/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/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 14:16:20,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 14:16:20,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 14:16:20,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 14:16:20,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 14:16:20,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 14:16:20,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 14:16:20,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 14:16:20,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 14:16:20,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 14:16:20,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 14:16:20,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 14:16:20,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 14:16:20,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 14:16:20,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 14:16:20,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 14:16:20,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 14:16:20,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 14:16:20,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 14:16:20,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 14:16:20,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 14:16:20,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 14:16:20,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 14:16:20,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 14:16:20,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 14:16:20,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 14:16:20,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 14:16:20,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 14:16:20,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 14:16:20,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 14:16:20,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 14:16:20,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 14:16:20,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 14:16:20,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 14:16:20,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 14:16:20,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 14:16:20,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 14:16:20,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 14:16:20,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 14:16:20,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 14:16:20,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 14:16:20,381 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 14:16:20,418 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 14:16:20,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 14:16:20,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 14:16:20,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 14:16:20,420 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 14:16:20,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 14:16:20,420 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 14:16:20,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 14:16:20,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 14:16:20,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 14:16:20,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 14:16:20,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 14:16:20,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 14:16:20,422 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 14:16:20,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 14:16:20,423 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 14:16:20,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 14:16:20,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 14:16:20,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 14:16:20,424 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 14:16:20,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 14:16:20,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:16:20,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 14:16:20,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 14:16:20,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 14:16:20,425 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 14:16:20,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 14:16:20,425 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 14:16:20,426 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 14:16:20,426 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 14:16:20,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 14:16:20,718 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 14:16:20,721 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 14:16:20,722 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 14:16:20,723 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 14:16:20,724 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2020-10-09 14:16:20,787 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58df2629/e78e433d9ffd48d1bec7b008e3d3dd80/FLAG53c89d24b [2020-10-09 14:16:21,291 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 14:16:21,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2020-10-09 14:16:21,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58df2629/e78e433d9ffd48d1bec7b008e3d3dd80/FLAG53c89d24b [2020-10-09 14:16:21,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58df2629/e78e433d9ffd48d1bec7b008e3d3dd80 [2020-10-09 14:16:21,555 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 14:16:21,556 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 14:16:21,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 14:16:21,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 14:16:21,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 14:16:21,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:16:21" (1/1) ... [2020-10-09 14:16:21,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c1b2e54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:21, skipping insertion in model container [2020-10-09 14:16:21,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:16:21" (1/1) ... [2020-10-09 14:16:21,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 14:16:21,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 14:16:22,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:16:22,111 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 14:16:22,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:16:22,273 INFO L208 MainTranslator]: Completed translation [2020-10-09 14:16:22,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:22 WrapperNode [2020-10-09 14:16:22,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 14:16:22,276 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 14:16:22,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 14:16:22,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 14:16:22,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:22" (1/1) ... [2020-10-09 14:16:22,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:22" (1/1) ... [2020-10-09 14:16:22,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 14:16:22,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 14:16:22,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 14:16:22,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 14:16:22,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:22" (1/1) ... [2020-10-09 14:16:22,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:22" (1/1) ... [2020-10-09 14:16:22,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:22" (1/1) ... [2020-10-09 14:16:22,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:22" (1/1) ... [2020-10-09 14:16:22,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:22" (1/1) ... [2020-10-09 14:16:22,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:22" (1/1) ... [2020-10-09 14:16:22,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:22" (1/1) ... [2020-10-09 14:16:22,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 14:16:22,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 14:16:22,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 14:16:22,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 14:16:22,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:22" (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 14:16:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-09 14:16:22,432 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-09 14:16:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-09 14:16:22,433 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-09 14:16:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 14:16:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 14:16:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 14:16:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 14:16:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 14:16:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 14:16:22,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 14:16:22,435 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 14:16:22,758 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 14:16:22,759 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-09 14:16:22,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:16:22 BoogieIcfgContainer [2020-10-09 14:16:22,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 14:16:22,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 14:16:22,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 14:16:22,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 14:16:22,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 02:16:21" (1/3) ... [2020-10-09 14:16:22,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e2d219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:16:22, skipping insertion in model container [2020-10-09 14:16:22,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:22" (2/3) ... [2020-10-09 14:16:22,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e2d219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:16:22, skipping insertion in model container [2020-10-09 14:16:22,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:16:22" (3/3) ... [2020-10-09 14:16:22,769 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2020-10-09 14:16:22,781 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 14:16:22,787 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 14:16:22,788 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 14:16:22,813 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,813 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,814 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,814 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,815 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,815 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,815 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,816 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,816 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,816 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,816 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,817 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,817 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,817 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,817 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,818 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,818 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,818 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,818 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,819 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,819 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,819 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,820 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,820 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,820 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,821 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,821 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,821 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,821 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,821 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,825 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,825 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,826 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,826 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,826 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,826 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,835 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,835 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,835 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,835 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,836 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,836 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:22,850 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 14:16:22,870 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 14:16:22,870 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 14:16:22,870 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 14:16:22,870 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 14:16:22,870 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 14:16:22,870 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 14:16:22,871 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 14:16:22,871 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 14:16:22,883 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-09 14:16:22,920 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-09 14:16:22,920 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:16:22,925 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-09 14:16:22,925 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 57 transitions, 124 flow [2020-10-09 14:16:22,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 116 flow [2020-10-09 14:16:22,945 INFO L129 PetriNetUnfolder]: 4/44 cut-off events. [2020-10-09 14:16:22,946 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:16:22,946 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:22,947 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] [2020-10-09 14:16:22,947 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:22,953 INFO L82 PathProgramCache]: Analyzing trace with hash 627590565, now seen corresponding path program 1 times [2020-10-09 14:16:22,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:22,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262922580] [2020-10-09 14:16:22,964 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 14:16:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:23,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 14:16:23,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:23,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:23,210 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:23,233 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 14:16:23,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:23,273 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:23,300 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 14:16:23,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262922580] [2020-10-09 14:16:23,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:16:23,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-09 14:16:23,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823261143] [2020-10-09 14:16:23,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 14:16:23,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:23,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 14:16:23,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-09 14:16:23,502 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:16:23,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 116 flow. Second operand 9 states. [2020-10-09 14:16:23,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:23,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:16:23,506 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:23,910 INFO L129 PetriNetUnfolder]: 84/383 cut-off events. [2020-10-09 14:16:23,911 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:16:23,914 INFO L80 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 383 events. 84/383 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2260 event pairs, 0 based on Foata normal form. 91/435 useless extension candidates. Maximal degree in co-relation 501. Up to 47 conditions per place. [2020-10-09 14:16:23,917 INFO L132 encePairwiseOnDemand]: 46/57 looper letters, 16 selfloop transitions, 23 changer transitions 43/118 dead transitions. [2020-10-09 14:16:23,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 118 transitions, 392 flow [2020-10-09 14:16:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 14:16:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-09 14:16:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1119 transitions. [2020-10-09 14:16:23,939 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8923444976076556 [2020-10-09 14:16:23,940 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1119 transitions. [2020-10-09 14:16:23,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1119 transitions. [2020-10-09 14:16:23,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:23,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1119 transitions. [2020-10-09 14:16:23,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-09 14:16:23,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-09 14:16:23,967 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-09 14:16:23,969 INFO L185 Difference]: Start difference. First operand has 57 places, 55 transitions, 116 flow. Second operand 22 states and 1119 transitions. [2020-10-09 14:16:23,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 118 transitions, 392 flow [2020-10-09 14:16:23,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 118 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 14:16:23,980 INFO L241 Difference]: Finished difference. Result has 94 places, 69 transitions, 266 flow [2020-10-09 14:16:23,983 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=266, PETRI_PLACES=94, PETRI_TRANSITIONS=69} [2020-10-09 14:16:23,984 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2020-10-09 14:16:23,984 INFO L481 AbstractCegarLoop]: Abstraction has has 94 places, 69 transitions, 266 flow [2020-10-09 14:16:23,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 14:16:23,984 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:23,985 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] [2020-10-09 14:16:24,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 14:16:24,189 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:24,189 INFO L82 PathProgramCache]: Analyzing trace with hash -933138607, now seen corresponding path program 1 times [2020-10-09 14:16:24,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:24,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912337810] [2020-10-09 14:16:24,191 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 14:16:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:24,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:16:24,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:24,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:24,389 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 14:16:24,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:24,405 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:24,423 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:24,464 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:24,501 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 14:16:24,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912337810] [2020-10-09 14:16:24,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:16:24,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2020-10-09 14:16:24,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929835270] [2020-10-09 14:16:24,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 14:16:24,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 14:16:24,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-09 14:16:24,736 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:16:24,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 69 transitions, 266 flow. Second operand 13 states. [2020-10-09 14:16:24,736 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:24,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:16:24,737 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:25,458 INFO L129 PetriNetUnfolder]: 91/448 cut-off events. [2020-10-09 14:16:25,459 INFO L130 PetriNetUnfolder]: For 1129/1137 co-relation queries the response was YES. [2020-10-09 14:16:25,464 INFO L80 FinitePrefix]: Finished finitePrefix Result has 936 conditions, 448 events. 91/448 cut-off events. For 1129/1137 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2615 event pairs, 0 based on Foata normal form. 22/419 useless extension candidates. Maximal degree in co-relation 894. Up to 81 conditions per place. [2020-10-09 14:16:25,467 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 21 selfloop transitions, 56 changer transitions 37/150 dead transitions. [2020-10-09 14:16:25,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 978 flow [2020-10-09 14:16:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 14:16:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-09 14:16:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1679 transitions. [2020-10-09 14:16:25,474 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8416040100250627 [2020-10-09 14:16:25,475 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1679 transitions. [2020-10-09 14:16:25,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1679 transitions. [2020-10-09 14:16:25,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:25,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1679 transitions. [2020-10-09 14:16:25,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-09 14:16:25,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-09 14:16:25,483 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-09 14:16:25,483 INFO L185 Difference]: Start difference. First operand has 94 places, 69 transitions, 266 flow. Second operand 35 states and 1679 transitions. [2020-10-09 14:16:25,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 978 flow [2020-10-09 14:16:25,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 150 transitions, 924 flow, removed 27 selfloop flow, removed 9 redundant places. [2020-10-09 14:16:25,499 INFO L241 Difference]: Finished difference. Result has 123 places, 107 transitions, 643 flow [2020-10-09 14:16:25,500 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=643, PETRI_PLACES=123, PETRI_TRANSITIONS=107} [2020-10-09 14:16:25,500 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 66 predicate places. [2020-10-09 14:16:25,501 INFO L481 AbstractCegarLoop]: Abstraction has has 123 places, 107 transitions, 643 flow [2020-10-09 14:16:25,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 14:16:25,501 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:25,501 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] [2020-10-09 14:16:25,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 14:16:25,712 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:25,713 INFO L82 PathProgramCache]: Analyzing trace with hash -979469551, now seen corresponding path program 2 times [2020-10-09 14:16:25,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:25,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877545107] [2020-10-09 14:16:25,715 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 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 14:16:25,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 14:16:25,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:16:25,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:16:25,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:25,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:16:25,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:25,840 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 14:16:25,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:25,862 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:25,878 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:25,904 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:25,941 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 14:16:25,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877545107] [2020-10-09 14:16:25,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:16:25,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2020-10-09 14:16:25,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818156571] [2020-10-09 14:16:25,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 14:16:25,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:25,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 14:16:25,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-09 14:16:26,056 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:16:26,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 107 transitions, 643 flow. Second operand 13 states. [2020-10-09 14:16:26,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:26,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:16:26,057 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:27,538 INFO L129 PetriNetUnfolder]: 196/1097 cut-off events. [2020-10-09 14:16:27,538 INFO L130 PetriNetUnfolder]: For 6279/6287 co-relation queries the response was YES. [2020-10-09 14:16:27,545 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2662 conditions, 1097 events. 196/1097 cut-off events. For 6279/6287 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8778 event pairs, 0 based on Foata normal form. 35/1015 useless extension candidates. Maximal degree in co-relation 2605. Up to 207 conditions per place. [2020-10-09 14:16:27,551 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 24 selfloop transitions, 160 changer transitions 60/280 dead transitions. [2020-10-09 14:16:27,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 280 transitions, 2673 flow [2020-10-09 14:16:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-09 14:16:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-09 14:16:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2450 transitions. [2020-10-09 14:16:27,559 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8427932576539388 [2020-10-09 14:16:27,559 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2450 transitions. [2020-10-09 14:16:27,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2450 transitions. [2020-10-09 14:16:27,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:27,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2450 transitions. [2020-10-09 14:16:27,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 52 states. [2020-10-09 14:16:27,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 52 states. [2020-10-09 14:16:27,572 INFO L81 ComplementDD]: Finished complementDD. Result 52 states. [2020-10-09 14:16:27,572 INFO L185 Difference]: Start difference. First operand has 123 places, 107 transitions, 643 flow. Second operand 51 states and 2450 transitions. [2020-10-09 14:16:27,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 280 transitions, 2673 flow [2020-10-09 14:16:27,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 280 transitions, 2477 flow, removed 74 selfloop flow, removed 20 redundant places. [2020-10-09 14:16:27,603 INFO L241 Difference]: Finished difference. Result has 172 places, 216 transitions, 1814 flow [2020-10-09 14:16:27,603 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1814, PETRI_PLACES=172, PETRI_TRANSITIONS=216} [2020-10-09 14:16:27,604 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 115 predicate places. [2020-10-09 14:16:27,604 INFO L481 AbstractCegarLoop]: Abstraction has has 172 places, 216 transitions, 1814 flow [2020-10-09 14:16:27,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 14:16:27,604 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:27,604 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 14:16:27,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 14:16:27,820 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:27,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:27,820 INFO L82 PathProgramCache]: Analyzing trace with hash 363117953, now seen corresponding path program 1 times [2020-10-09 14:16:27,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:27,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058825255] [2020-10-09 14:16:27,822 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 14:16:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:27,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 14:16:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:27,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:28,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:28,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:28,079 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,095 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,116 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,142 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,174 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:28,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058825255] [2020-10-09 14:16:28,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [911467007] [2020-10-09 14:16:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:16:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:28,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 14:16:28,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:28,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:28,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:28,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:28,549 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,556 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,561 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,565 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,575 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:28,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90003661] [2020-10-09 14:16:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:16:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:28,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 14:16:28,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:28,734 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:28,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:28,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:28,787 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,789 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,793 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,796 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,801 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:28,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:16:28,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 17 [2020-10-09 14:16:28,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402522271] [2020-10-09 14:16:28,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 14:16:28,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:28,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 14:16:28,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 14:16:29,211 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:16:29,212 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 216 transitions, 1814 flow. Second operand 17 states. [2020-10-09 14:16:29,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:29,212 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:16:29,212 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:32,709 INFO L129 PetriNetUnfolder]: 365/2198 cut-off events. [2020-10-09 14:16:32,709 INFO L130 PetriNetUnfolder]: For 22815/22856 co-relation queries the response was YES. [2020-10-09 14:16:32,732 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6080 conditions, 2198 events. 365/2198 cut-off events. For 22815/22856 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 19482 event pairs, 0 based on Foata normal form. 56/2021 useless extension candidates. Maximal degree in co-relation 6003. Up to 402 conditions per place. [2020-10-09 14:16:32,746 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 30 selfloop transitions, 401 changer transitions 77/544 dead transitions. [2020-10-09 14:16:32,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 544 transitions, 6618 flow [2020-10-09 14:16:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-09 14:16:32,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-09 14:16:32,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 3451 transitions. [2020-10-09 14:16:32,755 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8408869395711501 [2020-10-09 14:16:32,755 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 3451 transitions. [2020-10-09 14:16:32,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 3451 transitions. [2020-10-09 14:16:32,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:32,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 3451 transitions. [2020-10-09 14:16:32,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 73 states. [2020-10-09 14:16:32,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 73 states. [2020-10-09 14:16:32,821 INFO L81 ComplementDD]: Finished complementDD. Result 73 states. [2020-10-09 14:16:32,821 INFO L185 Difference]: Start difference. First operand has 172 places, 216 transitions, 1814 flow. Second operand 72 states and 3451 transitions. [2020-10-09 14:16:32,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 544 transitions, 6618 flow [2020-10-09 14:16:32,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 544 transitions, 5666 flow, removed 455 selfloop flow, removed 27 redundant places. [2020-10-09 14:16:32,903 INFO L241 Difference]: Finished difference. Result has 236 places, 463 transitions, 4606 flow [2020-10-09 14:16:32,903 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=4606, PETRI_PLACES=236, PETRI_TRANSITIONS=463} [2020-10-09 14:16:32,904 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 179 predicate places. [2020-10-09 14:16:32,904 INFO L481 AbstractCegarLoop]: Abstraction has has 236 places, 463 transitions, 4606 flow [2020-10-09 14:16:32,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 14:16:32,904 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:32,904 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 14:16:33,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:16:33,517 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:33,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1061462731, now seen corresponding path program 1 times [2020-10-09 14:16:33,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:33,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098473073] [2020-10-09 14:16:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-09 14:16:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:33,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 14:16:33,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:33,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:33,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:33,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:33,773 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:33,792 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:33,812 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:33,846 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:33,902 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:33,951 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:37,216 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 37 [2020-10-09 14:16:37,558 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:38,411 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-10-09 14:16:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:38,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098473073] [2020-10-09 14:16:38,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1159215118] [2020-10-09 14:16:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:16:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:38,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 14:16:38,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:38,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:38,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:38,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:38,761 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:38,763 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:38,765 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:38,770 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:38,773 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:38,776 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:42,352 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-09 14:16:42,448 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:46,141 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 30 [2020-10-09 14:16:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:46,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020549401] [2020-10-09 14:16:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:16:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:46,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 14:16:46,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:46,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:46,265 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:46,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:46,293 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:46,295 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:46,298 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:46,300 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:46,302 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:46,307 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:48,982 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:49,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:16:49,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 23 [2020-10-09 14:16:49,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300597175] [2020-10-09 14:16:49,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 14:16:49,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:49,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 14:16:49,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=386, Unknown=4, NotChecked=0, Total=506 [2020-10-09 14:16:53,272 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:16:53,273 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 463 transitions, 4606 flow. Second operand 23 states. [2020-10-09 14:16:53,273 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:53,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:16:53,274 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:54,059 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2020-10-09 14:17:06,703 WARN L193 SmtUtils]: Spent 9.22 s on a formula simplification. DAG size of input: 81 DAG size of output: 41 [2020-10-09 14:17:23,259 WARN L193 SmtUtils]: Spent 15.66 s on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2020-10-09 14:17:35,500 WARN L193 SmtUtils]: Spent 6.72 s on a formula simplification. DAG size of input: 72 DAG size of output: 40 [2020-10-09 14:17:37,809 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2020-10-09 14:17:52,235 WARN L193 SmtUtils]: Spent 7.63 s on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-10-09 14:17:55,046 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-09 14:18:01,338 WARN L193 SmtUtils]: Spent 4.63 s on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-09 14:18:08,276 WARN L193 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-09 14:18:37,821 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 43 [2020-10-09 14:18:53,952 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-10-09 14:19:04,031 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-09 14:19:29,679 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-09 14:19:47,185 WARN L193 SmtUtils]: Spent 10.14 s on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2020-10-09 14:20:06,381 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-10-09 14:20:21,108 WARN L193 SmtUtils]: Spent 14.21 s on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-09 14:20:26,089 WARN L193 SmtUtils]: Spent 4.71 s on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-09 14:20:36,579 WARN L193 SmtUtils]: Spent 6.22 s on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-09 14:20:50,086 WARN L193 SmtUtils]: Spent 11.37 s on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-10-09 14:21:05,204 WARN L193 SmtUtils]: Spent 3.44 s on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-09 14:21:28,343 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-09 14:21:51,947 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-10-09 14:22:17,594 WARN L193 SmtUtils]: Spent 13.80 s on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2020-10-09 14:22:38,137 WARN L193 SmtUtils]: Spent 6.24 s on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2020-10-09 14:22:58,680 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-09 14:23:15,184 WARN L193 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-09 14:23:41,253 WARN L193 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 58 [2020-10-09 14:23:54,081 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-09 14:23:58,753 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-10-09 14:24:01,944 INFO L129 PetriNetUnfolder]: 785/4798 cut-off events. [2020-10-09 14:24:01,944 INFO L130 PetriNetUnfolder]: For 91588/91770 co-relation queries the response was YES. [2020-10-09 14:24:01,982 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14201 conditions, 4798 events. 785/4798 cut-off events. For 91588/91770 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 49297 event pairs, 0 based on Foata normal form. 129/4415 useless extension candidates. Maximal degree in co-relation 14106. Up to 806 conditions per place. [2020-10-09 14:24:02,007 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 62 selfloop transitions, 959 changer transitions 159/1216 dead transitions. [2020-10-09 14:24:02,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1216 transitions, 15851 flow [2020-10-09 14:24:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-10-09 14:24:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-09 14:24:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 5368 transitions. [2020-10-09 14:24:02,021 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8408521303258145 [2020-10-09 14:24:02,021 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 5368 transitions. [2020-10-09 14:24:02,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 5368 transitions. [2020-10-09 14:24:02,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:24:02,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 5368 transitions. [2020-10-09 14:24:02,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 113 states. [2020-10-09 14:24:02,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 113 states. [2020-10-09 14:24:02,045 INFO L81 ComplementDD]: Finished complementDD. Result 113 states. [2020-10-09 14:24:02,045 INFO L185 Difference]: Start difference. First operand has 236 places, 463 transitions, 4606 flow. Second operand 112 states and 5368 transitions. [2020-10-09 14:24:02,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 1216 transitions, 15851 flow [2020-10-09 14:24:02,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 1216 transitions, 15133 flow, removed 305 selfloop flow, removed 36 redundant places. [2020-10-09 14:24:02,245 INFO L241 Difference]: Finished difference. Result has 352 places, 1051 transitions, 12210 flow [2020-10-09 14:24:02,246 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=4414, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=12210, PETRI_PLACES=352, PETRI_TRANSITIONS=1051} [2020-10-09 14:24:02,246 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 295 predicate places. [2020-10-09 14:24:02,246 INFO L481 AbstractCegarLoop]: Abstraction has has 352 places, 1051 transitions, 12210 flow [2020-10-09 14:24:02,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 14:24:02,246 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:24:02,249 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 14:24:02,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:24:02,852 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:24:02,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:24:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash -129304996, now seen corresponding path program 2 times [2020-10-09 14:24:02,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:24:02,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104099508] [2020-10-09 14:24:02,854 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 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-10-09 14:24:02,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:24:02,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:24:02,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 14:24:02,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:24:03,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:24:03,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:24:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:24:03,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:24:03,548 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:03,606 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:03,672 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:03,747 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:03,818 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:03,910 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:03,998 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:06,339 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-09 14:24:06,502 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:24:06,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104099508] [2020-10-09 14:24:06,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1417912306] [2020-10-09 14:24:06,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:24:06,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:24:06,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:24:06,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 14:24:06,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:24:06,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:24:06,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:24:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:24:06,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:24:06,913 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:06,916 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:06,919 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:06,922 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:06,924 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:06,926 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:06,928 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:07,295 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:24:07,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312635187] [2020-10-09 14:24:07,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:24:07,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:24:07,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:24:07,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 14:24:07,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:24:07,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:24:07,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:24:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:24:07,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:24:07,479 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:07,481 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:07,484 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:07,487 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:07,489 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:07,491 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:07,493 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:07,848 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:24:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:24:07,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:24:07,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 23 [2020-10-09 14:24:07,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562716514] [2020-10-09 14:24:07,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 14:24:07,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:24:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 14:24:07,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2020-10-09 14:24:08,860 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:24:08,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1051 transitions, 12210 flow. Second operand 23 states. [2020-10-09 14:24:08,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:24:08,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:24:08,862 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:24:09,099 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 14 [2020-10-09 14:24:10,112 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-09 14:24:10,688 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-09 14:24:12,710 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2020-10-09 14:24:13,147 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2020-10-09 14:24:17,957 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-09 14:24:18,256 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-09 14:24:21,087 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2020-10-09 14:24:24,278 WARN L193 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2020-10-09 14:24:25,281 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-09 14:24:36,417 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-10-09 14:24:38,664 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-10-09 14:24:43,632 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-10-09 14:24:50,109 WARN L193 SmtUtils]: Spent 6.24 s on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2020-10-09 14:24:53,546 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2020-10-09 14:25:07,560 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2020-10-09 14:25:19,724 INFO L129 PetriNetUnfolder]: 1151/7437 cut-off events. [2020-10-09 14:25:19,724 INFO L130 PetriNetUnfolder]: For 179443/179715 co-relation queries the response was YES. [2020-10-09 14:25:19,793 INFO L80 FinitePrefix]: Finished finitePrefix Result has 22601 conditions, 7437 events. 1151/7437 cut-off events. For 179443/179715 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 85543 event pairs, 0 based on Foata normal form. 140/6776 useless extension candidates. Maximal degree in co-relation 22464. Up to 949 conditions per place. [2020-10-09 14:25:19,826 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 261 selfloop transitions, 1483 changer transitions 96/1876 dead transitions. [2020-10-09 14:25:19,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 1876 transitions, 26666 flow [2020-10-09 14:25:19,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-10-09 14:25:19,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-09 14:25:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5115 transitions. [2020-10-09 14:25:19,846 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.838662075750123 [2020-10-09 14:25:19,846 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 5115 transitions. [2020-10-09 14:25:19,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 5115 transitions. [2020-10-09 14:25:19,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:25:19,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 5115 transitions. [2020-10-09 14:25:19,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 108 states. [2020-10-09 14:25:19,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 108 states. [2020-10-09 14:25:19,862 INFO L81 ComplementDD]: Finished complementDD. Result 108 states. [2020-10-09 14:25:19,863 INFO L185 Difference]: Start difference. First operand has 352 places, 1051 transitions, 12210 flow. Second operand 107 states and 5115 transitions. [2020-10-09 14:25:19,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 1876 transitions, 26666 flow [2020-10-09 14:25:20,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 1876 transitions, 26213 flow, removed 201 selfloop flow, removed 44 redundant places. [2020-10-09 14:25:20,675 INFO L241 Difference]: Finished difference. Result has 430 places, 1756 transitions, 24174 flow [2020-10-09 14:25:20,676 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=11989, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1051, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=889, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=24174, PETRI_PLACES=430, PETRI_TRANSITIONS=1756} [2020-10-09 14:25:20,677 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 373 predicate places. [2020-10-09 14:25:20,677 INFO L481 AbstractCegarLoop]: Abstraction has has 430 places, 1756 transitions, 24174 flow [2020-10-09 14:25:20,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 14:25:20,677 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:25:20,677 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 14:25:21,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 mathsat -unsat_core_generation=3 [2020-10-09 14:25:21,280 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:25:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:25:21,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1309413433, now seen corresponding path program 3 times [2020-10-09 14:25:21,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:25:21,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974741934] [2020-10-09 14:25:21,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-10-09 14:25:21,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-09 14:25:21,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:25:21,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:25:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:25:29,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:25:29,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:25:30,185 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:25:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:25:32,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:25:33,917 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:34,001 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:34,478 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:36,582 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:36,733 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:47,183 WARN L193 SmtUtils]: Spent 10.19 s on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-10-09 14:25:47,205 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:57,697 WARN L193 SmtUtils]: Spent 10.17 s on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-10-09 14:25:57,717 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:08,052 WARN L193 SmtUtils]: Spent 10.14 s on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-09 14:26:08,070 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:12,514 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-10-09 14:26:12,569 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:16,919 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2020-10-09 14:26:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:26:16,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974741934] [2020-10-09 14:26:16,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1496251315] [2020-10-09 14:26:16,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:26:17,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-09 14:26:17,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:26:17,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 14:26:17,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:26:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:26:23,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:26:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:26:30,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2020-10-09 14:26:30,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [14, 14] total 36 [2020-10-09 14:26:30,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681305378] [2020-10-09 14:26:30,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 14:26:30,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:26:30,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 14:26:30,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1074, Unknown=4, NotChecked=0, Total=1260 [2020-10-09 14:26:30,798 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 57 [2020-10-09 14:26:30,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1756 transitions, 24174 flow. Second operand 13 states. [2020-10-09 14:26:30,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:26:30,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 57 [2020-10-09 14:26:30,799 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:26:40,692 INFO L129 PetriNetUnfolder]: 1136/7240 cut-off events. [2020-10-09 14:26:40,693 INFO L130 PetriNetUnfolder]: For 157001/157157 co-relation queries the response was YES. [2020-10-09 14:26:40,770 INFO L80 FinitePrefix]: Finished finitePrefix Result has 23208 conditions, 7240 events. 1136/7240 cut-off events. For 157001/157157 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 87711 event pairs, 0 based on Foata normal form. 6/6539 useless extension candidates. Maximal degree in co-relation 23055. Up to 930 conditions per place. [2020-10-09 14:26:40,802 INFO L132 encePairwiseOnDemand]: 51/57 looper letters, 8 selfloop transitions, 21 changer transitions 0/1375 dead transitions. [2020-10-09 14:26:40,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 1375 transitions, 18152 flow [2020-10-09 14:26:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 14:26:40,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-09 14:26:40,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 858 transitions. [2020-10-09 14:26:40,808 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8362573099415205 [2020-10-09 14:26:40,808 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 858 transitions. [2020-10-09 14:26:40,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 858 transitions. [2020-10-09 14:26:40,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:26:40,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 858 transitions. [2020-10-09 14:26:40,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-09 14:26:40,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-09 14:26:40,811 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-09 14:26:40,812 INFO L185 Difference]: Start difference. First operand has 430 places, 1756 transitions, 24174 flow. Second operand 18 states and 858 transitions. [2020-10-09 14:26:40,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 1375 transitions, 18152 flow [2020-10-09 14:26:41,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1375 transitions, 17672 flow, removed 148 selfloop flow, removed 62 redundant places. [2020-10-09 14:26:41,769 INFO L241 Difference]: Finished difference. Result has 354 places, 1371 transitions, 17658 flow [2020-10-09 14:26:41,771 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=17572, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=17658, PETRI_PLACES=354, PETRI_TRANSITIONS=1371} [2020-10-09 14:26:41,771 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 297 predicate places. [2020-10-09 14:26:41,771 INFO L481 AbstractCegarLoop]: Abstraction has has 354 places, 1371 transitions, 17658 flow [2020-10-09 14:26:41,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 14:26:41,771 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:26:41,771 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 14:26:42,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3,15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:26:42,173 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:26:42,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:26:42,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2061701555, now seen corresponding path program 4 times [2020-10-09 14:26:42,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:26:42,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970905444] [2020-10-09 14:26:42,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-10-09 14:26:42,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:26:42,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:26:42,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 14:26:42,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:26:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:26:42,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:26:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:26:42,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970905444] [2020-10-09 14:26:42,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:26:42,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [] total 13 [2020-10-09 14:26:42,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135574767] [2020-10-09 14:26:42,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 14:26:42,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:26:42,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 14:26:42,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-09 14:26:43,012 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 57 [2020-10-09 14:26:43,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1371 transitions, 17658 flow. Second operand 13 states. [2020-10-09 14:26:43,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:26:43,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 57 [2020-10-09 14:26:43,014 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:26:45,149 INFO L129 PetriNetUnfolder]: 935/6861 cut-off events. [2020-10-09 14:26:45,149 INFO L130 PetriNetUnfolder]: For 32276/32416 co-relation queries the response was YES. [2020-10-09 14:26:45,213 INFO L80 FinitePrefix]: Finished finitePrefix Result has 20457 conditions, 6861 events. 935/6861 cut-off events. For 32276/32416 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 87690 event pairs, 0 based on Foata normal form. 6/6613 useless extension candidates. Maximal degree in co-relation 20359. Up to 825 conditions per place. [2020-10-09 14:26:45,239 INFO L132 encePairwiseOnDemand]: 51/57 looper letters, 8 selfloop transitions, 21 changer transitions 55/1159 dead transitions. [2020-10-09 14:26:45,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1159 transitions, 14892 flow [2020-10-09 14:26:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 14:26:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-09 14:26:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 858 transitions. [2020-10-09 14:26:45,244 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8362573099415205 [2020-10-09 14:26:45,244 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 858 transitions. [2020-10-09 14:26:45,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 858 transitions. [2020-10-09 14:26:45,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:26:45,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 858 transitions. [2020-10-09 14:26:45,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-09 14:26:45,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-09 14:26:45,248 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-09 14:26:45,248 INFO L185 Difference]: Start difference. First operand has 354 places, 1371 transitions, 17658 flow. Second operand 18 states and 858 transitions. [2020-10-09 14:26:45,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1159 transitions, 14892 flow [2020-10-09 14:26:45,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1159 transitions, 14769 flow, removed 40 selfloop flow, removed 18 redundant places. [2020-10-09 14:26:45,961 INFO L241 Difference]: Finished difference. Result has 340 places, 1100 transitions, 14050 flow [2020-10-09 14:26:45,963 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=14669, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=14050, PETRI_PLACES=340, PETRI_TRANSITIONS=1100} [2020-10-09 14:26:45,963 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 283 predicate places. [2020-10-09 14:26:45,963 INFO L481 AbstractCegarLoop]: Abstraction has has 340 places, 1100 transitions, 14050 flow [2020-10-09 14:26:45,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 14:26:45,963 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:26:45,964 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 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 14:26:46,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3 [2020-10-09 14:26:46,175 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:26:46,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:26:46,176 INFO L82 PathProgramCache]: Analyzing trace with hash 79161703, now seen corresponding path program 5 times [2020-10-09 14:26:46,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:26:46,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773570056] [2020-10-09 14:26:46,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2020-10-09 14:26:46,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-09 14:26:46,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:26:46,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:26:46,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:26:48,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:26:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:26:49,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:26:49,126 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:49,823 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:51,895 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:53,991 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:54,134 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:56,943 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:59,436 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:05,666 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:12,219 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-10-09 14:27:12,277 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:16,869 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-10-09 14:27:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:27:16,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773570056] [2020-10-09 14:27:16,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [818228278] [2020-10-09 14:27:16,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:27:17,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-09 14:27:17,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:27:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:27:17,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:27:19,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:27:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:27:19,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:27:19,204 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:19,206 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:19,208 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:19,211 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:19,214 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:22,213 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:22,230 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:22,248 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:22,309 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:27:30,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004202817] [2020-10-09 14:27:30,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:27:30,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-09 14:27:30,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:27:30,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:27:30,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:27:33,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:27:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:27:33,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:27:33,055 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:33,057 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:33,061 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:33,063 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:33,067 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:37,529 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:37,558 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:37,575 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:37,645 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:27:44,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:27:44,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 25 [2020-10-09 14:27:44,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664607621] [2020-10-09 14:27:44,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 14:27:44,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:27:44,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 14:27:44,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=445, Unknown=11, NotChecked=0, Total=600 [2020-10-09 14:27:52,932 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:27:52,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1100 transitions, 14050 flow. Second operand 25 states. [2020-10-09 14:27:52,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:27:52,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:27:52,933 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:27:55,380 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-09 14:28:06,448 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2020-10-09 14:28:25,330 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2020-10-09 14:28:31,849 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-09 14:28:49,175 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-10-09 14:29:06,584 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-10-09 14:29:06,886 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-10-09 14:29:35,929 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2020-10-09 14:29:54,327 WARN L193 SmtUtils]: Spent 6.27 s on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-10-09 14:30:09,120 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-10-09 14:30:16,565 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-09 14:30:23,782 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-10-09 14:30:31,689 WARN L193 SmtUtils]: Spent 3.14 s on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-09 14:30:38,201 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-09 14:30:45,541 WARN L193 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 64 DAG size of output: 57 Received shutdown request... [2020-10-09 14:30:53,447 WARN L210 SmtUtils]: Removed 4 from assertion stack [2020-10-09 14:30:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-09 14:30:54,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:30:54,049 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-09 14:30:54,055 WARN L235 ceAbstractionStarter]: Timeout [2020-10-09 14:30:54,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 02:30:54 BasicIcfg [2020-10-09 14:30:54,055 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 14:30:54,057 INFO L168 Benchmark]: Toolchain (without parser) took 872500.75 ms. Allocated memory was 254.8 MB in the beginning and 1.2 GB in the end (delta: 896.0 MB). Free memory was 207.4 MB in the beginning and 405.2 MB in the end (delta: -197.8 MB). Peak memory consumption was 698.3 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:54,057 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 254.8 MB. Free memory was 230.3 MB in the beginning and 229.5 MB in the end (delta: 838.9 kB). Peak memory consumption was 838.9 kB. Max. memory is 14.2 GB. [2020-10-09 14:30:54,058 INFO L168 Benchmark]: CACSL2BoogieTranslator took 718.28 ms. Allocated memory was 254.8 MB in the beginning and 326.6 MB in the end (delta: 71.8 MB). Free memory was 207.4 MB in the beginning and 279.3 MB in the end (delta: -71.9 MB). Peak memory consumption was 29.4 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:54,058 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.46 ms. Allocated memory is still 326.6 MB. Free memory was 279.3 MB in the beginning and 277.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:54,059 INFO L168 Benchmark]: Boogie Preprocessor took 26.32 ms. Allocated memory is still 326.6 MB. Free memory was 277.7 MB in the beginning and 276.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:54,059 INFO L168 Benchmark]: RCFGBuilder took 390.42 ms. Allocated memory is still 326.6 MB. Free memory was 276.0 MB in the beginning and 254.8 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:54,060 INFO L168 Benchmark]: TraceAbstraction took 871293.24 ms. Allocated memory was 326.6 MB in the beginning and 1.2 GB in the end (delta: 824.2 MB). Free memory was 254.0 MB in the beginning and 405.2 MB in the end (delta: -151.2 MB). Peak memory consumption was 673.0 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:54,063 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 254.8 MB. Free memory was 230.3 MB in the beginning and 229.5 MB in the end (delta: 838.9 kB). Peak memory consumption was 838.9 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 718.28 ms. Allocated memory was 254.8 MB in the beginning and 326.6 MB in the end (delta: 71.8 MB). Free memory was 207.4 MB in the beginning and 279.3 MB in the end (delta: -71.9 MB). Peak memory consumption was 29.4 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 67.46 ms. Allocated memory is still 326.6 MB. Free memory was 279.3 MB in the beginning and 277.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.32 ms. Allocated memory is still 326.6 MB. Free memory was 277.7 MB in the beginning and 276.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * RCFGBuilder took 390.42 ms. Allocated memory is still 326.6 MB. Free memory was 276.0 MB in the beginning and 254.8 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 14.2 GB. * TraceAbstraction took 871293.24 ms. Allocated memory was 326.6 MB in the beginning and 1.2 GB in the end (delta: 824.2 MB). Free memory was 254.0 MB in the beginning and 405.2 MB in the end (delta: -151.2 MB). Peak memory consumption was 673.0 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 78 for 4828ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 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: TIMEOUT, OverallTime: 871.1s, OverallIterations: 9, TraceHistogramMax: 6, AutomataDifference: 717.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 598 SDslu, 324 SDs, 0 SdLazy, 2583 SolverSat, 857 SolverUnsat, 85 SolverUnknown, 0 SolverNotchecked, 172.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2163 GetRequests, 1601 SyntacticMatches, 33 SemanticMatches, 528 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14543 ImplicationChecksByTransitivity, 654.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24174occurred in iteration=6, 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: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 148.6s InterpolantComputationTime, 911 NumberOfCodeBlocks, 909 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1786 ConstructedInterpolants, 259 QuantifiedInterpolants, 1406432 SizeOfPredicates, 86 NumberOfNonLiveVariables, 2074 ConjunctsInSsa, 223 ConjunctsInUnsatCore, 36 InterpolantComputations, 10 PerfectInterpolantSequences, 248/1086 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 could not prove your program: Timeout Completed graceful shutdown