/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/safe020_pso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 17:49:12,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 17:49:12,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 17:49:12,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 17:49:12,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 17:49:12,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 17:49:12,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 17:49:12,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 17:49:12,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 17:49:12,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 17:49:12,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 17:49:12,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 17:49:12,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 17:49:12,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 17:49:12,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 17:49:12,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 17:49:12,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 17:49:12,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 17:49:12,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 17:49:12,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 17:49:12,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 17:49:12,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 17:49:12,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 17:49:12,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 17:49:12,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 17:49:12,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 17:49:12,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 17:49:12,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 17:49:12,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 17:49:12,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 17:49:12,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 17:49:12,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 17:49:12,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 17:49:12,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 17:49:12,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 17:49:12,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 17:49:12,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 17:49:12,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 17:49:12,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 17:49:12,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 17:49:12,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 17:49:12,236 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 17:49:12,262 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 17:49:12,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 17:49:12,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 17:49:12,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 17:49:12,264 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 17:49:12,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 17:49:12,264 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 17:49:12,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 17:49:12,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 17:49:12,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 17:49:12,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 17:49:12,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 17:49:12,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 17:49:12,265 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 17:49:12,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 17:49:12,266 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 17:49:12,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 17:49:12,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 17:49:12,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 17:49:12,266 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 17:49:12,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 17:49:12,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 17:49:12,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 17:49:12,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 17:49:12,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 17:49:12,268 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 17:49:12,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 17:49:12,268 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 17:49:12,268 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 17:49:12,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 17:49:12,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 17:49:12,601 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 17:49:12,604 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 17:49:12,606 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 17:49:12,606 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 17:49:12,607 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_pso.opt.i [2020-10-09 17:49:12,666 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a88dc64c9/fab678b55bf34c4191072f11065dfe4f/FLAG908775871 [2020-10-09 17:49:13,213 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 17:49:13,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_pso.opt.i [2020-10-09 17:49:13,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a88dc64c9/fab678b55bf34c4191072f11065dfe4f/FLAG908775871 [2020-10-09 17:49:13,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a88dc64c9/fab678b55bf34c4191072f11065dfe4f [2020-10-09 17:49:13,563 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 17:49:13,564 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 17:49:13,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 17:49:13,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 17:49:13,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 17:49:13,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:49:13" (1/1) ... [2020-10-09 17:49:13,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6668818a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:13, skipping insertion in model container [2020-10-09 17:49:13,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:49:13" (1/1) ... [2020-10-09 17:49:13,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 17:49:13,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 17:49:14,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:49:14,087 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 17:49:14,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:49:14,248 INFO L208 MainTranslator]: Completed translation [2020-10-09 17:49:14,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:14 WrapperNode [2020-10-09 17:49:14,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 17:49:14,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 17:49:14,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 17:49:14,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 17:49:14,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:14" (1/1) ... [2020-10-09 17:49:14,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:14" (1/1) ... [2020-10-09 17:49:14,314 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 17:49:14,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 17:49:14,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 17:49:14,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 17:49:14,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:14" (1/1) ... [2020-10-09 17:49:14,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:14" (1/1) ... [2020-10-09 17:49:14,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:14" (1/1) ... [2020-10-09 17:49:14,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:14" (1/1) ... [2020-10-09 17:49:14,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:14" (1/1) ... [2020-10-09 17:49:14,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:14" (1/1) ... [2020-10-09 17:49:14,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:14" (1/1) ... [2020-10-09 17:49:14,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 17:49:14,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 17:49:14,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 17:49:14,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 17:49:14,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:14" (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 17:49:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 17:49:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 17:49:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 17:49:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 17:49:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 17:49:14,417 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 17:49:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 17:49:14,418 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 17:49:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 17:49:14,419 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 17:49:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 17:49:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 17:49:14,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 17:49:14,421 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 17:49:14,769 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 17:49:14,769 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 17:49:14,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:49:14 BoogieIcfgContainer [2020-10-09 17:49:14,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 17:49:14,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 17:49:14,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 17:49:14,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 17:49:14,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 05:49:13" (1/3) ... [2020-10-09 17:49:14,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a9b82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:49:14, skipping insertion in model container [2020-10-09 17:49:14,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:14" (2/3) ... [2020-10-09 17:49:14,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a9b82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:49:14, skipping insertion in model container [2020-10-09 17:49:14,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:49:14" (3/3) ... [2020-10-09 17:49:14,779 INFO L111 eAbstractionObserver]: Analyzing ICFG safe020_pso.opt.i [2020-10-09 17:49:14,789 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 17:49:14,795 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 17:49:14,796 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 17:49:14,831 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,832 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,832 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,832 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,833 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,833 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,834 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,834 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,834 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,835 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,835 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,835 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,836 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,836 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,836 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,836 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,837 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,837 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,842 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,842 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,843 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,843 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,848 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,848 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,849 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,849 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,851 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,852 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,852 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,852 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:14,871 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 17:49:14,891 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 17:49:14,891 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 17:49:14,891 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 17:49:14,891 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 17:49:14,891 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 17:49:14,891 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 17:49:14,892 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 17:49:14,892 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 17:49:14,904 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 76 places, 68 transitions, 151 flow [2020-10-09 17:49:14,947 INFO L129 PetriNetUnfolder]: 2/65 cut-off events. [2020-10-09 17:49:14,947 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:49:14,952 INFO L80 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 65 events. 2/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2020-10-09 17:49:14,953 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 68 transitions, 151 flow [2020-10-09 17:49:14,959 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 54 transitions, 117 flow [2020-10-09 17:49:14,977 INFO L129 PetriNetUnfolder]: 1/53 cut-off events. [2020-10-09 17:49:14,977 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:49:14,977 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:49:14,978 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] [2020-10-09 17:49:14,979 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:49:14,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:49:14,985 INFO L82 PathProgramCache]: Analyzing trace with hash -42514807, now seen corresponding path program 1 times [2020-10-09 17:49:14,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:49:14,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478852829] [2020-10-09 17:49:14,997 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 17:49:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:49:15,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:49:15,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:49:15,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:49:15,242 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 17:49:15,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:49:15,308 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 17:49:15,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478852829] [2020-10-09 17:49:15,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:49:15,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:49:15,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706690669] [2020-10-09 17:49:15,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:49:15,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:49:15,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:49:15,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:49:15,500 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 68 [2020-10-09 17:49:15,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 117 flow. Second operand 8 states. [2020-10-09 17:49:15,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:49:15,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 68 [2020-10-09 17:49:15,504 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:49:15,629 INFO L129 PetriNetUnfolder]: 3/76 cut-off events. [2020-10-09 17:49:15,629 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:49:15,630 INFO L80 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 76 events. 3/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 118 event pairs, 0 based on Foata normal form. 4/79 useless extension candidates. Maximal degree in co-relation 82. Up to 7 conditions per place. [2020-10-09 17:49:15,631 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 6 selfloop transitions, 2 changer transitions 11/63 dead transitions. [2020-10-09 17:49:15,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 171 flow [2020-10-09 17:49:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:49:15,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:49:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 544 transitions. [2020-10-09 17:49:15,650 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2020-10-09 17:49:15,651 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 544 transitions. [2020-10-09 17:49:15,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 544 transitions. [2020-10-09 17:49:15,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:49:15,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 544 transitions. [2020-10-09 17:49:15,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:49:15,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:49:15,677 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:49:15,682 INFO L185 Difference]: Start difference. First operand has 63 places, 54 transitions, 117 flow. Second operand 9 states and 544 transitions. [2020-10-09 17:49:15,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 171 flow [2020-10-09 17:49:15,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 63 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 17:49:15,698 INFO L241 Difference]: Finished difference. Result has 75 places, 52 transitions, 130 flow [2020-10-09 17:49:15,701 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=130, PETRI_PLACES=75, PETRI_TRANSITIONS=52} [2020-10-09 17:49:15,703 INFO L341 CegarLoopForPetriNet]: 63 programPoint places, 12 predicate places. [2020-10-09 17:49:15,703 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 52 transitions, 130 flow [2020-10-09 17:49:15,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:49:15,704 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:49:15,707 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 17:49:15,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 17:49:15,929 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:49:15,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:49:15,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2009774998, now seen corresponding path program 1 times [2020-10-09 17:49:15,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:49:15,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396153644] [2020-10-09 17:49:15,932 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 17:49:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:49:15,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:49:15,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:49:16,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:49:16,050 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 17:49:16,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:49:16,096 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 17:49:16,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396153644] [2020-10-09 17:49:16,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:49:16,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:49:16,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952460657] [2020-10-09 17:49:16,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:49:16,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:49:16,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:49:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:49:16,236 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 68 [2020-10-09 17:49:16,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 52 transitions, 130 flow. Second operand 8 states. [2020-10-09 17:49:16,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:49:16,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 68 [2020-10-09 17:49:16,237 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:49:16,387 INFO L129 PetriNetUnfolder]: 18/133 cut-off events. [2020-10-09 17:49:16,387 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2020-10-09 17:49:16,389 INFO L80 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 133 events. 18/133 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 442 event pairs, 0 based on Foata normal form. 5/136 useless extension candidates. Maximal degree in co-relation 225. Up to 15 conditions per place. [2020-10-09 17:49:16,390 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 10 selfloop transitions, 5 changer transitions 23/81 dead transitions. [2020-10-09 17:49:16,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 304 flow [2020-10-09 17:49:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 17:49:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 17:49:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 782 transitions. [2020-10-09 17:49:16,394 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8846153846153846 [2020-10-09 17:49:16,394 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 782 transitions. [2020-10-09 17:49:16,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 782 transitions. [2020-10-09 17:49:16,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:49:16,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 782 transitions. [2020-10-09 17:49:16,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 17:49:16,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 17:49:16,399 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 17:49:16,399 INFO L185 Difference]: Start difference. First operand has 75 places, 52 transitions, 130 flow. Second operand 13 states and 782 transitions. [2020-10-09 17:49:16,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 304 flow [2020-10-09 17:49:16,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 252 flow, removed 24 selfloop flow, removed 8 redundant places. [2020-10-09 17:49:16,404 INFO L241 Difference]: Finished difference. Result has 83 places, 54 transitions, 156 flow [2020-10-09 17:49:16,404 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=156, PETRI_PLACES=83, PETRI_TRANSITIONS=54} [2020-10-09 17:49:16,405 INFO L341 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2020-10-09 17:49:16,405 INFO L481 AbstractCegarLoop]: Abstraction has has 83 places, 54 transitions, 156 flow [2020-10-09 17:49:16,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:49:16,405 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:49:16,406 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 17:49:16,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 17:49:16,610 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:49:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:49:16,610 INFO L82 PathProgramCache]: Analyzing trace with hash -116766357, now seen corresponding path program 1 times [2020-10-09 17:49:16,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:49:16,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247084782] [2020-10-09 17:49:16,611 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 17:49:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:49:16,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:49:16,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:49:16,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:49:16,721 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 17:49:16,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:49:16,768 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 17:49:16,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247084782] [2020-10-09 17:49:16,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:49:16,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:49:16,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993045834] [2020-10-09 17:49:16,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:49:16,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:49:16,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:49:16,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:49:17,062 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 68 [2020-10-09 17:49:17,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 54 transitions, 156 flow. Second operand 9 states. [2020-10-09 17:49:17,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:49:17,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 68 [2020-10-09 17:49:17,064 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:49:17,178 INFO L129 PetriNetUnfolder]: 8/121 cut-off events. [2020-10-09 17:49:17,178 INFO L130 PetriNetUnfolder]: For 106/128 co-relation queries the response was YES. [2020-10-09 17:49:17,179 INFO L80 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 121 events. 8/121 cut-off events. For 106/128 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 432 event pairs, 0 based on Foata normal form. 4/123 useless extension candidates. Maximal degree in co-relation 234. Up to 12 conditions per place. [2020-10-09 17:49:17,180 INFO L132 encePairwiseOnDemand]: 60/68 looper letters, 6 selfloop transitions, 4 changer transitions 12/66 dead transitions. [2020-10-09 17:49:17,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 66 transitions, 261 flow [2020-10-09 17:49:17,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:49:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:49:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 584 transitions. [2020-10-09 17:49:17,183 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8588235294117647 [2020-10-09 17:49:17,183 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 584 transitions. [2020-10-09 17:49:17,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 584 transitions. [2020-10-09 17:49:17,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:49:17,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 584 transitions. [2020-10-09 17:49:17,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:49:17,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:49:17,187 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:49:17,188 INFO L185 Difference]: Start difference. First operand has 83 places, 54 transitions, 156 flow. Second operand 10 states and 584 transitions. [2020-10-09 17:49:17,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 66 transitions, 261 flow [2020-10-09 17:49:17,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 66 transitions, 219 flow, removed 21 selfloop flow, removed 9 redundant places. [2020-10-09 17:49:17,192 INFO L241 Difference]: Finished difference. Result has 82 places, 54 transitions, 168 flow [2020-10-09 17:49:17,193 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=138, 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=168, PETRI_PLACES=82, PETRI_TRANSITIONS=54} [2020-10-09 17:49:17,193 INFO L341 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2020-10-09 17:49:17,193 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 54 transitions, 168 flow [2020-10-09 17:49:17,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:49:17,194 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:49:17,194 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 17:49:17,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 17:49:17,403 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:49:17,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:49:17,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1572384172, now seen corresponding path program 1 times [2020-10-09 17:49:17,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:49:17,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499634727] [2020-10-09 17:49:17,406 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 17:49:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:49:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 17:49:17,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:49:17,476 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:49:17,500 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 17:49:17,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:49:17,523 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 17:49:17,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499634727] [2020-10-09 17:49:17,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:49:17,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:49:17,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799066576] [2020-10-09 17:49:17,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:49:17,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:49:17,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:49:17,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:49:17,608 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2020-10-09 17:49:17,608 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 54 transitions, 168 flow. Second operand 8 states. [2020-10-09 17:49:17,608 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:49:17,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2020-10-09 17:49:17,609 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:49:17,815 INFO L129 PetriNetUnfolder]: 124/352 cut-off events. [2020-10-09 17:49:17,816 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2020-10-09 17:49:17,819 INFO L80 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 352 events. 124/352 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 1929 event pairs, 0 based on Foata normal form. 14/348 useless extension candidates. Maximal degree in co-relation 646. Up to 72 conditions per place. [2020-10-09 17:49:17,820 INFO L132 encePairwiseOnDemand]: 59/68 looper letters, 10 selfloop transitions, 9 changer transitions 29/92 dead transitions. [2020-10-09 17:49:17,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 92 transitions, 340 flow [2020-10-09 17:49:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 17:49:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-09 17:49:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 711 transitions. [2020-10-09 17:49:17,823 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8713235294117647 [2020-10-09 17:49:17,824 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 711 transitions. [2020-10-09 17:49:17,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 711 transitions. [2020-10-09 17:49:17,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:49:17,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 711 transitions. [2020-10-09 17:49:17,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-09 17:49:17,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-09 17:49:17,828 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-09 17:49:17,828 INFO L185 Difference]: Start difference. First operand has 82 places, 54 transitions, 168 flow. Second operand 12 states and 711 transitions. [2020-10-09 17:49:17,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 92 transitions, 340 flow [2020-10-09 17:49:17,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 309 flow, removed 9 selfloop flow, removed 11 redundant places. [2020-10-09 17:49:17,833 INFO L241 Difference]: Finished difference. Result has 85 places, 60 transitions, 235 flow [2020-10-09 17:49:17,833 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=137, 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=235, PETRI_PLACES=85, PETRI_TRANSITIONS=60} [2020-10-09 17:49:17,834 INFO L341 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2020-10-09 17:49:17,834 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 60 transitions, 235 flow [2020-10-09 17:49:17,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:49:17,834 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:49:17,834 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 17:49:18,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 17:49:18,049 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:49:18,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:49:18,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1143918241, now seen corresponding path program 1 times [2020-10-09 17:49:18,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:49:18,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247027922] [2020-10-09 17:49:18,052 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 17:49:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:49:18,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:49:18,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:49:18,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:49:18,157 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 17:49:18,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:49:18,211 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 17:49:18,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247027922] [2020-10-09 17:49:18,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:49:18,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:49:18,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704022965] [2020-10-09 17:49:18,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:49:18,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:49:18,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:49:18,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:49:18,448 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 68 [2020-10-09 17:49:18,449 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 60 transitions, 235 flow. Second operand 9 states. [2020-10-09 17:49:18,449 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:49:18,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 68 [2020-10-09 17:49:18,449 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:49:18,570 INFO L129 PetriNetUnfolder]: 46/265 cut-off events. [2020-10-09 17:49:18,570 INFO L130 PetriNetUnfolder]: For 663/682 co-relation queries the response was YES. [2020-10-09 17:49:18,572 INFO L80 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 265 events. 46/265 cut-off events. For 663/682 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1311 event pairs, 9 based on Foata normal form. 8/266 useless extension candidates. Maximal degree in co-relation 760. Up to 74 conditions per place. [2020-10-09 17:49:18,573 INFO L132 encePairwiseOnDemand]: 62/68 looper letters, 13 selfloop transitions, 2 changer transitions 5/69 dead transitions. [2020-10-09 17:49:18,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 69 transitions, 295 flow [2020-10-09 17:49:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:49:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:49:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 412 transitions. [2020-10-09 17:49:18,576 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.865546218487395 [2020-10-09 17:49:18,576 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 412 transitions. [2020-10-09 17:49:18,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 412 transitions. [2020-10-09 17:49:18,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:49:18,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 412 transitions. [2020-10-09 17:49:18,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:49:18,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:49:18,579 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:49:18,579 INFO L185 Difference]: Start difference. First operand has 85 places, 60 transitions, 235 flow. Second operand 7 states and 412 transitions. [2020-10-09 17:49:18,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 69 transitions, 295 flow [2020-10-09 17:49:18,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 69 transitions, 265 flow, removed 11 selfloop flow, removed 7 redundant places. [2020-10-09 17:49:18,585 INFO L241 Difference]: Finished difference. Result has 83 places, 60 transitions, 214 flow [2020-10-09 17:49:18,585 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=83, PETRI_TRANSITIONS=60} [2020-10-09 17:49:18,586 INFO L341 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2020-10-09 17:49:18,586 INFO L481 AbstractCegarLoop]: Abstraction has has 83 places, 60 transitions, 214 flow [2020-10-09 17:49:18,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:49:18,586 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:49:18,586 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 17:49:18,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 17:49:18,807 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:49:18,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:49:18,807 INFO L82 PathProgramCache]: Analyzing trace with hash -8488943, now seen corresponding path program 2 times [2020-10-09 17:49:18,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:49:18,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273170432] [2020-10-09 17:49:18,808 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 17:49:18,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 17:49:18,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 17:49:18,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 17:49:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:49:18,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:49:18,898 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 17:49:18,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:49:18,935 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 17:49:18,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273170432] [2020-10-09 17:49:18,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:49:18,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2020-10-09 17:49:18,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196487090] [2020-10-09 17:49:18,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:49:18,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:49:18,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:49:18,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:49:19,088 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2020-10-09 17:49:19,089 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 60 transitions, 214 flow. Second operand 10 states. [2020-10-09 17:49:19,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:49:19,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2020-10-09 17:49:19,090 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:49:19,252 INFO L129 PetriNetUnfolder]: 33/201 cut-off events. [2020-10-09 17:49:19,253 INFO L130 PetriNetUnfolder]: For 304/380 co-relation queries the response was YES. [2020-10-09 17:49:19,254 INFO L80 FinitePrefix]: Finished finitePrefix Result has 580 conditions, 201 events. 33/201 cut-off events. For 304/380 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1031 event pairs, 0 based on Foata normal form. 40/236 useless extension candidates. Maximal degree in co-relation 565. Up to 64 conditions per place. [2020-10-09 17:49:19,254 INFO L132 encePairwiseOnDemand]: 59/68 looper letters, 0 selfloop transitions, 0 changer transitions 65/65 dead transitions. [2020-10-09 17:49:19,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 65 transitions, 309 flow [2020-10-09 17:49:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 17:49:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-09 17:49:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 633 transitions. [2020-10-09 17:49:19,258 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8462566844919787 [2020-10-09 17:49:19,258 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 633 transitions. [2020-10-09 17:49:19,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 633 transitions. [2020-10-09 17:49:19,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:49:19,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 633 transitions. [2020-10-09 17:49:19,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-09 17:49:19,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-09 17:49:19,263 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-09 17:49:19,263 INFO L185 Difference]: Start difference. First operand has 83 places, 60 transitions, 214 flow. Second operand 11 states and 633 transitions. [2020-10-09 17:49:19,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 65 transitions, 309 flow [2020-10-09 17:49:19,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 65 transitions, 290 flow, removed 6 selfloop flow, removed 4 redundant places. [2020-10-09 17:49:19,267 INFO L241 Difference]: Finished difference. Result has 80 places, 0 transitions, 0 flow [2020-10-09 17:49:19,267 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=80, PETRI_TRANSITIONS=0} [2020-10-09 17:49:19,267 INFO L341 CegarLoopForPetriNet]: 63 programPoint places, 17 predicate places. [2020-10-09 17:49:19,271 INFO L481 AbstractCegarLoop]: Abstraction has has 80 places, 0 transitions, 0 flow [2020-10-09 17:49:19,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:49:19,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 17:49:19,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 05:49:19 BasicIcfg [2020-10-09 17:49:19,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 17:49:19,497 INFO L168 Benchmark]: Toolchain (without parser) took 5932.21 ms. Allocated memory was 249.0 MB in the beginning and 427.8 MB in the end (delta: 178.8 MB). Free memory was 203.6 MB in the beginning and 279.6 MB in the end (delta: -76.1 MB). Peak memory consumption was 102.7 MB. Max. memory is 14.2 GB. [2020-10-09 17:49:19,498 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 249.0 MB. Free memory is still 225.4 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:49:19,499 INFO L168 Benchmark]: CACSL2BoogieTranslator took 684.32 ms. Allocated memory was 249.0 MB in the beginning and 307.2 MB in the end (delta: 58.2 MB). Free memory was 203.6 MB in the beginning and 260.3 MB in the end (delta: -56.8 MB). Peak memory consumption was 29.6 MB. Max. memory is 14.2 GB. [2020-10-09 17:49:19,500 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.53 ms. Allocated memory is still 307.2 MB. Free memory was 260.3 MB in the beginning and 257.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:49:19,501 INFO L168 Benchmark]: Boogie Preprocessor took 28.57 ms. Allocated memory is still 307.2 MB. Free memory was 257.8 MB in the beginning and 255.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:49:19,502 INFO L168 Benchmark]: RCFGBuilder took 428.40 ms. Allocated memory is still 307.2 MB. Free memory was 255.3 MB in the beginning and 233.5 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 17:49:19,503 INFO L168 Benchmark]: TraceAbstraction took 4721.79 ms. Allocated memory was 307.2 MB in the beginning and 427.8 MB in the end (delta: 120.6 MB). Free memory was 233.5 MB in the beginning and 279.6 MB in the end (delta: -46.1 MB). Peak memory consumption was 74.4 MB. Max. memory is 14.2 GB. [2020-10-09 17:49:19,507 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 249.0 MB. Free memory is still 225.4 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 684.32 ms. Allocated memory was 249.0 MB in the beginning and 307.2 MB in the end (delta: 58.2 MB). Free memory was 203.6 MB in the beginning and 260.3 MB in the end (delta: -56.8 MB). Peak memory consumption was 29.6 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 63.53 ms. Allocated memory is still 307.2 MB. Free memory was 260.3 MB in the beginning and 257.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.57 ms. Allocated memory is still 307.2 MB. Free memory was 257.8 MB in the beginning and 255.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 428.40 ms. Allocated memory is still 307.2 MB. Free memory was 255.3 MB in the beginning and 233.5 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 4721.79 ms. Allocated memory was 307.2 MB in the beginning and 427.8 MB in the end (delta: 120.6 MB). Free memory was 233.5 MB in the beginning and 279.6 MB in the end (delta: -46.1 MB). Peak memory consumption was 74.4 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, 67 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: 4.5s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 74 SDtfs, 255 SDslu, 475 SDs, 0 SdLazy, 420 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 507 GetRequests, 416 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=235occurred in iteration=4, 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, 0.6s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 468 ConstructedInterpolants, 0 QuantifiedInterpolants, 48220 SizeOfPredicates, 40 NumberOfNonLiveVariables, 624 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 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...