/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/safe014_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 17:47:08,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 17:47:08,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 17:47:08,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 17:47:08,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 17:47:08,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 17:47:08,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 17:47:08,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 17:47:08,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 17:47:08,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 17:47:08,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 17:47:08,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 17:47:08,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 17:47:08,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 17:47:08,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 17:47:08,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 17:47:08,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 17:47:08,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 17:47:08,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 17:47:08,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 17:47:08,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 17:47:08,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 17:47:08,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 17:47:08,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 17:47:08,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 17:47:08,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 17:47:08,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 17:47:08,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 17:47:08,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 17:47:08,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 17:47:08,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 17:47:08,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 17:47:08,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 17:47:08,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 17:47:08,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 17:47:08,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 17:47:08,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 17:47:08,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 17:47:08,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 17:47:08,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 17:47:08,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 17:47:08,695 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 17:47:08,729 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 17:47:08,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 17:47:08,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 17:47:08,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 17:47:08,731 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 17:47:08,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 17:47:08,731 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 17:47:08,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 17:47:08,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 17:47:08,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 17:47:08,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 17:47:08,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 17:47:08,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 17:47:08,734 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 17:47:08,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 17:47:08,734 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 17:47:08,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 17:47:08,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 17:47:08,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 17:47:08,735 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 17:47:08,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 17:47:08,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 17:47:08,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 17:47:08,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 17:47:08,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 17:47:08,736 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 17:47:08,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 17:47:08,737 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 17:47:08,737 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 17:47:08,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 17:47:09,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 17:47:09,033 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 17:47:09,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 17:47:09,037 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 17:47:09,038 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 17:47:09,038 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_tso.opt.i [2020-10-09 17:47:09,110 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b6cbcf8a/7215c680f9494f89903179f22214b261/FLAG1eb1dd6c8 [2020-10-09 17:47:09,606 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 17:47:09,606 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_tso.opt.i [2020-10-09 17:47:09,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b6cbcf8a/7215c680f9494f89903179f22214b261/FLAG1eb1dd6c8 [2020-10-09 17:47:09,867 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b6cbcf8a/7215c680f9494f89903179f22214b261 [2020-10-09 17:47:09,879 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 17:47:09,881 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 17:47:09,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 17:47:09,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 17:47:09,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 17:47:09,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:47:09" (1/1) ... [2020-10-09 17:47:09,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33c7e57f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:47:09, skipping insertion in model container [2020-10-09 17:47:09,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:47:09" (1/1) ... [2020-10-09 17:47:09,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 17:47:09,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 17:47:10,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:47:10,422 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 17:47:10,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:47:10,535 INFO L208 MainTranslator]: Completed translation [2020-10-09 17:47:10,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:47:10 WrapperNode [2020-10-09 17:47:10,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 17:47:10,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 17:47:10,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 17:47:10,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 17:47:10,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:47:10" (1/1) ... [2020-10-09 17:47:10,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:47:10" (1/1) ... [2020-10-09 17:47:10,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 17:47:10,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 17:47:10,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 17:47:10,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 17:47:10,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:47:10" (1/1) ... [2020-10-09 17:47:10,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:47:10" (1/1) ... [2020-10-09 17:47:10,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:47:10" (1/1) ... [2020-10-09 17:47:10,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:47:10" (1/1) ... [2020-10-09 17:47:10,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:47:10" (1/1) ... [2020-10-09 17:47:10,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:47:10" (1/1) ... [2020-10-09 17:47:10,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:47:10" (1/1) ... [2020-10-09 17:47:10,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 17:47:10,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 17:47:10,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 17:47:10,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 17:47:10,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:47:10" (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 17:47:10,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 17:47:10,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 17:47:10,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 17:47:10,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 17:47:10,677 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 17:47:10,677 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 17:47:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 17:47:10,678 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 17:47:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 17:47:10,678 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 17:47:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 17:47:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 17:47:10,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 17:47:10,680 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 17:47:11,023 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 17:47:11,023 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 17:47:11,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:47:11 BoogieIcfgContainer [2020-10-09 17:47:11,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 17:47:11,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 17:47:11,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 17:47:11,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 17:47:11,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 05:47:09" (1/3) ... [2020-10-09 17:47:11,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ff9975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:47:11, skipping insertion in model container [2020-10-09 17:47:11,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:47:10" (2/3) ... [2020-10-09 17:47:11,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ff9975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:47:11, skipping insertion in model container [2020-10-09 17:47:11,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:47:11" (3/3) ... [2020-10-09 17:47:11,034 INFO L111 eAbstractionObserver]: Analyzing ICFG safe014_tso.opt.i [2020-10-09 17:47:11,047 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 17:47:11,055 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 17:47:11,056 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 17:47:11,084 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,084 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,085 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,085 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,086 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,086 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,086 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,087 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,087 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,087 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,087 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,088 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,088 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,088 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,089 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,089 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,089 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,090 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,093 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,094 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,094 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,094 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,100 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,100 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,103 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,103 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,105 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,106 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,106 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,106 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:47:11,125 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 17:47:11,147 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 17:47:11,147 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 17:47:11,147 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 17:47:11,147 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 17:47:11,148 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 17:47:11,148 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 17:47:11,148 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 17:47:11,148 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 17:47:11,162 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 70 transitions, 155 flow [2020-10-09 17:47:11,216 INFO L129 PetriNetUnfolder]: 2/67 cut-off events. [2020-10-09 17:47:11,216 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:47:11,223 INFO L80 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 67 events. 2/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-10-09 17:47:11,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 70 transitions, 155 flow [2020-10-09 17:47:11,232 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 56 transitions, 121 flow [2020-10-09 17:47:11,251 INFO L129 PetriNetUnfolder]: 1/55 cut-off events. [2020-10-09 17:47:11,251 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:47:11,252 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:47:11,253 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] [2020-10-09 17:47:11,253 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:47:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:47:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash -927851968, now seen corresponding path program 1 times [2020-10-09 17:47:11,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:47:11,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461947397] [2020-10-09 17:47:11,274 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 17:47:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:47:11,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:47:11,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:47:11,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:47:11,520 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 17:47:11,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:47:11,595 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 17:47:11,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461947397] [2020-10-09 17:47:11,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:47:11,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:47:11,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645209934] [2020-10-09 17:47:11,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:47:11,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:47:11,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:47:11,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:47:11,884 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 70 [2020-10-09 17:47:11,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 121 flow. Second operand 8 states. [2020-10-09 17:47:11,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:47:11,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 70 [2020-10-09 17:47:11,888 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:47:11,995 INFO L129 PetriNetUnfolder]: 3/70 cut-off events. [2020-10-09 17:47:11,995 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:47:11,996 INFO L80 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 70 events. 3/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 98 event pairs, 0 based on Foata normal form. 4/73 useless extension candidates. Maximal degree in co-relation 75. Up to 7 conditions per place. [2020-10-09 17:47:11,998 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 6 selfloop transitions, 2 changer transitions 11/65 dead transitions. [2020-10-09 17:47:11,998 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 175 flow [2020-10-09 17:47:11,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:47:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:47:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 562 transitions. [2020-10-09 17:47:12,017 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8920634920634921 [2020-10-09 17:47:12,018 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 562 transitions. [2020-10-09 17:47:12,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 562 transitions. [2020-10-09 17:47:12,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:47:12,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 562 transitions. [2020-10-09 17:47:12,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:47:12,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:47:12,041 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:47:12,045 INFO L185 Difference]: Start difference. First operand has 65 places, 56 transitions, 121 flow. Second operand 9 states and 562 transitions. [2020-10-09 17:47:12,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 175 flow [2020-10-09 17:47:12,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 17:47:12,059 INFO L241 Difference]: Finished difference. Result has 77 places, 54 transitions, 134 flow [2020-10-09 17:47:12,062 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=134, PETRI_PLACES=77, PETRI_TRANSITIONS=54} [2020-10-09 17:47:12,063 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2020-10-09 17:47:12,063 INFO L481 AbstractCegarLoop]: Abstraction has has 77 places, 54 transitions, 134 flow [2020-10-09 17:47:12,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:47:12,063 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:47:12,064 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 17:47:12,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 17:47:12,266 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:47:12,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:47:12,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1873588799, now seen corresponding path program 1 times [2020-10-09 17:47:12,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:47:12,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703367528] [2020-10-09 17:47:12,270 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 17:47:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:47:12,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:47:12,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:47:12,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:47:12,417 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 17:47:12,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:47:12,484 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 17:47:12,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703367528] [2020-10-09 17:47:12,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:47:12,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:47:12,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620916606] [2020-10-09 17:47:12,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:47:12,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:47:12,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:47:12,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:47:12,658 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 70 [2020-10-09 17:47:12,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 54 transitions, 134 flow. Second operand 8 states. [2020-10-09 17:47:12,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:47:12,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 70 [2020-10-09 17:47:12,660 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:47:12,762 INFO L129 PetriNetUnfolder]: 3/69 cut-off events. [2020-10-09 17:47:12,762 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2020-10-09 17:47:12,763 INFO L80 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 69 events. 3/69 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 92 event pairs, 0 based on Foata normal form. 2/71 useless extension candidates. Maximal degree in co-relation 108. Up to 7 conditions per place. [2020-10-09 17:47:12,764 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 6 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2020-10-09 17:47:12,764 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 64 transitions, 208 flow [2020-10-09 17:47:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:47:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:47:12,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 560 transitions. [2020-10-09 17:47:12,770 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2020-10-09 17:47:12,770 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 560 transitions. [2020-10-09 17:47:12,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 560 transitions. [2020-10-09 17:47:12,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:47:12,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 560 transitions. [2020-10-09 17:47:12,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:47:12,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:47:12,775 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:47:12,775 INFO L185 Difference]: Start difference. First operand has 77 places, 54 transitions, 134 flow. Second operand 9 states and 560 transitions. [2020-10-09 17:47:12,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 64 transitions, 208 flow [2020-10-09 17:47:12,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 64 transitions, 176 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 17:47:12,779 INFO L241 Difference]: Finished difference. Result has 77 places, 54 transitions, 138 flow [2020-10-09 17:47:12,779 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=138, PETRI_PLACES=77, PETRI_TRANSITIONS=54} [2020-10-09 17:47:12,780 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2020-10-09 17:47:12,780 INFO L481 AbstractCegarLoop]: Abstraction has has 77 places, 54 transitions, 138 flow [2020-10-09 17:47:12,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:47:12,781 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:47:12,781 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] [2020-10-09 17:47:12,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 17:47:12,992 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:47:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:47:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1974528386, now seen corresponding path program 1 times [2020-10-09 17:47:12,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:47:12,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611142342] [2020-10-09 17:47:12,995 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 17:47:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:47:13,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:47:13,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:47:13,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:47:13,110 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 17:47:13,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:47:13,151 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 17:47:13,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611142342] [2020-10-09 17:47:13,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:47:13,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:47:13,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149051955] [2020-10-09 17:47:13,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:47:13,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:47:13,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:47:13,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:47:13,392 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 70 [2020-10-09 17:47:13,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 54 transitions, 138 flow. Second operand 8 states. [2020-10-09 17:47:13,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:47:13,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 70 [2020-10-09 17:47:13,393 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:47:13,526 INFO L129 PetriNetUnfolder]: 7/76 cut-off events. [2020-10-09 17:47:13,527 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2020-10-09 17:47:13,528 INFO L80 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 76 events. 7/76 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 114 event pairs, 0 based on Foata normal form. 3/79 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2020-10-09 17:47:13,528 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 6 selfloop transitions, 3 changer transitions 17/71 dead transitions. [2020-10-09 17:47:13,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 71 transitions, 256 flow [2020-10-09 17:47:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 17:47:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 17:47:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 796 transitions. [2020-10-09 17:47:13,533 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8747252747252747 [2020-10-09 17:47:13,533 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 796 transitions. [2020-10-09 17:47:13,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 796 transitions. [2020-10-09 17:47:13,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:47:13,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 796 transitions. [2020-10-09 17:47:13,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 17:47:13,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 17:47:13,538 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 17:47:13,538 INFO L185 Difference]: Start difference. First operand has 77 places, 54 transitions, 138 flow. Second operand 13 states and 796 transitions. [2020-10-09 17:47:13,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 71 transitions, 256 flow [2020-10-09 17:47:13,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 71 transitions, 216 flow, removed 18 selfloop flow, removed 8 redundant places. [2020-10-09 17:47:13,542 INFO L241 Difference]: Finished difference. Result has 86 places, 54 transitions, 154 flow [2020-10-09 17:47:13,543 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=154, PETRI_PLACES=86, PETRI_TRANSITIONS=54} [2020-10-09 17:47:13,543 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 21 predicate places. [2020-10-09 17:47:13,543 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 54 transitions, 154 flow [2020-10-09 17:47:13,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:47:13,543 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:47:13,544 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] [2020-10-09 17:47:13,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 17:47:13,755 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:47:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:47:13,756 INFO L82 PathProgramCache]: Analyzing trace with hash 985130787, now seen corresponding path program 1 times [2020-10-09 17:47:13,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:47:13,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028628344] [2020-10-09 17:47:13,758 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 17:47:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:47:13,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:47:13,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:47:13,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:47:13,903 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 17:47:13,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:47:13,955 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 17:47:13,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028628344] [2020-10-09 17:47:13,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:47:13,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:47:13,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138848749] [2020-10-09 17:47:13,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:47:13,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:47:13,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:47:13,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:47:14,155 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2020-10-09 17:47:14,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 54 transitions, 154 flow. Second operand 9 states. [2020-10-09 17:47:14,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:47:14,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2020-10-09 17:47:14,156 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:47:14,272 INFO L129 PetriNetUnfolder]: 4/75 cut-off events. [2020-10-09 17:47:14,272 INFO L130 PetriNetUnfolder]: For 82/94 co-relation queries the response was YES. [2020-10-09 17:47:14,273 INFO L80 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 75 events. 4/75 cut-off events. For 82/94 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 116 event pairs, 0 based on Foata normal form. 2/76 useless extension candidates. Maximal degree in co-relation 140. Up to 7 conditions per place. [2020-10-09 17:47:14,274 INFO L132 encePairwiseOnDemand]: 62/70 looper letters, 6 selfloop transitions, 4 changer transitions 12/66 dead transitions. [2020-10-09 17:47:14,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 66 transitions, 263 flow [2020-10-09 17:47:14,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:47:14,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:47:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 604 transitions. [2020-10-09 17:47:14,285 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8628571428571429 [2020-10-09 17:47:14,285 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 604 transitions. [2020-10-09 17:47:14,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 604 transitions. [2020-10-09 17:47:14,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:47:14,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 604 transitions. [2020-10-09 17:47:14,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:47:14,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:47:14,290 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:47:14,290 INFO L185 Difference]: Start difference. First operand has 86 places, 54 transitions, 154 flow. Second operand 10 states and 604 transitions. [2020-10-09 17:47:14,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 66 transitions, 263 flow [2020-10-09 17:47:14,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 66 transitions, 215 flow, removed 21 selfloop flow, removed 12 redundant places. [2020-10-09 17:47:14,295 INFO L241 Difference]: Finished difference. Result has 82 places, 54 transitions, 160 flow [2020-10-09 17:47:14,296 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=160, PETRI_PLACES=82, PETRI_TRANSITIONS=54} [2020-10-09 17:47:14,296 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 17 predicate places. [2020-10-09 17:47:14,296 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 54 transitions, 160 flow [2020-10-09 17:47:14,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:47:14,296 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:47:14,296 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] [2020-10-09 17:47:14,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 17:47:14,508 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:47:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:47:14,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1202642323, now seen corresponding path program 1 times [2020-10-09 17:47:14,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:47:14,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241292417] [2020-10-09 17:47:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:47:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:47:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:47:14,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:47:14,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:47:14,631 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 17:47:14,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:47:14,686 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 17:47:14,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241292417] [2020-10-09 17:47:14,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:47:14,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2020-10-09 17:47:14,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797303422] [2020-10-09 17:47:14,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:47:14,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:47:14,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:47:14,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:47:14,995 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:47:14,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 54 transitions, 160 flow. Second operand 10 states. [2020-10-09 17:47:14,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:47:14,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:47:14,997 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:47:15,132 INFO L129 PetriNetUnfolder]: 0/91 cut-off events. [2020-10-09 17:47:15,132 INFO L130 PetriNetUnfolder]: For 112/171 co-relation queries the response was YES. [2020-10-09 17:47:15,133 INFO L80 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 91 events. 0/91 cut-off events. For 112/171 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 262 event pairs, 0 based on Foata normal form. 8/99 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2020-10-09 17:47:15,133 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 6 selfloop transitions, 5 changer transitions 11/65 dead transitions. [2020-10-09 17:47:15,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 65 transitions, 269 flow [2020-10-09 17:47:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 17:47:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 17:47:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 765 transitions. [2020-10-09 17:47:15,136 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8406593406593407 [2020-10-09 17:47:15,136 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 765 transitions. [2020-10-09 17:47:15,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 765 transitions. [2020-10-09 17:47:15,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:47:15,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 765 transitions. [2020-10-09 17:47:15,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 17:47:15,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 17:47:15,141 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 17:47:15,142 INFO L185 Difference]: Start difference. First operand has 82 places, 54 transitions, 160 flow. Second operand 13 states and 765 transitions. [2020-10-09 17:47:15,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 65 transitions, 269 flow [2020-10-09 17:47:15,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 65 transitions, 209 flow, removed 23 selfloop flow, removed 11 redundant places. [2020-10-09 17:47:15,145 INFO L241 Difference]: Finished difference. Result has 85 places, 54 transitions, 160 flow [2020-10-09 17:47:15,146 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=160, PETRI_PLACES=85, PETRI_TRANSITIONS=54} [2020-10-09 17:47:15,146 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2020-10-09 17:47:15,146 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 54 transitions, 160 flow [2020-10-09 17:47:15,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:47:15,146 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:47:15,146 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] [2020-10-09 17:47:15,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 17:47:15,364 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:47:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:47:15,365 INFO L82 PathProgramCache]: Analyzing trace with hash 2138962181, now seen corresponding path program 2 times [2020-10-09 17:47:15,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:47:15,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492607992] [2020-10-09 17:47:15,366 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 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-09 17:47:15,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 17:47:15,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 17:47:15,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 17:47:15,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:47:15,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:47:15,453 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 17:47:15,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:47:15,473 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 17:47:15,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492607992] [2020-10-09 17:47:15,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:47:15,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:47:15,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16000376] [2020-10-09 17:47:15,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:47:15,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:47:15,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:47:15,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:47:15,561 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:47:15,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 54 transitions, 160 flow. Second operand 8 states. [2020-10-09 17:47:15,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:47:15,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:47:15,562 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:47:15,743 INFO L129 PetriNetUnfolder]: 64/241 cut-off events. [2020-10-09 17:47:15,743 INFO L130 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2020-10-09 17:47:15,745 INFO L80 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 241 events. 64/241 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1078 event pairs, 0 based on Foata normal form. 8/241 useless extension candidates. Maximal degree in co-relation 412. Up to 36 conditions per place. [2020-10-09 17:47:15,746 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 10 selfloop transitions, 9 changer transitions 29/92 dead transitions. [2020-10-09 17:47:15,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 92 transitions, 332 flow [2020-10-09 17:47:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 17:47:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-09 17:47:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 735 transitions. [2020-10-09 17:47:15,750 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.875 [2020-10-09 17:47:15,750 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 735 transitions. [2020-10-09 17:47:15,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 735 transitions. [2020-10-09 17:47:15,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:47:15,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 735 transitions. [2020-10-09 17:47:15,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-09 17:47:15,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-09 17:47:15,754 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-09 17:47:15,755 INFO L185 Difference]: Start difference. First operand has 85 places, 54 transitions, 160 flow. Second operand 12 states and 735 transitions. [2020-10-09 17:47:15,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 92 transitions, 332 flow [2020-10-09 17:47:15,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 92 transitions, 298 flow, removed 10 selfloop flow, removed 13 redundant places. [2020-10-09 17:47:15,759 INFO L241 Difference]: Finished difference. Result has 84 places, 60 transitions, 224 flow [2020-10-09 17:47:15,759 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=224, PETRI_PLACES=84, PETRI_TRANSITIONS=60} [2020-10-09 17:47:15,759 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 19 predicate places. [2020-10-09 17:47:15,759 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 60 transitions, 224 flow [2020-10-09 17:47:15,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:47:15,760 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:47:15,760 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] [2020-10-09 17:47:15,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 17:47:15,978 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:47:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:47:15,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1691098015, now seen corresponding path program 1 times [2020-10-09 17:47:15,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:47:15,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894003606] [2020-10-09 17:47:15,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-09 17:47:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:47:16,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 17:47:16,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:47:16,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:47:16,061 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 17:47:16,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:47:16,101 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 17:47:16,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894003606] [2020-10-09 17:47:16,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:47:16,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2020-10-09 17:47:16,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075920030] [2020-10-09 17:47:16,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:47:16,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:47:16,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:47:16,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:47:16,178 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:47:16,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 60 transitions, 224 flow. Second operand 10 states. [2020-10-09 17:47:16,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:47:16,179 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:47:16,179 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:47:16,332 INFO L129 PetriNetUnfolder]: 16/100 cut-off events. [2020-10-09 17:47:16,332 INFO L130 PetriNetUnfolder]: For 361/386 co-relation queries the response was YES. [2020-10-09 17:47:16,333 INFO L80 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 100 events. 16/100 cut-off events. For 361/386 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 221 event pairs, 0 based on Foata normal form. 14/113 useless extension candidates. Maximal degree in co-relation 297. Up to 27 conditions per place. [2020-10-09 17:47:16,334 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 4 selfloop transitions, 12 changer transitions 13/73 dead transitions. [2020-10-09 17:47:16,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 73 transitions, 407 flow [2020-10-09 17:47:16,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 17:47:16,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-09 17:47:16,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 658 transitions. [2020-10-09 17:47:16,342 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8545454545454545 [2020-10-09 17:47:16,342 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 658 transitions. [2020-10-09 17:47:16,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 658 transitions. [2020-10-09 17:47:16,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:47:16,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 658 transitions. [2020-10-09 17:47:16,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-09 17:47:16,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-09 17:47:16,346 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-09 17:47:16,347 INFO L185 Difference]: Start difference. First operand has 84 places, 60 transitions, 224 flow. Second operand 11 states and 658 transitions. [2020-10-09 17:47:16,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 73 transitions, 407 flow [2020-10-09 17:47:16,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 73 transitions, 317 flow, removed 39 selfloop flow, removed 8 redundant places. [2020-10-09 17:47:16,352 INFO L241 Difference]: Finished difference. Result has 86 places, 60 transitions, 230 flow [2020-10-09 17:47:16,352 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=230, PETRI_PLACES=86, PETRI_TRANSITIONS=60} [2020-10-09 17:47:16,353 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 21 predicate places. [2020-10-09 17:47:16,353 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 60 transitions, 230 flow [2020-10-09 17:47:16,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:47:16,353 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:47:16,353 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] [2020-10-09 17:47:16,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-09 17:47:16,554 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:47:16,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:47:16,555 INFO L82 PathProgramCache]: Analyzing trace with hash -165480324, now seen corresponding path program 1 times [2020-10-09 17:47:16,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:47:16,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546074137] [2020-10-09 17:47:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-09 17:47:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:47:16,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:47:16,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:47:16,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:47:16,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:47:16,680 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 17:47:16,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:47:16,720 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 17:47:16,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546074137] [2020-10-09 17:47:16,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:47:16,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 9 [2020-10-09 17:47:16,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985360244] [2020-10-09 17:47:16,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:47:16,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:47:16,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:47:16,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:47:16,991 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:47:16,992 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 60 transitions, 230 flow. Second operand 9 states. [2020-10-09 17:47:16,992 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:47:16,992 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:47:16,992 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:47:17,043 INFO L129 PetriNetUnfolder]: 5/69 cut-off events. [2020-10-09 17:47:17,044 INFO L130 PetriNetUnfolder]: For 54/59 co-relation queries the response was YES. [2020-10-09 17:47:17,044 INFO L80 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 69 events. 5/69 cut-off events. For 54/59 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 81 event pairs, 0 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 134. Up to 11 conditions per place. [2020-10-09 17:47:17,044 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 0 selfloop transitions, 0 changer transitions 58/58 dead transitions. [2020-10-09 17:47:17,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 58 transitions, 246 flow [2020-10-09 17:47:17,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 17:47:17,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-09 17:47:17,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 467 transitions. [2020-10-09 17:47:17,046 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8339285714285715 [2020-10-09 17:47:17,046 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 467 transitions. [2020-10-09 17:47:17,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 467 transitions. [2020-10-09 17:47:17,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:47:17,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 467 transitions. [2020-10-09 17:47:17,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-09 17:47:17,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-09 17:47:17,049 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-09 17:47:17,049 INFO L185 Difference]: Start difference. First operand has 86 places, 60 transitions, 230 flow. Second operand 8 states and 467 transitions. [2020-10-09 17:47:17,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 58 transitions, 246 flow [2020-10-09 17:47:17,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 58 transitions, 170 flow, removed 19 selfloop flow, removed 15 redundant places. [2020-10-09 17:47:17,051 INFO L241 Difference]: Finished difference. Result has 72 places, 0 transitions, 0 flow [2020-10-09 17:47:17,051 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=72, PETRI_TRANSITIONS=0} [2020-10-09 17:47:17,051 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 7 predicate places. [2020-10-09 17:47:17,051 INFO L481 AbstractCegarLoop]: Abstraction has has 72 places, 0 transitions, 0 flow [2020-10-09 17:47:17,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:47:17,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-09 17:47:17,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 05:47:17 BasicIcfg [2020-10-09 17:47:17,269 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 17:47:17,272 INFO L168 Benchmark]: Toolchain (without parser) took 7390.34 ms. Allocated memory was 253.2 MB in the beginning and 422.1 MB in the end (delta: 168.8 MB). Free memory was 208.6 MB in the beginning and 308.5 MB in the end (delta: -99.9 MB). Peak memory consumption was 68.9 MB. Max. memory is 14.2 GB. [2020-10-09 17:47:17,272 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 253.2 MB. Free memory is still 229.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:47:17,273 INFO L168 Benchmark]: CACSL2BoogieTranslator took 654.50 ms. Allocated memory was 253.2 MB in the beginning and 320.3 MB in the end (delta: 67.1 MB). Free memory was 208.6 MB in the beginning and 273.8 MB in the end (delta: -65.2 MB). Peak memory consumption was 29.3 MB. Max. memory is 14.2 GB. [2020-10-09 17:47:17,274 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.19 ms. Allocated memory is still 320.3 MB. Free memory was 273.8 MB in the beginning and 271.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:47:17,275 INFO L168 Benchmark]: Boogie Preprocessor took 26.16 ms. Allocated memory is still 320.3 MB. Free memory was 271.3 MB in the beginning and 268.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:47:17,275 INFO L168 Benchmark]: RCFGBuilder took 413.43 ms. Allocated memory is still 320.3 MB. Free memory was 268.8 MB in the beginning and 247.0 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 17:47:17,276 INFO L168 Benchmark]: TraceAbstraction took 6242.08 ms. Allocated memory was 320.3 MB in the beginning and 422.1 MB in the end (delta: 101.7 MB). Free memory was 247.0 MB in the beginning and 308.5 MB in the end (delta: -61.6 MB). Peak memory consumption was 40.2 MB. Max. memory is 14.2 GB. [2020-10-09 17:47:17,282 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 253.2 MB. Free memory is still 229.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 654.50 ms. Allocated memory was 253.2 MB in the beginning and 320.3 MB in the end (delta: 67.1 MB). Free memory was 208.6 MB in the beginning and 273.8 MB in the end (delta: -65.2 MB). Peak memory consumption was 29.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 49.19 ms. Allocated memory is still 320.3 MB. Free memory was 273.8 MB in the beginning and 271.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.16 ms. Allocated memory is still 320.3 MB. Free memory was 271.3 MB in the beginning and 268.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 413.43 ms. Allocated memory is still 320.3 MB. Free memory was 268.8 MB in the beginning and 247.0 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 6242.08 ms. Allocated memory was 320.3 MB in the beginning and 422.1 MB in the end (delta: 101.7 MB). Free memory was 247.0 MB in the beginning and 308.5 MB in the end (delta: -61.6 MB). Peak memory consumption was 40.2 MB. 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, 69 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: 6.1s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 61 SDtfs, 306 SDslu, 582 SDs, 0 SdLazy, 584 SolverSat, 109 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 714 GetRequests, 592 SyntacticMatches, 16 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=230occurred in iteration=7, 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, 0.9s InterpolantComputationTime, 339 NumberOfCodeBlocks, 339 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 662 ConstructedInterpolants, 0 QuantifiedInterpolants, 76484 SizeOfPredicates, 67 NumberOfNonLiveVariables, 874 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 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...