/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/safe002_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 17:39:35,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 17:39:35,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 17:39:35,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 17:39:35,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 17:39:35,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 17:39:35,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 17:39:35,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 17:39:35,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 17:39:35,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 17:39:35,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 17:39:35,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 17:39:35,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 17:39:35,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 17:39:35,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 17:39:35,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 17:39:35,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 17:39:35,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 17:39:35,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 17:39:35,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 17:39:35,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 17:39:35,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 17:39:35,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 17:39:35,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 17:39:35,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 17:39:35,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 17:39:35,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 17:39:35,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 17:39:35,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 17:39:35,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 17:39:35,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 17:39:35,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 17:39:35,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 17:39:35,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 17:39:35,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 17:39:35,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 17:39:35,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 17:39:35,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 17:39:35,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 17:39:35,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 17:39:35,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 17:39:35,448 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 17:39:35,473 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 17:39:35,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 17:39:35,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 17:39:35,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 17:39:35,475 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 17:39:35,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 17:39:35,475 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 17:39:35,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 17:39:35,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 17:39:35,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 17:39:35,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 17:39:35,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 17:39:35,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 17:39:35,477 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 17:39:35,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 17:39:35,477 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 17:39:35,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 17:39:35,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 17:39:35,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 17:39:35,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 17:39:35,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 17:39:35,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 17:39:35,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 17:39:35,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 17:39:35,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 17:39:35,479 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 17:39:35,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 17:39:35,479 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 17:39:35,480 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 17:39:35,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 17:39:35,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 17:39:35,784 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 17:39:35,787 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 17:39:35,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 17:39:35,789 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 17:39:35,790 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.opt.i [2020-10-09 17:39:35,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9aa481d3/ec28a24de8ba471085e85a5bb63e5e94/FLAG79042871d [2020-10-09 17:39:36,370 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 17:39:36,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_tso.opt.i [2020-10-09 17:39:36,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9aa481d3/ec28a24de8ba471085e85a5bb63e5e94/FLAG79042871d [2020-10-09 17:39:36,716 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9aa481d3/ec28a24de8ba471085e85a5bb63e5e94 [2020-10-09 17:39:36,723 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 17:39:36,725 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 17:39:36,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 17:39:36,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 17:39:36,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 17:39:36,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:39:36" (1/1) ... [2020-10-09 17:39:36,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416d0f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:39:36, skipping insertion in model container [2020-10-09 17:39:36,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:39:36" (1/1) ... [2020-10-09 17:39:36,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 17:39:36,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 17:39:37,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:39:37,385 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 17:39:37,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:39:37,514 INFO L208 MainTranslator]: Completed translation [2020-10-09 17:39:37,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:39:37 WrapperNode [2020-10-09 17:39:37,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 17:39:37,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 17:39:37,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 17:39:37,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 17:39:37,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:39:37" (1/1) ... [2020-10-09 17:39:37,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:39:37" (1/1) ... [2020-10-09 17:39:37,559 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 17:39:37,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 17:39:37,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 17:39:37,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 17:39:37,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:39:37" (1/1) ... [2020-10-09 17:39:37,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:39:37" (1/1) ... [2020-10-09 17:39:37,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:39:37" (1/1) ... [2020-10-09 17:39:37,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:39:37" (1/1) ... [2020-10-09 17:39:37,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:39:37" (1/1) ... [2020-10-09 17:39:37,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:39:37" (1/1) ... [2020-10-09 17:39:37,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:39:37" (1/1) ... [2020-10-09 17:39:37,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 17:39:37,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 17:39:37,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 17:39:37,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 17:39:37,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:39:37" (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 17:39:37,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 17:39:37,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 17:39:37,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 17:39:37,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 17:39:37,647 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 17:39:37,648 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 17:39:37,648 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 17:39:37,649 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 17:39:37,649 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 17:39:37,650 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 17:39:37,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 17:39:37,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 17:39:37,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 17:39:37,652 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 17:39:38,028 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 17:39:38,028 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 17:39:38,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:39:38 BoogieIcfgContainer [2020-10-09 17:39:38,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 17:39:38,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 17:39:38,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 17:39:38,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 17:39:38,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 05:39:36" (1/3) ... [2020-10-09 17:39:38,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242e7e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:39:38, skipping insertion in model container [2020-10-09 17:39:38,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:39:37" (2/3) ... [2020-10-09 17:39:38,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242e7e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:39:38, skipping insertion in model container [2020-10-09 17:39:38,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:39:38" (3/3) ... [2020-10-09 17:39:38,038 INFO L111 eAbstractionObserver]: Analyzing ICFG safe002_tso.opt.i [2020-10-09 17:39:38,047 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 17:39:38,054 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 17:39:38,055 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 17:39:38,079 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,079 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,079 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,080 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,080 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,081 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,081 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,081 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,081 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,082 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,082 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,082 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,083 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,083 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,083 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,083 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,084 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,084 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,087 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,087 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,088 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,088 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,099 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,099 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,099 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,099 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,105 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,105 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,106 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,106 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:39:38,128 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 17:39:38,145 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 17:39:38,146 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 17:39:38,146 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 17:39:38,146 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 17:39:38,146 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 17:39:38,146 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 17:39:38,146 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 17:39:38,146 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 17:39:38,159 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 70 transitions, 155 flow [2020-10-09 17:39:38,201 INFO L129 PetriNetUnfolder]: 2/67 cut-off events. [2020-10-09 17:39:38,201 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:39:38,206 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 17:39:38,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 70 transitions, 155 flow [2020-10-09 17:39:38,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 56 transitions, 121 flow [2020-10-09 17:39:38,231 INFO L129 PetriNetUnfolder]: 1/55 cut-off events. [2020-10-09 17:39:38,231 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:39:38,231 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:39:38,232 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 17:39:38,233 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:39:38,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:39:38,239 INFO L82 PathProgramCache]: Analyzing trace with hash -927851968, now seen corresponding path program 1 times [2020-10-09 17:39:38,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:39:38,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958901996] [2020-10-09 17:39:38,251 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 17:39:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:39:38,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:39:38,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:39:38,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:39:38,515 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 17:39:38,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:39:38,583 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 17:39:38,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958901996] [2020-10-09 17:39:38,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:39:38,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:39:38,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725659160] [2020-10-09 17:39:38,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:39:38,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:39:38,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:39:38,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:39:38,858 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 70 [2020-10-09 17:39:38,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 121 flow. Second operand 8 states. [2020-10-09 17:39:38,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:39:38,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 70 [2020-10-09 17:39:38,863 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:39:38,963 INFO L129 PetriNetUnfolder]: 3/70 cut-off events. [2020-10-09 17:39:38,963 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:39:38,964 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 95 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 17:39:38,965 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 6 selfloop transitions, 2 changer transitions 11/65 dead transitions. [2020-10-09 17:39:38,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 175 flow [2020-10-09 17:39:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:39:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:39:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 562 transitions. [2020-10-09 17:39:38,985 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8920634920634921 [2020-10-09 17:39:38,986 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 562 transitions. [2020-10-09 17:39:38,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 562 transitions. [2020-10-09 17:39:38,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:39:38,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 562 transitions. [2020-10-09 17:39:38,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:39:39,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:39:39,006 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:39:39,008 INFO L185 Difference]: Start difference. First operand has 65 places, 56 transitions, 121 flow. Second operand 9 states and 562 transitions. [2020-10-09 17:39:39,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 175 flow [2020-10-09 17:39:39,013 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 17:39:39,017 INFO L241 Difference]: Finished difference. Result has 77 places, 54 transitions, 134 flow [2020-10-09 17:39:39,022 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 17:39:39,023 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2020-10-09 17:39:39,023 INFO L481 AbstractCegarLoop]: Abstraction has has 77 places, 54 transitions, 134 flow [2020-10-09 17:39:39,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:39:39,024 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:39:39,028 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 17:39:39,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 17:39:39,249 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:39:39,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:39:39,250 INFO L82 PathProgramCache]: Analyzing trace with hash -6847167, now seen corresponding path program 1 times [2020-10-09 17:39:39,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:39:39,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065956639] [2020-10-09 17:39:39,253 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 17:39:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:39:39,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:39:39,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:39:39,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:39:39,401 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 17:39:39,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:39:39,469 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 17:39:39,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065956639] [2020-10-09 17:39:39,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:39:39,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:39:39,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54815817] [2020-10-09 17:39:39,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:39:39,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:39:39,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:39:39,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:39:39,728 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 70 [2020-10-09 17:39:39,729 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 54 transitions, 134 flow. Second operand 8 states. [2020-10-09 17:39:39,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:39:39,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 70 [2020-10-09 17:39:39,729 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:39:39,873 INFO L129 PetriNetUnfolder]: 18/138 cut-off events. [2020-10-09 17:39:39,873 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2020-10-09 17:39:39,875 INFO L80 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 138 events. 18/138 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 482 event pairs, 0 based on Foata normal form. 5/141 useless extension candidates. Maximal degree in co-relation 230. Up to 15 conditions per place. [2020-10-09 17:39:39,876 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 10 selfloop transitions, 5 changer transitions 23/83 dead transitions. [2020-10-09 17:39:39,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 83 transitions, 308 flow [2020-10-09 17:39:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 17:39:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 17:39:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 808 transitions. [2020-10-09 17:39:39,880 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8879120879120879 [2020-10-09 17:39:39,880 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 808 transitions. [2020-10-09 17:39:39,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 808 transitions. [2020-10-09 17:39:39,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:39:39,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 808 transitions. [2020-10-09 17:39:39,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 17:39:39,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 17:39:39,885 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 17:39:39,885 INFO L185 Difference]: Start difference. First operand has 77 places, 54 transitions, 134 flow. Second operand 13 states and 808 transitions. [2020-10-09 17:39:39,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 83 transitions, 308 flow [2020-10-09 17:39:39,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 256 flow, removed 24 selfloop flow, removed 8 redundant places. [2020-10-09 17:39:39,890 INFO L241 Difference]: Finished difference. Result has 85 places, 56 transitions, 160 flow [2020-10-09 17:39:39,890 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=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=160, PETRI_PLACES=85, PETRI_TRANSITIONS=56} [2020-10-09 17:39:39,891 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2020-10-09 17:39:39,891 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 56 transitions, 160 flow [2020-10-09 17:39:39,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:39:39,891 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:39:39,892 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] [2020-10-09 17:39:40,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 17:39:40,103 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:39:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:39:40,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1344780975, now seen corresponding path program 1 times [2020-10-09 17:39:40,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:39:40,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563607325] [2020-10-09 17:39:40,106 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 17:39:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:39:40,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:39:40,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:39:40,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:39:40,209 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 17:39:40,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:39:40,258 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 17:39:40,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563607325] [2020-10-09 17:39:40,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:39:40,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:39:40,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968983561] [2020-10-09 17:39:40,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:39:40,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:39:40,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:39:40,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:39:40,392 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 70 [2020-10-09 17:39:40,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 56 transitions, 160 flow. Second operand 8 states. [2020-10-09 17:39:40,394 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:39:40,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 70 [2020-10-09 17:39:40,394 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:39:40,528 INFO L129 PetriNetUnfolder]: 6/106 cut-off events. [2020-10-09 17:39:40,529 INFO L130 PetriNetUnfolder]: For 95/99 co-relation queries the response was YES. [2020-10-09 17:39:40,530 INFO L80 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 106 events. 6/106 cut-off events. For 95/99 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 307 event pairs, 0 based on Foata normal form. 4/108 useless extension candidates. Maximal degree in co-relation 200. Up to 12 conditions per place. [2020-10-09 17:39:40,530 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 6 selfloop transitions, 2 changer transitions 10/66 dead transitions. [2020-10-09 17:39:40,530 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 66 transitions, 246 flow [2020-10-09 17:39:40,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:39:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:39:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 560 transitions. [2020-10-09 17:39:40,533 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2020-10-09 17:39:40,533 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 560 transitions. [2020-10-09 17:39:40,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 560 transitions. [2020-10-09 17:39:40,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:39:40,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 560 transitions. [2020-10-09 17:39:40,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:39:40,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:39:40,537 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:39:40,537 INFO L185 Difference]: Start difference. First operand has 85 places, 56 transitions, 160 flow. Second operand 9 states and 560 transitions. [2020-10-09 17:39:40,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 66 transitions, 246 flow [2020-10-09 17:39:40,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 66 transitions, 204 flow, removed 21 selfloop flow, removed 9 redundant places. [2020-10-09 17:39:40,542 INFO L241 Difference]: Finished difference. Result has 82 places, 56 transitions, 162 flow [2020-10-09 17:39:40,542 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=162, PETRI_PLACES=82, PETRI_TRANSITIONS=56} [2020-10-09 17:39:40,542 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 17 predicate places. [2020-10-09 17:39:40,542 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 56 transitions, 162 flow [2020-10-09 17:39:40,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:39:40,543 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:39:40,543 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] [2020-10-09 17:39:40,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 17:39:40,758 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:39:40,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:39:40,759 INFO L82 PathProgramCache]: Analyzing trace with hash -701532048, now seen corresponding path program 1 times [2020-10-09 17:39:40,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:39:40,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963386588] [2020-10-09 17:39:40,760 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 17:39:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:39:40,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:39:40,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:39:40,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:39:40,861 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 17:39:40,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:39:40,909 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 17:39:40,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963386588] [2020-10-09 17:39:40,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:39:40,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:39:40,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95602979] [2020-10-09 17:39:40,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:39:40,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:39:40,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:39:40,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:39:41,097 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:39:41,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 56 transitions, 162 flow. Second operand 9 states. [2020-10-09 17:39:41,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:39:41,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:39:41,098 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:39:41,192 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2020-10-09 17:39:41,193 INFO L130 PetriNetUnfolder]: For 75/112 co-relation queries the response was YES. [2020-10-09 17:39:41,193 INFO L80 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 89 events. 3/89 cut-off events. For 75/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 219 event pairs, 0 based on Foata normal form. 4/92 useless extension candidates. Maximal degree in co-relation 172. Up to 8 conditions per place. [2020-10-09 17:39:41,194 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 7 selfloop transitions, 4 changer transitions 11/65 dead transitions. [2020-10-09 17:39:41,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 65 transitions, 253 flow [2020-10-09 17:39:41,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:39:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:39:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 422 transitions. [2020-10-09 17:39:41,196 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8612244897959184 [2020-10-09 17:39:41,197 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 422 transitions. [2020-10-09 17:39:41,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 422 transitions. [2020-10-09 17:39:41,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:39:41,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 422 transitions. [2020-10-09 17:39:41,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:39:41,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:39:41,200 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:39:41,200 INFO L185 Difference]: Start difference. First operand has 82 places, 56 transitions, 162 flow. Second operand 7 states and 422 transitions. [2020-10-09 17:39:41,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 65 transitions, 253 flow [2020-10-09 17:39:41,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 65 transitions, 229 flow, removed 10 selfloop flow, removed 8 redundant places. [2020-10-09 17:39:41,204 INFO L241 Difference]: Finished difference. Result has 78 places, 54 transitions, 156 flow [2020-10-09 17:39:41,204 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=78, PETRI_TRANSITIONS=54} [2020-10-09 17:39:41,204 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 13 predicate places. [2020-10-09 17:39:41,204 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 54 transitions, 156 flow [2020-10-09 17:39:41,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:39:41,205 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:39:41,205 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 17:39:41,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 17:39:41,426 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:39:41,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:39:41,426 INFO L82 PathProgramCache]: Analyzing trace with hash 473514109, now seen corresponding path program 1 times [2020-10-09 17:39:41,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:39:41,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476195727] [2020-10-09 17:39:41,427 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 17:39:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:39:41,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 17:39:41,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:39:41,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:39:41,512 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 17:39:41,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:39:41,536 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 17:39:41,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476195727] [2020-10-09 17:39:41,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:39:41,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:39:41,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527473341] [2020-10-09 17:39:41,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:39:41,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:39:41,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:39:41,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:39:41,616 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:39:41,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 54 transitions, 156 flow. Second operand 8 states. [2020-10-09 17:39:41,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:39:41,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:39:41,619 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:39:41,813 INFO L129 PetriNetUnfolder]: 64/207 cut-off events. [2020-10-09 17:39:41,813 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2020-10-09 17:39:41,815 INFO L80 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 207 events. 64/207 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 832 event pairs, 0 based on Foata normal form. 8/209 useless extension candidates. Maximal degree in co-relation 371. Up to 36 conditions per place. [2020-10-09 17:39:41,816 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 10 selfloop transitions, 9 changer transitions 29/92 dead transitions. [2020-10-09 17:39:41,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 92 transitions, 328 flow [2020-10-09 17:39:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 17:39:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-09 17:39:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 735 transitions. [2020-10-09 17:39:41,820 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.875 [2020-10-09 17:39:41,820 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 735 transitions. [2020-10-09 17:39:41,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 735 transitions. [2020-10-09 17:39:41,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:39:41,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 735 transitions. [2020-10-09 17:39:41,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-09 17:39:41,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-09 17:39:41,824 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-09 17:39:41,824 INFO L185 Difference]: Start difference. First operand has 78 places, 54 transitions, 156 flow. Second operand 12 states and 735 transitions. [2020-10-09 17:39:41,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 92 transitions, 328 flow [2020-10-09 17:39:41,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 302 flow, removed 5 selfloop flow, removed 10 redundant places. [2020-10-09 17:39:41,829 INFO L241 Difference]: Finished difference. Result has 85 places, 60 transitions, 228 flow [2020-10-09 17:39:41,829 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=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=228, PETRI_PLACES=85, PETRI_TRANSITIONS=60} [2020-10-09 17:39:41,829 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2020-10-09 17:39:41,829 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 60 transitions, 228 flow [2020-10-09 17:39:41,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:39:41,830 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:39:41,830 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 17:39:42,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 17:39:42,042 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:39:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:39:42,042 INFO L82 PathProgramCache]: Analyzing trace with hash -902718007, now seen corresponding path program 1 times [2020-10-09 17:39:42,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:39:42,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158396032] [2020-10-09 17:39:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:39:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:39:42,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:39:42,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:39:42,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:39:42,165 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 17:39:42,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:39:42,219 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 17:39:42,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158396032] [2020-10-09 17:39:42,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:39:42,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:39:42,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144932506] [2020-10-09 17:39:42,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:39:42,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:39:42,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:39:42,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:39:42,426 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:39:42,427 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 60 transitions, 228 flow. Second operand 9 states. [2020-10-09 17:39:42,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:39:42,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:39:42,427 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:39:42,516 INFO L129 PetriNetUnfolder]: 29/194 cut-off events. [2020-10-09 17:39:42,516 INFO L130 PetriNetUnfolder]: For 407/423 co-relation queries the response was YES. [2020-10-09 17:39:42,517 INFO L80 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 194 events. 29/194 cut-off events. For 407/423 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 773 event pairs, 7 based on Foata normal form. 8/196 useless extension candidates. Maximal degree in co-relation 521. Up to 45 conditions per place. [2020-10-09 17:39:42,519 INFO L132 encePairwiseOnDemand]: 62/70 looper letters, 7 selfloop transitions, 4 changer transitions 5/65 dead transitions. [2020-10-09 17:39:42,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 65 transitions, 277 flow [2020-10-09 17:39:42,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:39:42,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:39:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 416 transitions. [2020-10-09 17:39:42,521 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8489795918367347 [2020-10-09 17:39:42,521 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 416 transitions. [2020-10-09 17:39:42,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 416 transitions. [2020-10-09 17:39:42,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:39:42,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 416 transitions. [2020-10-09 17:39:42,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:39:42,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:39:42,524 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:39:42,524 INFO L185 Difference]: Start difference. First operand has 85 places, 60 transitions, 228 flow. Second operand 7 states and 416 transitions. [2020-10-09 17:39:42,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 65 transitions, 277 flow [2020-10-09 17:39:42,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 65 transitions, 247 flow, removed 11 selfloop flow, removed 7 redundant places. [2020-10-09 17:39:42,528 INFO L241 Difference]: Finished difference. Result has 82 places, 60 transitions, 218 flow [2020-10-09 17:39:42,528 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=218, PETRI_PLACES=82, PETRI_TRANSITIONS=60} [2020-10-09 17:39:42,529 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 17 predicate places. [2020-10-09 17:39:42,529 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 60 transitions, 218 flow [2020-10-09 17:39:42,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:39:42,529 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:39:42,529 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 17:39:42,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 17:39:42,739 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:39:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:39:42,740 INFO L82 PathProgramCache]: Analyzing trace with hash 763524851, now seen corresponding path program 2 times [2020-10-09 17:39:42,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:39:42,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620803764] [2020-10-09 17:39:42,740 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 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 17:39:42,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 17:39:42,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 17:39:42,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 17:39:42,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:39:42,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:39:42,852 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 17:39:42,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:39:42,894 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 17:39:42,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620803764] [2020-10-09 17:39:42,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:39:42,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2020-10-09 17:39:42,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22187263] [2020-10-09 17:39:42,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:39:42,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:39:42,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:39:42,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:39:42,965 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:39:42,966 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 60 transitions, 218 flow. Second operand 10 states. [2020-10-09 17:39:42,966 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:39:42,966 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:39:42,967 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:39:43,134 INFO L129 PetriNetUnfolder]: 16/100 cut-off events. [2020-10-09 17:39:43,137 INFO L130 PetriNetUnfolder]: For 148/174 co-relation queries the response was YES. [2020-10-09 17:39:43,138 INFO L80 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 100 events. 16/100 cut-off events. For 148/174 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 229 event pairs, 0 based on Foata normal form. 14/113 useless extension candidates. Maximal degree in co-relation 262. Up to 27 conditions per place. [2020-10-09 17:39:43,139 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 4 selfloop transitions, 12 changer transitions 13/73 dead transitions. [2020-10-09 17:39:43,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 73 transitions, 363 flow [2020-10-09 17:39:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 17:39:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-09 17:39:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 658 transitions. [2020-10-09 17:39:43,144 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8545454545454545 [2020-10-09 17:39:43,144 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 658 transitions. [2020-10-09 17:39:43,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 658 transitions. [2020-10-09 17:39:43,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:39:43,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 658 transitions. [2020-10-09 17:39:43,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-09 17:39:43,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-09 17:39:43,149 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-09 17:39:43,149 INFO L185 Difference]: Start difference. First operand has 82 places, 60 transitions, 218 flow. Second operand 11 states and 658 transitions. [2020-10-09 17:39:43,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 73 transitions, 363 flow [2020-10-09 17:39:43,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 73 transitions, 317 flow, removed 16 selfloop flow, removed 9 redundant places. [2020-10-09 17:39:43,153 INFO L241 Difference]: Finished difference. Result has 86 places, 60 transitions, 230 flow [2020-10-09 17:39:43,153 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 17:39:43,154 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 21 predicate places. [2020-10-09 17:39:43,154 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 60 transitions, 230 flow [2020-10-09 17:39:43,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:39:43,154 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:39:43,154 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 17:39:43,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-09 17:39:43,366 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:39:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:39:43,366 INFO L82 PathProgramCache]: Analyzing trace with hash -861015968, now seen corresponding path program 1 times [2020-10-09 17:39:43,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:39:43,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664906867] [2020-10-09 17:39:43,368 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 17:39:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:39:43,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:39:43,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:39:43,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:39:43,452 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 17:39:43,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:39:43,491 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 17:39:43,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664906867] [2020-10-09 17:39:43,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:39:43,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:39:43,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472849446] [2020-10-09 17:39:43,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:39:43,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:39:43,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:39:43,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:39:43,665 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2020-10-09 17:39:43,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 60 transitions, 230 flow. Second operand 9 states. [2020-10-09 17:39:43,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:39:43,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2020-10-09 17:39:43,666 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:39:43,723 INFO L129 PetriNetUnfolder]: 5/69 cut-off events. [2020-10-09 17:39:43,723 INFO L130 PetriNetUnfolder]: For 58/63 co-relation queries the response was YES. [2020-10-09 17:39:43,724 INFO L80 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 69 events. 5/69 cut-off events. For 58/63 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 133. Up to 11 conditions per place. [2020-10-09 17:39:43,724 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 58/58 dead transitions. [2020-10-09 17:39:43,724 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 58 transitions, 244 flow [2020-10-09 17:39:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:39:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:39:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 416 transitions. [2020-10-09 17:39:43,726 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8489795918367347 [2020-10-09 17:39:43,727 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 416 transitions. [2020-10-09 17:39:43,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 416 transitions. [2020-10-09 17:39:43,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:39:43,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 416 transitions. [2020-10-09 17:39:43,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:39:43,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:39:43,730 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:39:43,730 INFO L185 Difference]: Start difference. First operand has 86 places, 60 transitions, 230 flow. Second operand 7 states and 416 transitions. [2020-10-09 17:39:43,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 58 transitions, 244 flow [2020-10-09 17:39:43,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 58 transitions, 168 flow, removed 19 selfloop flow, removed 15 redundant places. [2020-10-09 17:39:43,733 INFO L241 Difference]: Finished difference. Result has 71 places, 0 transitions, 0 flow [2020-10-09 17:39:43,733 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=7, PETRI_FLOW=0, PETRI_PLACES=71, PETRI_TRANSITIONS=0} [2020-10-09 17:39:43,733 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2020-10-09 17:39:43,734 INFO L481 AbstractCegarLoop]: Abstraction has has 71 places, 0 transitions, 0 flow [2020-10-09 17:39:43,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:39:43,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-09 17:39:43,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 05:39:43 BasicIcfg [2020-10-09 17:39:43,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 17:39:43,956 INFO L168 Benchmark]: Toolchain (without parser) took 7229.69 ms. Allocated memory was 243.8 MB in the beginning and 431.5 MB in the end (delta: 187.7 MB). Free memory was 198.9 MB in the beginning and 179.9 MB in the end (delta: 19.0 MB). Peak memory consumption was 206.7 MB. Max. memory is 14.2 GB. [2020-10-09 17:39:43,956 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 243.8 MB. Free memory is still 220.2 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:39:43,957 INFO L168 Benchmark]: CACSL2BoogieTranslator took 789.06 ms. Allocated memory was 243.8 MB in the beginning and 292.6 MB in the end (delta: 48.8 MB). Free memory was 198.9 MB in the beginning and 246.0 MB in the end (delta: -47.1 MB). Peak memory consumption was 26.8 MB. Max. memory is 14.2 GB. [2020-10-09 17:39:43,958 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.26 ms. Allocated memory is still 292.6 MB. Free memory was 246.0 MB in the beginning and 243.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:39:43,959 INFO L168 Benchmark]: Boogie Preprocessor took 24.39 ms. Allocated memory is still 292.6 MB. Free memory was 243.5 MB in the beginning and 240.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:39:43,959 INFO L168 Benchmark]: RCFGBuilder took 446.28 ms. Allocated memory is still 292.6 MB. Free memory was 240.9 MB in the beginning and 219.1 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 17:39:43,960 INFO L168 Benchmark]: TraceAbstraction took 5921.41 ms. Allocated memory was 292.6 MB in the beginning and 431.5 MB in the end (delta: 138.9 MB). Free memory was 219.1 MB in the beginning and 179.9 MB in the end (delta: 39.2 MB). Peak memory consumption was 178.2 MB. Max. memory is 14.2 GB. [2020-10-09 17:39:43,965 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 243.8 MB. Free memory is still 220.2 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 789.06 ms. Allocated memory was 243.8 MB in the beginning and 292.6 MB in the end (delta: 48.8 MB). Free memory was 198.9 MB in the beginning and 246.0 MB in the end (delta: -47.1 MB). Peak memory consumption was 26.8 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 43.26 ms. Allocated memory is still 292.6 MB. Free memory was 246.0 MB in the beginning and 243.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 24.39 ms. Allocated memory is still 292.6 MB. Free memory was 243.5 MB in the beginning and 240.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 446.28 ms. Allocated memory is still 292.6 MB. Free memory was 240.9 MB in the beginning and 219.1 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 5921.41 ms. Allocated memory was 292.6 MB in the beginning and 431.5 MB in the end (delta: 138.9 MB). Free memory was 219.1 MB in the beginning and 179.9 MB in the end (delta: 39.2 MB). Peak memory consumption was 178.2 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: 5.8s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 48 SDtfs, 311 SDslu, 563 SDs, 0 SdLazy, 544 SolverSat, 101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 706 GetRequests, 591 SyntacticMatches, 17 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s 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, 338 NumberOfCodeBlocks, 338 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 660 ConstructedInterpolants, 0 QuantifiedInterpolants, 71815 SizeOfPredicates, 69 NumberOfNonLiveVariables, 868 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...