/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_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 14:16:26,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 14:16:27,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 14:16:27,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 14:16:27,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 14:16:27,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 14:16:27,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 14:16:27,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 14:16:27,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 14:16:27,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 14:16:27,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 14:16:27,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 14:16:27,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 14:16:27,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 14:16:27,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 14:16:27,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 14:16:27,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 14:16:27,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 14:16:27,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 14:16:27,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 14:16:27,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 14:16:27,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 14:16:27,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 14:16:27,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 14:16:27,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 14:16:27,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 14:16:27,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 14:16:27,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 14:16:27,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 14:16:27,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 14:16:27,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 14:16:27,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 14:16:27,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 14:16:27,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 14:16:27,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 14:16:27,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 14:16:27,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 14:16:27,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 14:16:27,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 14:16:27,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 14:16:27,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 14:16:27,060 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 14:16:27,082 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 14:16:27,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 14:16:27,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 14:16:27,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 14:16:27,084 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 14:16:27,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 14:16:27,084 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 14:16:27,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 14:16:27,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 14:16:27,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 14:16:27,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 14:16:27,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 14:16:27,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 14:16:27,086 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 14:16:27,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 14:16:27,086 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 14:16:27,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 14:16:27,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 14:16:27,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 14:16:27,087 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 14:16:27,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 14:16:27,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:16:27,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 14:16:27,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 14:16:27,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 14:16:27,088 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 14:16:27,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 14:16:27,089 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 14:16:27,089 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 14:16:27,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 14:16:27,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 14:16:27,445 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 14:16:27,449 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 14:16:27,450 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 14:16:27,452 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 14:16:27,453 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-10-09 14:16:27,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9e3f0366/e0f53591bfb04682807583331f65124f/FLAG113acb7a6 [2020-10-09 14:16:28,077 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 14:16:28,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-10-09 14:16:28,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9e3f0366/e0f53591bfb04682807583331f65124f/FLAG113acb7a6 [2020-10-09 14:16:28,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9e3f0366/e0f53591bfb04682807583331f65124f [2020-10-09 14:16:28,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 14:16:28,387 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 14:16:28,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 14:16:28,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 14:16:28,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 14:16:28,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:16:28" (1/1) ... [2020-10-09 14:16:28,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aa7bde9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:28, skipping insertion in model container [2020-10-09 14:16:28,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:16:28" (1/1) ... [2020-10-09 14:16:28,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 14:16:28,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 14:16:28,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:16:28,997 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 14:16:29,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:16:29,169 INFO L208 MainTranslator]: Completed translation [2020-10-09 14:16:29,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29 WrapperNode [2020-10-09 14:16:29,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 14:16:29,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 14:16:29,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 14:16:29,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 14:16:29,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 14:16:29,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 14:16:29,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 14:16:29,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 14:16:29,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 14:16:29,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 14:16:29,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 14:16:29,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 14:16:29,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (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 14:16:29,350 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-09 14:16:29,350 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-09 14:16:29,350 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-09 14:16:29,350 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-09 14:16:29,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 14:16:29,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 14:16:29,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 14:16:29,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 14:16:29,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 14:16:29,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 14:16:29,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 14:16:29,353 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 14:16:29,707 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 14:16:29,707 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-09 14:16:29,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:16:29 BoogieIcfgContainer [2020-10-09 14:16:29,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 14:16:29,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 14:16:29,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 14:16:29,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 14:16:29,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 02:16:28" (1/3) ... [2020-10-09 14:16:29,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e126f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:16:29, skipping insertion in model container [2020-10-09 14:16:29,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (2/3) ... [2020-10-09 14:16:29,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e126f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:16:29, skipping insertion in model container [2020-10-09 14:16:29,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:16:29" (3/3) ... [2020-10-09 14:16:29,718 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-10-09 14:16:29,733 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 14:16:29,740 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 14:16:29,741 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 14:16:29,765 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,765 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,765 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,766 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,766 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,766 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,767 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,767 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,767 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,767 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,768 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,768 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,768 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,769 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,769 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,769 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,770 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,770 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,770 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,770 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,770 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,771 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,771 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,771 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,771 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,772 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,772 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,772 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,772 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,773 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,776 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,777 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,777 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,777 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,778 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,778 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,784 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,784 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,784 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,784 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,785 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,785 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,807 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 14:16:29,830 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 14:16:29,830 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 14:16:29,830 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 14:16:29,830 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 14:16:29,831 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 14:16:29,831 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 14:16:29,831 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 14:16:29,831 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 14:16:29,843 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-09 14:16:29,879 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-09 14:16:29,879 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:16:29,885 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 14:16:29,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 57 transitions, 124 flow [2020-10-09 14:16:29,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 116 flow [2020-10-09 14:16:29,907 INFO L129 PetriNetUnfolder]: 4/42 cut-off events. [2020-10-09 14:16:29,907 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:16:29,907 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:29,908 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 14:16:29,909 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:29,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:29,915 INFO L82 PathProgramCache]: Analyzing trace with hash -229509324, now seen corresponding path program 1 times [2020-10-09 14:16:29,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:29,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811196159] [2020-10-09 14:16:29,928 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 14:16:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:30,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 14:16:30,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:30,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:30,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:30,167 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 14:16:30,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:30,213 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:30,236 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 14:16:30,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811196159] [2020-10-09 14:16:30,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:16:30,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-09 14:16:30,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527721202] [2020-10-09 14:16:30,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 14:16:30,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:30,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 14:16:30,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-09 14:16:30,452 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:16:30,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 116 flow. Second operand 9 states. [2020-10-09 14:16:30,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:30,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:16:30,456 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:30,877 INFO L129 PetriNetUnfolder]: 84/383 cut-off events. [2020-10-09 14:16:30,878 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:16:30,881 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 33. Compared 2262 event pairs, 0 based on Foata normal form. 91/433 useless extension candidates. Maximal degree in co-relation 501. Up to 47 conditions per place. [2020-10-09 14:16:30,884 INFO L132 encePairwiseOnDemand]: 46/57 looper letters, 16 selfloop transitions, 23 changer transitions 43/118 dead transitions. [2020-10-09 14:16:30,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 118 transitions, 392 flow [2020-10-09 14:16:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 14:16:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-09 14:16:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1119 transitions. [2020-10-09 14:16:30,908 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8923444976076556 [2020-10-09 14:16:30,908 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1119 transitions. [2020-10-09 14:16:30,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1119 transitions. [2020-10-09 14:16:30,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:30,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1119 transitions. [2020-10-09 14:16:30,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-09 14:16:30,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-09 14:16:30,937 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-09 14:16:30,939 INFO L185 Difference]: Start difference. First operand has 57 places, 55 transitions, 116 flow. Second operand 22 states and 1119 transitions. [2020-10-09 14:16:30,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 118 transitions, 392 flow [2020-10-09 14:16:30,945 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 14:16:30,951 INFO L241 Difference]: Finished difference. Result has 94 places, 69 transitions, 266 flow [2020-10-09 14:16:30,954 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 14:16:30,955 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2020-10-09 14:16:30,956 INFO L481 AbstractCegarLoop]: Abstraction has has 94 places, 69 transitions, 266 flow [2020-10-09 14:16:30,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 14:16:30,956 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:30,956 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 14:16:31,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 14:16:31,168 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:31,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:31,168 INFO L82 PathProgramCache]: Analyzing trace with hash 468266528, now seen corresponding path program 1 times [2020-10-09 14:16:31,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:31,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195266567] [2020-10-09 14:16:31,171 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 14:16:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:31,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:16:31,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:31,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:31,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:31,379 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:31,396 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:31,437 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:31,477 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 14:16:31,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195266567] [2020-10-09 14:16:31,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:16:31,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2020-10-09 14:16:31,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869505872] [2020-10-09 14:16:31,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 14:16:31,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:31,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 14:16:31,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-09 14:16:31,717 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:16:31,718 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 69 transitions, 266 flow. Second operand 13 states. [2020-10-09 14:16:31,718 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:31,718 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:16:31,718 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:32,492 INFO L129 PetriNetUnfolder]: 91/434 cut-off events. [2020-10-09 14:16:32,492 INFO L130 PetriNetUnfolder]: For 1119/1127 co-relation queries the response was YES. [2020-10-09 14:16:32,497 INFO L80 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 434 events. 91/434 cut-off events. For 1119/1127 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2469 event pairs, 0 based on Foata normal form. 22/407 useless extension candidates. Maximal degree in co-relation 880. Up to 81 conditions per place. [2020-10-09 14:16:32,500 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 21 selfloop transitions, 56 changer transitions 37/150 dead transitions. [2020-10-09 14:16:32,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 978 flow [2020-10-09 14:16:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 14:16:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-09 14:16:32,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1679 transitions. [2020-10-09 14:16:32,507 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8416040100250627 [2020-10-09 14:16:32,507 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1679 transitions. [2020-10-09 14:16:32,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1679 transitions. [2020-10-09 14:16:32,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:32,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1679 transitions. [2020-10-09 14:16:32,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-09 14:16:32,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-09 14:16:32,519 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-09 14:16:32,519 INFO L185 Difference]: Start difference. First operand has 94 places, 69 transitions, 266 flow. Second operand 35 states and 1679 transitions. [2020-10-09 14:16:32,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 978 flow [2020-10-09 14:16:32,526 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 14:16:32,531 INFO L241 Difference]: Finished difference. Result has 123 places, 107 transitions, 643 flow [2020-10-09 14:16:32,531 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 14:16:32,532 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 66 predicate places. [2020-10-09 14:16:32,532 INFO L481 AbstractCegarLoop]: Abstraction has has 123 places, 107 transitions, 643 flow [2020-10-09 14:16:32,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 14:16:32,533 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:32,533 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 14:16:32,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 14:16:32,746 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:32,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1901362848, now seen corresponding path program 2 times [2020-10-09 14:16:32,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:32,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650126006] [2020-10-09 14:16:32,747 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 14:16:32,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 14:16:32,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:16:32,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:16:32,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:32,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:16:32,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:32,876 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 14:16:32,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:32,907 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:32,924 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:32,944 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:32,974 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 14:16:32,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650126006] [2020-10-09 14:16:32,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:16:32,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2020-10-09 14:16:32,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920652662] [2020-10-09 14:16:32,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 14:16:32,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:32,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 14:16:32,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-09 14:16:33,080 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:16:33,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 107 transitions, 643 flow. Second operand 13 states. [2020-10-09 14:16:33,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:33,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:16:33,082 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:34,519 INFO L129 PetriNetUnfolder]: 196/1076 cut-off events. [2020-10-09 14:16:34,520 INFO L130 PetriNetUnfolder]: For 6246/6254 co-relation queries the response was YES. [2020-10-09 14:16:34,528 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2641 conditions, 1076 events. 196/1076 cut-off events. For 6246/6254 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 8513 event pairs, 0 based on Foata normal form. 35/997 useless extension candidates. Maximal degree in co-relation 2584. Up to 207 conditions per place. [2020-10-09 14:16:34,535 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 24 selfloop transitions, 160 changer transitions 60/280 dead transitions. [2020-10-09 14:16:34,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 280 transitions, 2673 flow [2020-10-09 14:16:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-09 14:16:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-09 14:16:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2450 transitions. [2020-10-09 14:16:34,545 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8427932576539388 [2020-10-09 14:16:34,545 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2450 transitions. [2020-10-09 14:16:34,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2450 transitions. [2020-10-09 14:16:34,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:34,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2450 transitions. [2020-10-09 14:16:34,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 52 states. [2020-10-09 14:16:34,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 52 states. [2020-10-09 14:16:34,560 INFO L81 ComplementDD]: Finished complementDD. Result 52 states. [2020-10-09 14:16:34,560 INFO L185 Difference]: Start difference. First operand has 123 places, 107 transitions, 643 flow. Second operand 51 states and 2450 transitions. [2020-10-09 14:16:34,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 280 transitions, 2673 flow [2020-10-09 14:16:34,579 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 14:16:34,586 INFO L241 Difference]: Finished difference. Result has 172 places, 216 transitions, 1814 flow [2020-10-09 14:16:34,586 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 14:16:34,587 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 115 predicate places. [2020-10-09 14:16:34,587 INFO L481 AbstractCegarLoop]: Abstraction has has 172 places, 216 transitions, 1814 flow [2020-10-09 14:16:34,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 14:16:34,587 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:34,587 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 14:16:34,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 14:16:34,799 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:34,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:34,800 INFO L82 PathProgramCache]: Analyzing trace with hash 748426656, now seen corresponding path program 1 times [2020-10-09 14:16:34,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:34,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794514890] [2020-10-09 14:16:34,800 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 14:16:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:34,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 14:16:34,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:34,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:35,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:35,065 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 14:16:35,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:35,097 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,119 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,145 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,179 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,216 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,339 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 14:16:35,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794514890] [2020-10-09 14:16:35,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [954843265] [2020-10-09 14:16:35,352 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 14:16:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:35,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 14:16:35,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:35,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:35,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:35,523 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 14:16:35,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:35,529 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,541 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,546 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,552 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,563 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,651 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 14:16:35,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564512635] [2020-10-09 14:16:35,652 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 14:16:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:35,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 14:16:35,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:35,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:35,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:35,793 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 14:16:35,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:35,796 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,799 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,802 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,805 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,810 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,882 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 14:16:35,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:16:35,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 17 [2020-10-09 14:16:35,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686187001] [2020-10-09 14:16:35,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 14:16:35,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:35,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 14:16:35,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 14:16:36,270 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:16:36,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 216 transitions, 1814 flow. Second operand 17 states. [2020-10-09 14:16:36,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:36,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:16:36,272 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:39,945 INFO L129 PetriNetUnfolder]: 365/2205 cut-off events. [2020-10-09 14:16:39,945 INFO L130 PetriNetUnfolder]: For 22805/22844 co-relation queries the response was YES. [2020-10-09 14:16:39,962 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6087 conditions, 2205 events. 365/2205 cut-off events. For 22805/22844 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 19602 event pairs, 0 based on Foata normal form. 54/2025 useless extension candidates. Maximal degree in co-relation 6010. Up to 402 conditions per place. [2020-10-09 14:16:39,975 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 30 selfloop transitions, 401 changer transitions 77/544 dead transitions. [2020-10-09 14:16:39,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 544 transitions, 6618 flow [2020-10-09 14:16:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-09 14:16:39,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-09 14:16:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 3451 transitions. [2020-10-09 14:16:39,981 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8408869395711501 [2020-10-09 14:16:39,981 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 3451 transitions. [2020-10-09 14:16:39,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 3451 transitions. [2020-10-09 14:16:39,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:39,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 3451 transitions. [2020-10-09 14:16:39,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 73 states. [2020-10-09 14:16:39,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 73 states. [2020-10-09 14:16:39,995 INFO L81 ComplementDD]: Finished complementDD. Result 73 states. [2020-10-09 14:16:39,995 INFO L185 Difference]: Start difference. First operand has 172 places, 216 transitions, 1814 flow. Second operand 72 states and 3451 transitions. [2020-10-09 14:16:39,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 544 transitions, 6618 flow [2020-10-09 14:16:40,059 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 14:16:40,069 INFO L241 Difference]: Finished difference. Result has 236 places, 463 transitions, 4606 flow [2020-10-09 14:16:40,070 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 14:16:40,070 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 179 predicate places. [2020-10-09 14:16:40,070 INFO L481 AbstractCegarLoop]: Abstraction has has 236 places, 463 transitions, 4606 flow [2020-10-09 14:16:40,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 14:16:40,071 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:40,071 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 14:16:40,688 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 14:16:40,689 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:40,690 INFO L82 PathProgramCache]: Analyzing trace with hash 103784628, now seen corresponding path program 1 times [2020-10-09 14:16:40,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:40,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730378894] [2020-10-09 14:16:40,691 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 14:16:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:40,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 14:16:40,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:40,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:40,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:40,951 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 14:16:40,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:40,987 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:41,009 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:41,031 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:41,072 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:41,122 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:41,179 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:43,472 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 42 [2020-10-09 14:16:44,230 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:47,063 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification that was a NOOP. DAG size: 40 [2020-10-09 14:16:47,105 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 14:16:47,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730378894] [2020-10-09 14:16:47,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1554122553] [2020-10-09 14:16:47,106 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 14:16:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:47,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 14:16:47,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:47,233 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:47,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:47,293 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 14:16:47,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:47,296 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:47,298 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:47,300 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:47,304 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:47,307 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:47,311 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:58,151 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 34 [2020-10-09 14:16:58,257 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:17:06,437 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 30 [2020-10-09 14:17:06,468 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 14:17:06,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858190878] [2020-10-09 14:17:06,469 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 14:17:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:17:06,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 14:17:06,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:17:06,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:17:06,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:17:06,617 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 14:17:06,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:17:06,619 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:17:06,621 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:17:06,623 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:17:06,625 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:17:06,628 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:17:06,631 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:17:14,086 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:17:14,126 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 14:17:14,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:17:14,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 23 [2020-10-09 14:17:14,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165234915] [2020-10-09 14:17:14,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 14:17:14,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:17:14,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 14:17:14,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=377, Unknown=7, NotChecked=0, Total=506 [2020-10-09 14:17:19,188 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:17:19,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 463 transitions, 4606 flow. Second operand 23 states. [2020-10-09 14:17:19,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:17:19,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:17:19,189 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:17:53,930 WARN L193 SmtUtils]: Spent 34.04 s on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-10-09 14:18:38,522 WARN L193 SmtUtils]: Spent 39.73 s on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2020-10-09 14:18:42,298 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2020-10-09 14:19:06,841 WARN L193 SmtUtils]: Spent 5.32 s on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2020-10-09 14:19:39,914 WARN L193 SmtUtils]: Spent 12.66 s on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-09 14:20:14,864 WARN L193 SmtUtils]: Spent 15.41 s on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-10-09 14:21:00,338 WARN L193 SmtUtils]: Spent 22.74 s on a formula simplification. DAG size of input: 102 DAG size of output: 77 [2020-10-09 14:21:19,985 WARN L193 SmtUtils]: Spent 12.34 s on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-09 14:21:34,377 WARN L193 SmtUtils]: Spent 13.51 s on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-09 14:22:01,258 WARN L193 SmtUtils]: Spent 16.29 s on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-09 14:22:14,303 WARN L193 SmtUtils]: Spent 12.45 s on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-09 14:22:23,254 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2020-10-09 14:22:23,920 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-10-09 14:23:17,583 WARN L193 SmtUtils]: Spent 49.90 s on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-10-09 14:23:17,814 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-10-09 14:23:41,293 WARN L193 SmtUtils]: Spent 17.73 s on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-10-09 14:23:57,087 WARN L193 SmtUtils]: Spent 14.99 s on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-09 14:24:09,856 WARN L193 SmtUtils]: Spent 12.47 s on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-09 14:25:05,155 WARN L193 SmtUtils]: Spent 22.64 s on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-10-09 14:25:21,421 WARN L193 SmtUtils]: Spent 15.12 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-09 14:25:34,683 WARN L193 SmtUtils]: Spent 12.44 s on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-09 14:25:37,426 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-10-09 14:25:58,339 WARN L193 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-09 14:26:14,395 WARN L193 SmtUtils]: Spent 15.70 s on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-09 14:26:15,181 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-10-09 14:26:32,417 WARN L193 SmtUtils]: Spent 6.11 s on a formula simplification that was a NOOP. DAG size: 59 [2020-10-09 14:26:33,136 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-10-09 14:26:39,083 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-10-09 14:26:47,670 WARN L193 SmtUtils]: Spent 8.19 s on a formula simplification that was a NOOP. DAG size: 63 [2020-10-09 14:26:49,041 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-10-09 14:26:49,543 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-09 14:26:50,225 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-10-09 14:26:50,589 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-10-09 14:26:51,393 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2020-10-09 14:26:51,729 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-10-09 14:26:52,164 INFO L129 PetriNetUnfolder]: 680/4310 cut-off events. [2020-10-09 14:26:52,165 INFO L130 PetriNetUnfolder]: For 63500/63642 co-relation queries the response was YES. [2020-10-09 14:26:52,207 INFO L80 FinitePrefix]: Finished finitePrefix Result has 12009 conditions, 4310 events. 680/4310 cut-off events. For 63500/63642 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 42496 event pairs, 0 based on Foata normal form. 103/3955 useless extension candidates. Maximal degree in co-relation 11914. Up to 690 conditions per place. [2020-10-09 14:26:52,232 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 40 selfloop transitions, 885 changer transitions 114/1075 dead transitions. [2020-10-09 14:26:52,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1075 transitions, 13890 flow [2020-10-09 14:26:52,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-10-09 14:26:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-09 14:26:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 4601 transitions. [2020-10-09 14:26:52,247 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8408260233918129 [2020-10-09 14:26:52,248 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 4601 transitions. [2020-10-09 14:26:52,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 4601 transitions. [2020-10-09 14:26:52,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:26:52,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 4601 transitions. [2020-10-09 14:26:52,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 97 states. [2020-10-09 14:26:52,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 97 states. [2020-10-09 14:26:52,266 INFO L81 ComplementDD]: Finished complementDD. Result 97 states. [2020-10-09 14:26:52,266 INFO L185 Difference]: Start difference. First operand has 236 places, 463 transitions, 4606 flow. Second operand 96 states and 4601 transitions. [2020-10-09 14:26:52,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1075 transitions, 13890 flow [2020-10-09 14:26:52,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1075 transitions, 13262 flow, removed 260 selfloop flow, removed 36 redundant places. [2020-10-09 14:26:52,518 INFO L241 Difference]: Finished difference. Result has 327 places, 957 transitions, 11242 flow [2020-10-09 14:26:52,519 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=96, PETRI_FLOW=11242, PETRI_PLACES=327, PETRI_TRANSITIONS=957} [2020-10-09 14:26:52,519 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 270 predicate places. [2020-10-09 14:26:52,519 INFO L481 AbstractCegarLoop]: Abstraction has has 327 places, 957 transitions, 11242 flow [2020-10-09 14:26:52,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 14:26:52,520 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:26:52,520 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 14:26:53,128 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 14:26:53,129 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:26:53,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:26:53,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1357157523, now seen corresponding path program 2 times [2020-10-09 14:26:53,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:26:53,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378396550] [2020-10-09 14:26:53,131 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 14:26:53,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:26:53,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:26:53,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 14:26:53,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:26:53,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:26:54,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:26:54,305 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 14:26:54,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:26:54,530 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:54,652 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:54,923 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-10-09 14:26:54,927 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:55,085 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:55,239 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:55,450 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:26:55,676 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:08,092 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-09 14:27:08,173 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:08,488 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 14:27:08,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378396550] [2020-10-09 14:27:08,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [553066212] [2020-10-09 14:27:08,489 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 14:27:08,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:27:08,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:27:08,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 14:27:08,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:27:08,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:27:08,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:27:08,752 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 14:27:08,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:27:08,754 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:08,759 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:08,763 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:08,767 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:08,772 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:08,774 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:08,777 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:19,203 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:19,250 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 14:27:19,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627684129] [2020-10-09 14:27:19,251 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 14:27:19,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:27:19,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:27:19,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 14:27:19,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:27:19,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:27:19,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:27:19,492 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 14:27:19,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:27:19,494 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:19,505 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:19,512 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:19,518 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:19,523 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:19,529 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:19,531 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:29,992 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:27:30,045 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 14:27:30,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:27:30,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 23 [2020-10-09 14:27:30,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968620071] [2020-10-09 14:27:30,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 14:27:30,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:27:30,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 14:27:30,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=382, Unknown=5, NotChecked=0, Total=506 [2020-10-09 14:27:31,416 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:27:31,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 957 transitions, 11242 flow. Second operand 23 states. [2020-10-09 14:27:31,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:27:31,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:27:31,418 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:27:31,850 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 14 [2020-10-09 14:27:32,228 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 15 [2020-10-09 14:27:38,724 WARN L193 SmtUtils]: Spent 5.12 s on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2020-10-09 14:27:44,120 WARN L193 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2020-10-09 14:27:44,359 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2020-10-09 14:27:45,253 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2020-10-09 14:27:45,618 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 15 [2020-10-09 14:27:46,235 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-10-09 14:27:49,281 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-09 14:27:49,694 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2020-10-09 14:27:52,272 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-10-09 14:27:54,761 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-09 14:28:00,349 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-09 14:28:03,630 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-10-09 14:28:04,469 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-10-09 14:28:04,710 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2020-10-09 14:28:08,177 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-09 14:28:08,675 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2020-10-09 14:28:09,256 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-09 14:28:16,927 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-10-09 14:28:19,548 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-10-09 14:28:19,814 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-10-09 14:28:26,642 WARN L193 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2020-10-09 14:28:31,566 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2020-10-09 14:28:36,011 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-10-09 14:28:43,059 WARN L193 SmtUtils]: Spent 6.14 s on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-10-09 14:28:51,781 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-10-09 14:28:57,537 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2020-10-09 14:29:00,307 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2020-10-09 14:29:02,724 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-10-09 14:29:05,373 WARN L193 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2020-10-09 14:29:12,656 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2020-10-09 14:29:18,960 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-10-09 14:29:21,368 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-10-09 14:29:26,193 WARN L193 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-10-09 14:29:30,035 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-10-09 14:29:43,459 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-10-09 14:29:44,215 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2020-10-09 14:29:44,811 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-09 14:29:52,121 WARN L193 SmtUtils]: Spent 7.13 s on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2020-10-09 14:29:57,080 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-10-09 14:30:03,991 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2020-10-09 14:30:11,694 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-10-09 14:30:12,148 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2020-10-09 14:30:15,508 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-10-09 14:30:20,101 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2020-10-09 14:30:20,959 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-10-09 14:30:21,545 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2020-10-09 14:30:22,086 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-10-09 14:30:22,431 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-10-09 14:30:23,094 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2020-10-09 14:30:23,439 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-10-09 14:30:23,747 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-10-09 14:30:25,278 INFO L129 PetriNetUnfolder]: 1226/8036 cut-off events. [2020-10-09 14:30:25,278 INFO L130 PetriNetUnfolder]: For 157096/157320 co-relation queries the response was YES. [2020-10-09 14:30:25,407 INFO L80 FinitePrefix]: Finished finitePrefix Result has 23232 conditions, 8036 events. 1226/8036 cut-off events. For 157096/157320 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 91203 event pairs, 0 based on Foata normal form. 142/7321 useless extension candidates. Maximal degree in co-relation 23104. Up to 1022 conditions per place. [2020-10-09 14:30:25,458 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 217 selfloop transitions, 1662 changer transitions 116/2031 dead transitions. [2020-10-09 14:30:25,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 2031 transitions, 28800 flow [2020-10-09 14:30:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-10-09 14:30:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-09 14:30:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 5600 transitions. [2020-10-09 14:30:25,479 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8397061028639976 [2020-10-09 14:30:25,479 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 5600 transitions. [2020-10-09 14:30:25,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 5600 transitions. [2020-10-09 14:30:25,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:30:25,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 5600 transitions. [2020-10-09 14:30:25,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 118 states. [2020-10-09 14:30:25,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 118 states. [2020-10-09 14:30:25,504 INFO L81 ComplementDD]: Finished complementDD. Result 118 states. [2020-10-09 14:30:25,505 INFO L185 Difference]: Start difference. First operand has 327 places, 957 transitions, 11242 flow. Second operand 117 states and 5600 transitions. [2020-10-09 14:30:25,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 2031 transitions, 28800 flow [2020-10-09 14:30:26,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 2031 transitions, 28473 flow, removed 140 selfloop flow, removed 39 redundant places. [2020-10-09 14:30:26,559 INFO L241 Difference]: Finished difference. Result has 435 places, 1906 transitions, 25824 flow [2020-10-09 14:30:26,561 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=11083, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=871, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=25824, PETRI_PLACES=435, PETRI_TRANSITIONS=1906} [2020-10-09 14:30:26,561 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 378 predicate places. [2020-10-09 14:30:26,561 INFO L481 AbstractCegarLoop]: Abstraction has has 435 places, 1906 transitions, 25824 flow [2020-10-09 14:30:26,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 14:30:26,562 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:30:26,562 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 14:30:27,165 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 14:30:27,166 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:30:27,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:30:27,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1457082832, now seen corresponding path program 3 times [2020-10-09 14:30:27,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:30:27,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677307680] [2020-10-09 14:30:27,169 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 14:30:27,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-09 14:30:27,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:30:27,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:30:27,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:30:27,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:30:28,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:30:28,272 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 14:30:28,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:30:28,450 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:28,550 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:28,652 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:28,762 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:28,878 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:28,997 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:29,215 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:29,455 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:29,731 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:29,998 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 14:30:29,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677307680] [2020-10-09 14:30:29,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [333385266] [2020-10-09 14:30:29,999 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 14:30:30,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-09 14:30:30,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:30:30,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:30:30,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:30:30,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:30:30,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:30:30,257 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 14:30:30,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:30:30,258 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,268 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,273 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,277 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,284 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,289 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,291 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,294 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,298 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,418 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 14:30:30,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480539511] [2020-10-09 14:30:30,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:30:30,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-09 14:30:30,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:30:30,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:30:30,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:30:30,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:30:30,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:30:30,599 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 14:30:30,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:30:30,602 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,610 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,614 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,621 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,625 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,628 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,630 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,631 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,635 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:30,653 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 14:30:30,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:30:30,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 25 [2020-10-09 14:30:30,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170062171] [2020-10-09 14:30:30,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 14:30:30,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:30:30,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 14:30:30,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2020-10-09 14:30:37,051 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:30:37,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 1906 transitions, 25824 flow. Second operand 25 states. [2020-10-09 14:30:37,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:30:37,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:30:37,052 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:30:37,314 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 10 [2020-10-09 14:30:37,545 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2020-10-09 14:30:37,751 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2020-10-09 14:30:37,961 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2020-10-09 14:30:38,478 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2020-10-09 14:30:39,037 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-10-09 14:30:39,359 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2020-10-09 14:30:39,519 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2020-10-09 14:30:41,300 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2020-10-09 14:30:41,550 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2020-10-09 14:30:43,198 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2020-10-09 14:30:43,501 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2020-10-09 14:30:43,755 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2020-10-09 14:30:44,084 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2020-10-09 14:30:45,073 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-10-09 14:30:45,331 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2020-10-09 14:30:45,733 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2020-10-09 14:30:46,017 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2020-10-09 14:30:46,486 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2020-10-09 14:30:47,333 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2020-10-09 14:30:47,635 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-10-09 14:30:47,917 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2020-10-09 14:30:49,039 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-10-09 14:30:49,617 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2020-10-09 14:30:50,061 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2020-10-09 14:30:51,244 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2020-10-09 14:30:51,629 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2020-10-09 14:30:52,187 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2020-10-09 14:30:52,655 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2020-10-09 14:30:52,943 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2020-10-09 14:30:53,812 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2020-10-09 14:30:55,446 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2020-10-09 14:30:55,728 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2020-10-09 14:30:56,503 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-10-09 14:30:57,862 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2020-10-09 14:30:58,212 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2020-10-09 14:30:58,532 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2020-10-09 14:30:58,808 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-10-09 14:30:59,129 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 Received shutdown request... [2020-10-09 14:30:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-10-09 14:30:59,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 mathsat -unsat_core_generation=3,15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:30:59,869 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-09 14:30:59,875 WARN L235 ceAbstractionStarter]: Timeout [2020-10-09 14:30:59,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 02:30:59 BasicIcfg [2020-10-09 14:30:59,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 14:30:59,877 INFO L168 Benchmark]: Toolchain (without parser) took 871490.47 ms. Allocated memory was 243.8 MB in the beginning and 977.3 MB in the end (delta: 733.5 MB). Free memory was 198.3 MB in the beginning and 238.9 MB in the end (delta: -40.5 MB). Peak memory consumption was 692.9 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:59,877 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 243.8 MB. Free memory is still 220.2 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 14:30:59,877 INFO L168 Benchmark]: CACSL2BoogieTranslator took 783.55 ms. Allocated memory was 243.8 MB in the beginning and 293.1 MB in the end (delta: 49.3 MB). Free memory was 198.3 MB in the beginning and 245.9 MB in the end (delta: -47.6 MB). Peak memory consumption was 30.4 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:59,878 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.95 ms. Allocated memory is still 293.1 MB. Free memory is still 245.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 14:30:59,878 INFO L168 Benchmark]: Boogie Preprocessor took 42.48 ms. Allocated memory is still 293.1 MB. Free memory was 245.9 MB in the beginning and 243.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:59,879 INFO L168 Benchmark]: RCFGBuilder took 419.84 ms. Allocated memory is still 293.1 MB. Free memory was 243.4 MB in the beginning and 221.6 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:59,879 INFO L168 Benchmark]: TraceAbstraction took 870164.55 ms. Allocated memory was 293.1 MB in the beginning and 977.3 MB in the end (delta: 684.2 MB). Free memory was 221.6 MB in the beginning and 238.9 MB in the end (delta: -17.3 MB). Peak memory consumption was 666.9 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:59,881 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 243.8 MB. Free memory is still 220.2 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 783.55 ms. Allocated memory was 243.8 MB in the beginning and 293.1 MB in the end (delta: 49.3 MB). Free memory was 198.3 MB in the beginning and 245.9 MB in the end (delta: -47.6 MB). Peak memory consumption was 30.4 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 74.95 ms. Allocated memory is still 293.1 MB. Free memory is still 245.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 42.48 ms. Allocated memory is still 293.1 MB. Free memory was 245.9 MB in the beginning and 243.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 419.84 ms. Allocated memory is still 293.1 MB. Free memory was 243.4 MB in the beginning and 221.6 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 870164.55 ms. Allocated memory was 293.1 MB in the beginning and 977.3 MB in the end (delta: 684.2 MB). Free memory was 221.6 MB in the beginning and 238.9 MB in the end (delta: -17.3 MB). Peak memory consumption was 666.9 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (25states, 45/57 universal loopers) in iteration 7,while PetriNetUnfolder was constructing finite prefix that currently has 26652 conditions, 8926 events (1337/8925 cut-off events. For 142104/142556 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 117202 event pairs, 0 based on Foata normal form. 130/8299 useless extension candidates. Maximal degree in co-relation 26496. Up to 1350 conditions per place.). - 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: 870.0s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 791.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 697 SDslu, 452 SDs, 0 SdLazy, 2690 SolverSat, 967 SolverUnsat, 67 SolverUnknown, 0 SolverNotchecked, 161.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1832 GetRequests, 1306 SyntacticMatches, 10 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16934 ImplicationChecksByTransitivity, 672.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25824occurred 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, 0.3s SatisfiabilityAnalysisTime, 74.6s InterpolantComputationTime, 725 NumberOfCodeBlocks, 725 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1420 ConstructedInterpolants, 102 QuantifiedInterpolants, 1075238 SizeOfPredicates, 60 NumberOfNonLiveVariables, 1676 ConjunctsInSsa, 184 ConjunctsInUnsatCore, 30 InterpolantComputations, 6 PerfectInterpolantSequences, 0/714 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