFO L185 Difference]: Start difference. First operand has 85 places, 61 transitions, 224 flow. Second operand 7 states and 429 transitions. [2020-10-09 18:13:38,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 66 transitions, 264 flow [2020-10-09 18:13:38,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 66 transitions, 188 flow, removed 19 selfloop flow, removed 15 redundant places. [2020-10-09 18:13:38,417 INFO L241 Difference]: Finished difference. Result has 77 places, 61 transitions, 161 flow [2020-10-09 18:13:38,418 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=161, PETRI_PLACES=77, PETRI_TRANSITIONS=61} [2020-10-09 18:13:38,418 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 11 predicate places. [2020-10-09 18:13:38,418 INFO L481 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 161 flow [2020-10-09 18:13:38,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 18:13:38,418 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:13:38,419 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] [2020-10-09 18:13:38,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 18:13:38,631 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:13:38,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:13:38,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1730029587, now seen corresponding path program 2 times [2020-10-09 18:13:38,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:13:38,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604373381] [2020-10-09 18:13:38,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 18:13:38,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 18:13:38,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:13:38,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 18:13:38,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:13:38,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:13:38,735 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 18:13:38,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:13:38,780 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 18:13:38,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604373381] [2020-10-09 18:13:38,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:13:38,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 18:13:38,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652021408] [2020-10-09 18:13:38,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 18:13:38,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:13:38,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 18:13:38,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 18:13:38,991 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 71 [2020-10-09 18:13:38,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 61 transitions, 161 flow. Second operand 9 states. [2020-10-09 18:13:38,992 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:13:38,992 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 71 [2020-10-09 18:13:38,992 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:13:39,058 INFO L129 PetriNetUnfolder]: 12/125 cut-off events. [2020-10-09 18:13:39,059 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-10-09 18:13:39,060 INFO L80 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 125 events. 12/125 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 348 event pairs, 0 based on Foata normal form. 1/121 useless extension candidates. Maximal degree in co-relation 185. Up to 16 conditions per place. [2020-10-09 18:13:39,060 INFO L132 encePairwiseOnDemand]: 65/71 looper letters, 9 selfloop transitions, 1 changer transitions 5/66 dead transitions. [2020-10-09 18:13:39,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 66 transitions, 207 flow [2020-10-09 18:13:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 18:13:39,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 18:13:39,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 429 transitions. [2020-10-09 18:13:39,062 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8631790744466801 [2020-10-09 18:13:39,062 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 429 transitions. [2020-10-09 18:13:39,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 429 transitions. [2020-10-09 18:13:39,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:13:39,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 429 transitions. [2020-10-09 18:13:39,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 18:13:39,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 18:13:39,065 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 18:13:39,066 INFO L185 Difference]: Start difference. First operand has 77 places, 61 transitions, 161 flow. Second operand 7 states and 429 transitions. [2020-10-09 18:13:39,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 66 transitions, 207 flow [2020-10-09 18:13:39,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 66 transitions, 192 flow, removed 7 selfloop flow, removed 5 redundant places. [2020-10-09 18:13:39,068 INFO L241 Difference]: Finished difference. Result has 79 places, 61 transitions, 165 flow [2020-10-09 18:13:39,069 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2020-10-09 18:13:39,069 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2020-10-09 18:13:39,069 INFO L481 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 165 flow [2020-10-09 18:13:39,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 18:13:39,069 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:13:39,070 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] [2020-10-09 18:13:39,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 18:13:39,286 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:13:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:13:39,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1883727063, now seen corresponding path program 3 times [2020-10-09 18:13:39,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:13:39,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191010651] [2020-10-09 18:13:39,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-09 18:13:39,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-10-09 18:13:39,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:13:39,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 18:13:39,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:13:39,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:13:39,398 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 18:13:39,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:13:39,439 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 18:13:39,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191010651] [2020-10-09 18:13:39,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:13:39,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 18:13:39,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329989736] [2020-10-09 18:13:39,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 18:13:39,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:13:39,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 18:13:39,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 18:13:39,694 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 71 [2020-10-09 18:13:39,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 165 flow. Second operand 9 states. [2020-10-09 18:13:39,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:13:39,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 71 [2020-10-09 18:13:39,695 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:13:39,760 INFO L129 PetriNetUnfolder]: 9/116 cut-off events. [2020-10-09 18:13:39,760 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 18:13:39,761 INFO L80 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 116 events. 9/116 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 354 event pairs, 0 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 177. Up to 14 conditions per place. [2020-10-09 18:13:39,762 INFO L132 encePairwiseOnDemand]: 65/71 looper letters, 0 selfloop transitions, 0 changer transitions 60/60 dead transitions. [2020-10-09 18:13:39,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 60 transitions, 181 flow [2020-10-09 18:13:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 18:13:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 18:13:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 424 transitions. [2020-10-09 18:13:39,765 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8531187122736419 [2020-10-09 18:13:39,765 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 424 transitions. [2020-10-09 18:13:39,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 424 transitions. [2020-10-09 18:13:39,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:13:39,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 424 transitions. [2020-10-09 18:13:39,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 18:13:39,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 18:13:39,768 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 18:13:39,769 INFO L185 Difference]: Start difference. First operand has 79 places, 61 transitions, 165 flow. Second operand 7 states and 424 transitions. [2020-10-09 18:13:39,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 60 transitions, 181 flow [2020-10-09 18:13:39,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 60 transitions, 174 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-09 18:13:39,772 INFO L241 Difference]: Finished difference. Result has 75 places, 0 transitions, 0 flow [2020-10-09 18:13:39,772 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=75, PETRI_TRANSITIONS=0} [2020-10-09 18:13:39,772 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2020-10-09 18:13:39,772 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 0 transitions, 0 flow [2020-10-09 18:13:39,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 18:13:39,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 18:13:39,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 06:13:39 BasicIcfg [2020-10-09 18:13:39,989 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 18:13:39,991 INFO L168 Benchmark]: Toolchain (without parser) took 5201.52 ms. Allocated memory was 254.8 MB in the beginning and 421.5 MB in the end (delta: 166.7 MB). Free memory was 210.2 MB in the beginning and 359.0 MB in the end (delta: -148.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 14.2 GB. [2020-10-09 18:13:39,992 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 254.8 MB. Free memory is still 231.2 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 18:13:39,993 INFO L168 Benchmark]: CACSL2BoogieTranslator took 744.04 ms. Allocated memory was 254.8 MB in the beginning and 322.4 MB in the end (delta: 67.6 MB). Free memory was 210.2 MB in the beginning and 275.4 MB in the end (delta: -65.2 MB). Peak memory consumption was 32.7 MB. Max. memory is 14.2 GB. [2020-10-09 18:13:39,993 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.81 ms. Allocated memory is still 322.4 MB. Free memory is still 275.4 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 18:13:39,994 INFO L168 Benchmark]: Boogie Preprocessor took 25.43 ms. Allocated memory is still 322.4 MB. Free memory was 275.4 MB in the beginning and 272.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 18:13:39,994 INFO L168 Benchmark]: RCFGBuilder took 437.85 ms. Allocated memory is still 322.4 MB. Free memory was 272.9 MB in the beginning and 251.0 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 18:13:39,995 INFO L168 Benchmark]: TraceAbstraction took 3944.42 ms. Allocated memory was 322.4 MB in the beginning and 421.5 MB in the end (delta: 99.1 MB). Free memory was 248.5 MB in the beginning and 359.0 MB in the end (delta: -110.5 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 18:13:39,998 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 254.8 MB. Free memory is still 231.2 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 744.04 ms. Allocated memory was 254.8 MB in the beginning and 322.4 MB in the end (delta: 67.6 MB). Free memory was 210.2 MB in the beginning and 275.4 MB in the end (delta: -65.2 MB). Peak memory consumption was 32.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 44.81 ms. Allocated memory is still 322.4 MB. Free memory is still 275.4 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 25.43 ms. Allocated memory is still 322.4 MB. Free memory was 275.4 MB in the beginning and 272.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 437.85 ms. Allocated memory is still 322.4 MB. Free memory was 272.9 MB in the beginning and 251.0 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 3944.42 ms. Allocated memory was 322.4 MB in the beginning and 421.5 MB in the end (delta: 99.1 MB). Free memory was 248.5 MB in the beginning and 359.0 MB in the end (delta: -110.5 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 70 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: 3.8s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 68 SDtfs, 206 SDslu, 377 SDs, 0 SdLazy, 380 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 475 GetRequests, 402 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=224occurred in iteration=2, 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, 0.5s InterpolantComputationTime, 229 NumberOfCodeBlocks, 229 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 448 ConstructedInterpolants, 0 QuantifiedInterpolants, 48100 SizeOfPredicates, 33 NumberOfNonLiveVariables, 580 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 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...