/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/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 02:17:04,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 02:17:04,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 02:17:04,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 02:17:04,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 02:17:04,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 02:17:04,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 02:17:04,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 02:17:04,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 02:17:04,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 02:17:04,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 02:17:04,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 02:17:04,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 02:17:04,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 02:17:04,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 02:17:04,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 02:17:04,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 02:17:04,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 02:17:04,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 02:17:04,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 02:17:04,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 02:17:04,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 02:17:04,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 02:17:04,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 02:17:04,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 02:17:04,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 02:17:04,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 02:17:04,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 02:17:04,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 02:17:04,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 02:17:04,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 02:17:04,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 02:17:04,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 02:17:04,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 02:17:04,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 02:17:04,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 02:17:04,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 02:17:04,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 02:17:04,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 02:17:04,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 02:17:04,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 02:17:04,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2020-10-16 02:17:04,279 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 02:17:04,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 02:17:04,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 02:17:04,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 02:17:04,281 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 02:17:04,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 02:17:04,281 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 02:17:04,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 02:17:04,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 02:17:04,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 02:17:04,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 02:17:04,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 02:17:04,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 02:17:04,283 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 02:17:04,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 02:17:04,283 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 02:17:04,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 02:17:04,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 02:17:04,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 02:17:04,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 02:17:04,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 02:17:04,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 02:17:04,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 02:17:04,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 02:17:04,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 02:17:04,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 02:17:04,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 02:17:04,285 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 02:17:04,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 02:17:04,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 02:17:04,583 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 02:17:04,586 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 02:17:04,587 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 02:17:04,588 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 02:17:04,588 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-16 02:17:04,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2ce9217c/ce41b210064a45869a0ba1a3d404e542/FLAGf6ce3a3a0 [2020-10-16 02:17:05,247 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 02:17:05,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-16 02:17:05,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2ce9217c/ce41b210064a45869a0ba1a3d404e542/FLAGf6ce3a3a0 [2020-10-16 02:17:05,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2ce9217c/ce41b210064a45869a0ba1a3d404e542 [2020-10-16 02:17:05,505 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 02:17:05,507 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 02:17:05,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 02:17:05,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 02:17:05,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 02:17:05,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:17:05" (1/1) ... [2020-10-16 02:17:05,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b7c5bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:05, skipping insertion in model container [2020-10-16 02:17:05,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:17:05" (1/1) ... [2020-10-16 02:17:05,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 02:17:05,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 02:17:06,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 02:17:06,411 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 02:17:06,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 02:17:06,707 INFO L208 MainTranslator]: Completed translation [2020-10-16 02:17:06,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:06 WrapperNode [2020-10-16 02:17:06,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 02:17:06,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 02:17:06,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 02:17:06,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 02:17:06,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:06" (1/1) ... [2020-10-16 02:17:06,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:06" (1/1) ... [2020-10-16 02:17:06,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 02:17:06,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 02:17:06,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 02:17:06,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 02:17:06,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:06" (1/1) ... [2020-10-16 02:17:06,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:06" (1/1) ... [2020-10-16 02:17:06,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:06" (1/1) ... [2020-10-16 02:17:06,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:06" (1/1) ... [2020-10-16 02:17:06,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:06" (1/1) ... [2020-10-16 02:17:06,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:06" (1/1) ... [2020-10-16 02:17:06,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:06" (1/1) ... [2020-10-16 02:17:06,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 02:17:06,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 02:17:06,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 02:17:06,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 02:17:06,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:06" (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 [2020-10-16 02:17:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 02:17:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 02:17:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 02:17:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 02:17:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-16 02:17:06,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-10-16 02:17:06,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-10-16 02:17:06,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-16 02:17:06,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 02:17:06,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 02:17:06,905 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 02:17:07,310 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 02:17:07,311 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-16 02:17:07,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:17:07 BoogieIcfgContainer [2020-10-16 02:17:07,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 02:17:07,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 02:17:07,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 02:17:07,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 02:17:07,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:17:05" (1/3) ... [2020-10-16 02:17:07,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c204ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:17:07, skipping insertion in model container [2020-10-16 02:17:07,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:06" (2/3) ... [2020-10-16 02:17:07,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c204ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:17:07, skipping insertion in model container [2020-10-16 02:17:07,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:17:07" (3/3) ... [2020-10-16 02:17:07,323 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-10-16 02:17:07,339 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 02:17:07,347 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 02:17:07,348 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 02:17:07,387 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,388 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,388 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,388 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,389 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,389 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,389 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,390 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,390 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,390 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,390 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,391 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,391 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,391 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,392 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,392 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,392 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,392 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,393 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,393 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,393 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,393 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,394 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,397 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,398 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,398 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,398 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,399 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,399 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,399 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,399 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,400 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:17:07,425 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:17:07,447 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:17:07,448 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:17:07,448 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:17:07,448 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:17:07,448 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:17:07,449 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:17:07,449 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:17:07,449 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:17:07,465 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-10-16 02:17:07,515 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-10-16 02:17:07,516 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 02:17:07,521 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-10-16 02:17:07,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 81 transitions, 170 flow [2020-10-16 02:17:07,529 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 73 transitions, 152 flow [2020-10-16 02:17:07,532 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:17:07,535 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 73 transitions, 152 flow [2020-10-16 02:17:07,538 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 73 transitions, 152 flow [2020-10-16 02:17:07,538 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 71 places, 73 transitions, 152 flow [2020-10-16 02:17:07,576 INFO L129 PetriNetUnfolder]: 6/73 cut-off events. [2020-10-16 02:17:07,576 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 02:17:07,577 INFO L80 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 73 events. 6/73 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-10-16 02:17:07,579 INFO L117 LiptonReduction]: Number of co-enabled transitions 646 [2020-10-16 02:17:08,731 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-16 02:17:08,894 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-16 02:17:09,411 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-16 02:17:09,577 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-16 02:17:09,859 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-16 02:17:10,071 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-16 02:17:10,605 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-10-16 02:17:10,877 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-16 02:17:10,881 INFO L132 LiptonReduction]: Checked pairs total: 870 [2020-10-16 02:17:10,881 INFO L134 LiptonReduction]: Total number of compositions: 64 [2020-10-16 02:17:10,884 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 3355 [2020-10-16 02:17:10,892 INFO L129 PetriNetUnfolder]: 2/14 cut-off events. [2020-10-16 02:17:10,892 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 02:17:10,892 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:10,893 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:10,894 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:10,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:10,900 INFO L82 PathProgramCache]: Analyzing trace with hash -514107511, now seen corresponding path program 1 times [2020-10-16 02:17:10,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:10,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353336800] [2020-10-16 02:17:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:17:11,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353336800] [2020-10-16 02:17:11,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:17:11,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:17:11,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343909106] [2020-10-16 02:17:11,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:17:11,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:11,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:17:11,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:17:11,185 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 145 [2020-10-16 02:17:11,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 36 flow. Second operand 3 states. [2020-10-16 02:17:11,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:11,188 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 145 [2020-10-16 02:17:11,189 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:11,221 INFO L129 PetriNetUnfolder]: 2/18 cut-off events. [2020-10-16 02:17:11,222 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 02:17:11,222 INFO L80 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 18 events. 2/18 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2020-10-16 02:17:11,223 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 5 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2020-10-16 02:17:11,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 17 transitions, 54 flow [2020-10-16 02:17:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:17:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:17:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 326 transitions. [2020-10-16 02:17:11,241 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7494252873563219 [2020-10-16 02:17:11,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 326 transitions. [2020-10-16 02:17:11,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 326 transitions. [2020-10-16 02:17:11,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:11,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 326 transitions. [2020-10-16 02:17:11,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:17:11,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:17:11,258 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:17:11,260 INFO L185 Difference]: Start difference. First operand has 17 places, 15 transitions, 36 flow. Second operand 3 states and 326 transitions. [2020-10-16 02:17:11,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 17 transitions, 54 flow [2020-10-16 02:17:11,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 17 transitions, 50 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 02:17:11,266 INFO L241 Difference]: Finished difference. Result has 18 places, 16 transitions, 44 flow [2020-10-16 02:17:11,268 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2020-10-16 02:17:11,269 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2020-10-16 02:17:11,270 INFO L481 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 44 flow [2020-10-16 02:17:11,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:17:11,270 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:11,270 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:11,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 02:17:11,271 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:11,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:11,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1965215909, now seen corresponding path program 1 times [2020-10-16 02:17:11,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:11,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414839411] [2020-10-16 02:17:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:17:11,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414839411] [2020-10-16 02:17:11,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015215834] [2020-10-16 02:17:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:11,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-16 02:17:11,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:17:11,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 02:17:11,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-16 02:17:11,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615489682] [2020-10-16 02:17:11,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:17:11,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:11,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:17:11,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 02:17:11,506 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 145 [2020-10-16 02:17:11,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 44 flow. Second operand 3 states. [2020-10-16 02:17:11,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:11,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 145 [2020-10-16 02:17:11,507 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:11,532 INFO L129 PetriNetUnfolder]: 2/22 cut-off events. [2020-10-16 02:17:11,535 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 02:17:11,536 INFO L80 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 22 events. 2/22 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 24. Up to 6 conditions per place. [2020-10-16 02:17:11,536 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 5 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2020-10-16 02:17:11,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 18 transitions, 62 flow [2020-10-16 02:17:11,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:17:11,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:17:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2020-10-16 02:17:11,543 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7839080459770115 [2020-10-16 02:17:11,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2020-10-16 02:17:11,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2020-10-16 02:17:11,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:11,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2020-10-16 02:17:11,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:17:11,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:17:11,550 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:17:11,551 INFO L185 Difference]: Start difference. First operand has 18 places, 16 transitions, 44 flow. Second operand 3 states and 341 transitions. [2020-10-16 02:17:11,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 18 transitions, 62 flow [2020-10-16 02:17:11,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 60 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:17:11,554 INFO L241 Difference]: Finished difference. Result has 20 places, 17 transitions, 54 flow [2020-10-16 02:17:11,555 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2020-10-16 02:17:11,555 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 3 predicate places. [2020-10-16 02:17:11,555 INFO L481 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 54 flow [2020-10-16 02:17:11,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:17:11,556 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:11,556 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:11,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-16 02:17:11,757 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:11,758 INFO L82 PathProgramCache]: Analyzing trace with hash 953914060, now seen corresponding path program 1 times [2020-10-16 02:17:11,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:11,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939620266] [2020-10-16 02:17:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:17:11,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939620266] [2020-10-16 02:17:11,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512097995] [2020-10-16 02:17:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:11,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-16 02:17:11,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:17:11,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:11,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-16 02:17:11,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085241410] [2020-10-16 02:17:11,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 02:17:11,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:11,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 02:17:11,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-16 02:17:11,928 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 145 [2020-10-16 02:17:11,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 54 flow. Second operand 5 states. [2020-10-16 02:17:11,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:11,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 145 [2020-10-16 02:17:11,929 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:11,966 INFO L129 PetriNetUnfolder]: 2/25 cut-off events. [2020-10-16 02:17:11,966 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-10-16 02:17:11,967 INFO L80 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 25 events. 2/25 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 28 event pairs, 0 based on Foata normal form. 1/26 useless extension candidates. Maximal degree in co-relation 33. Up to 6 conditions per place. [2020-10-16 02:17:11,967 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 6 selfloop transitions, 3 changer transitions 0/20 dead transitions. [2020-10-16 02:17:11,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 20 transitions, 80 flow [2020-10-16 02:17:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:17:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:17:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 434 transitions. [2020-10-16 02:17:11,971 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7482758620689656 [2020-10-16 02:17:11,971 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 434 transitions. [2020-10-16 02:17:11,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 434 transitions. [2020-10-16 02:17:11,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:11,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 434 transitions. [2020-10-16 02:17:11,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:17:11,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:17:11,976 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:17:11,976 INFO L185 Difference]: Start difference. First operand has 20 places, 17 transitions, 54 flow. Second operand 4 states and 434 transitions. [2020-10-16 02:17:11,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 20 transitions, 80 flow [2020-10-16 02:17:11,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 20 transitions, 78 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:17:11,978 INFO L241 Difference]: Finished difference. Result has 23 places, 18 transitions, 68 flow [2020-10-16 02:17:11,978 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2020-10-16 02:17:11,978 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 6 predicate places. [2020-10-16 02:17:11,978 INFO L481 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 68 flow [2020-10-16 02:17:11,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 02:17:11,979 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:11,979 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:12,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:12,194 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:12,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:12,194 INFO L82 PathProgramCache]: Analyzing trace with hash -234167760, now seen corresponding path program 2 times [2020-10-16 02:17:12,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:12,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735347592] [2020-10-16 02:17:12,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 02:17:12,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735347592] [2020-10-16 02:17:12,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657716745] [2020-10-16 02:17:12,257 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:12,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 02:17:12,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:17:12,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:17:12,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:17:12,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:12,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-10-16 02:17:12,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880739463] [2020-10-16 02:17:12,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 02:17:12,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:12,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 02:17:12,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-16 02:17:12,365 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2020-10-16 02:17:12,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 68 flow. Second operand 7 states. [2020-10-16 02:17:12,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:12,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2020-10-16 02:17:12,366 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:12,612 INFO L129 PetriNetUnfolder]: 81/214 cut-off events. [2020-10-16 02:17:12,613 INFO L130 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2020-10-16 02:17:12,615 INFO L80 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 214 events. 81/214 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 775 event pairs, 9 based on Foata normal form. 18/228 useless extension candidates. Maximal degree in co-relation 132. Up to 41 conditions per place. [2020-10-16 02:17:12,618 INFO L132 encePairwiseOnDemand]: 139/145 looper letters, 40 selfloop transitions, 24 changer transitions 0/69 dead transitions. [2020-10-16 02:17:12,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 69 transitions, 386 flow [2020-10-16 02:17:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 02:17:12,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 02:17:12,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1228 transitions. [2020-10-16 02:17:12,624 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6514588859416446 [2020-10-16 02:17:12,624 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1228 transitions. [2020-10-16 02:17:12,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1228 transitions. [2020-10-16 02:17:12,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:12,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1228 transitions. [2020-10-16 02:17:12,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 02:17:12,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 02:17:12,632 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 02:17:12,633 INFO L185 Difference]: Start difference. First operand has 23 places, 18 transitions, 68 flow. Second operand 13 states and 1228 transitions. [2020-10-16 02:17:12,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 69 transitions, 386 flow [2020-10-16 02:17:12,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 69 transitions, 368 flow, removed 3 selfloop flow, removed 2 redundant places. [2020-10-16 02:17:12,639 INFO L241 Difference]: Finished difference. Result has 39 places, 37 transitions, 248 flow [2020-10-16 02:17:12,639 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=248, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2020-10-16 02:17:12,639 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 22 predicate places. [2020-10-16 02:17:12,639 INFO L481 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 248 flow [2020-10-16 02:17:12,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 02:17:12,640 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:12,640 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:12,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:12,855 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:12,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:12,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1480357943, now seen corresponding path program 3 times [2020-10-16 02:17:12,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:12,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229878976] [2020-10-16 02:17:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-16 02:17:12,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229878976] [2020-10-16 02:17:12,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158221184] [2020-10-16 02:17:12,962 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:13,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 02:17:13,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:17:13,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:17:13,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-16 02:17:13,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:13,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 02:17:13,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791439306] [2020-10-16 02:17:13,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:17:13,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:13,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:17:13,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:17:13,073 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 145 [2020-10-16 02:17:13,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 248 flow. Second operand 6 states. [2020-10-16 02:17:13,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:13,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 145 [2020-10-16 02:17:13,074 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:13,117 INFO L129 PetriNetUnfolder]: 24/108 cut-off events. [2020-10-16 02:17:13,117 INFO L130 PetriNetUnfolder]: For 382/401 co-relation queries the response was YES. [2020-10-16 02:17:13,119 INFO L80 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 108 events. 24/108 cut-off events. For 382/401 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 299 event pairs, 4 based on Foata normal form. 9/112 useless extension candidates. Maximal degree in co-relation 191. Up to 23 conditions per place. [2020-10-16 02:17:13,120 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 7 selfloop transitions, 13 changer transitions 0/41 dead transitions. [2020-10-16 02:17:13,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 306 flow [2020-10-16 02:17:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:17:13,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:17:13,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 567 transitions. [2020-10-16 02:17:13,123 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7820689655172414 [2020-10-16 02:17:13,123 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 567 transitions. [2020-10-16 02:17:13,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 567 transitions. [2020-10-16 02:17:13,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:13,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 567 transitions. [2020-10-16 02:17:13,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:17:13,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:17:13,127 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:17:13,127 INFO L185 Difference]: Start difference. First operand has 39 places, 37 transitions, 248 flow. Second operand 5 states and 567 transitions. [2020-10-16 02:17:13,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 306 flow [2020-10-16 02:17:13,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 266 flow, removed 10 selfloop flow, removed 3 redundant places. [2020-10-16 02:17:13,133 INFO L241 Difference]: Finished difference. Result has 41 places, 38 transitions, 255 flow [2020-10-16 02:17:13,133 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2020-10-16 02:17:13,133 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 24 predicate places. [2020-10-16 02:17:13,134 INFO L481 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 255 flow [2020-10-16 02:17:13,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:17:13,134 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:13,134 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:13,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:13,348 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:13,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1416914048, now seen corresponding path program 4 times [2020-10-16 02:17:13,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:13,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091089829] [2020-10-16 02:17:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-16 02:17:13,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091089829] [2020-10-16 02:17:13,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:17:13,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:17:13,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697016297] [2020-10-16 02:17:13,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:17:13,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:13,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:17:13,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:17:13,435 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 145 [2020-10-16 02:17:13,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 255 flow. Second operand 3 states. [2020-10-16 02:17:13,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:13,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 145 [2020-10-16 02:17:13,436 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:13,483 INFO L129 PetriNetUnfolder]: 28/153 cut-off events. [2020-10-16 02:17:13,483 INFO L130 PetriNetUnfolder]: For 486/489 co-relation queries the response was YES. [2020-10-16 02:17:13,484 INFO L80 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 153 events. 28/153 cut-off events. For 486/489 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 496 event pairs, 6 based on Foata normal form. 35/184 useless extension candidates. Maximal degree in co-relation 308. Up to 43 conditions per place. [2020-10-16 02:17:13,485 INFO L132 encePairwiseOnDemand]: 141/145 looper letters, 1 selfloop transitions, 22 changer transitions 0/38 dead transitions. [2020-10-16 02:17:13,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 301 flow [2020-10-16 02:17:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:17:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:17:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2020-10-16 02:17:13,487 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7195402298850575 [2020-10-16 02:17:13,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2020-10-16 02:17:13,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2020-10-16 02:17:13,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:13,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2020-10-16 02:17:13,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:17:13,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:17:13,491 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:17:13,491 INFO L185 Difference]: Start difference. First operand has 41 places, 38 transitions, 255 flow. Second operand 3 states and 313 transitions. [2020-10-16 02:17:13,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 301 flow [2020-10-16 02:17:13,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 272 flow, removed 4 selfloop flow, removed 3 redundant places. [2020-10-16 02:17:13,495 INFO L241 Difference]: Finished difference. Result has 40 places, 38 transitions, 270 flow [2020-10-16 02:17:13,496 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2020-10-16 02:17:13,496 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 23 predicate places. [2020-10-16 02:17:13,496 INFO L481 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 270 flow [2020-10-16 02:17:13,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:17:13,496 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:13,496 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:13,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 02:17:13,497 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:13,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:13,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1479341204, now seen corresponding path program 5 times [2020-10-16 02:17:13,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:13,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378955034] [2020-10-16 02:17:13,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 02:17:13,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378955034] [2020-10-16 02:17:13,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855379948] [2020-10-16 02:17:13,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:13,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 02:17:13,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:17:13,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:17:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 02:17:13,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:13,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-16 02:17:13,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563969084] [2020-10-16 02:17:13,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 02:17:13,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:13,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 02:17:13,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-16 02:17:13,720 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2020-10-16 02:17:13,721 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 270 flow. Second operand 10 states. [2020-10-16 02:17:13,721 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:13,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2020-10-16 02:17:13,722 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:14,180 INFO L129 PetriNetUnfolder]: 70/292 cut-off events. [2020-10-16 02:17:14,180 INFO L130 PetriNetUnfolder]: For 1641/1643 co-relation queries the response was YES. [2020-10-16 02:17:14,182 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 292 events. 70/292 cut-off events. For 1641/1643 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1171 event pairs, 6 based on Foata normal form. 26/318 useless extension candidates. Maximal degree in co-relation 609. Up to 71 conditions per place. [2020-10-16 02:17:14,187 INFO L132 encePairwiseOnDemand]: 139/145 looper letters, 72 selfloop transitions, 50 changer transitions 0/127 dead transitions. [2020-10-16 02:17:14,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 127 transitions, 1190 flow [2020-10-16 02:17:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 02:17:14,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 02:17:14,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2446 transitions. [2020-10-16 02:17:14,197 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6488063660477453 [2020-10-16 02:17:14,197 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2446 transitions. [2020-10-16 02:17:14,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2446 transitions. [2020-10-16 02:17:14,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:14,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2446 transitions. [2020-10-16 02:17:14,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 02:17:14,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 02:17:14,212 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 02:17:14,213 INFO L185 Difference]: Start difference. First operand has 40 places, 38 transitions, 270 flow. Second operand 26 states and 2446 transitions. [2020-10-16 02:17:14,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 127 transitions, 1190 flow [2020-10-16 02:17:14,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 127 transitions, 1090 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:17:14,223 INFO L241 Difference]: Finished difference. Result has 73 places, 63 transitions, 662 flow [2020-10-16 02:17:14,223 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=662, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2020-10-16 02:17:14,224 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 56 predicate places. [2020-10-16 02:17:14,224 INFO L481 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 662 flow [2020-10-16 02:17:14,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 02:17:14,224 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:14,224 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:14,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-16 02:17:14,439 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:14,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:14,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1454669239, now seen corresponding path program 6 times [2020-10-16 02:17:14,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:14,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358499559] [2020-10-16 02:17:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-16 02:17:14,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358499559] [2020-10-16 02:17:14,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460108998] [2020-10-16 02:17:14,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-16 02:17:14,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 02:17:14,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:17:14,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:17:14,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-16 02:17:14,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:14,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 02:17:14,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100298607] [2020-10-16 02:17:14,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:17:14,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:14,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:17:14,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:17:14,652 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 145 [2020-10-16 02:17:14,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 662 flow. Second operand 8 states. [2020-10-16 02:17:14,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:14,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 145 [2020-10-16 02:17:14,653 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:14,732 INFO L129 PetriNetUnfolder]: 47/268 cut-off events. [2020-10-16 02:17:14,732 INFO L130 PetriNetUnfolder]: For 2082/2094 co-relation queries the response was YES. [2020-10-16 02:17:14,734 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 268 events. 47/268 cut-off events. For 2082/2094 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1070 event pairs, 10 based on Foata normal form. 8/270 useless extension candidates. Maximal degree in co-relation 782. Up to 75 conditions per place. [2020-10-16 02:17:14,736 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 9 selfloop transitions, 26 changer transitions 0/69 dead transitions. [2020-10-16 02:17:14,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 69 transitions, 770 flow [2020-10-16 02:17:14,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 02:17:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 02:17:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 758 transitions. [2020-10-16 02:17:14,739 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7467980295566502 [2020-10-16 02:17:14,740 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 758 transitions. [2020-10-16 02:17:14,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 758 transitions. [2020-10-16 02:17:14,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:14,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 758 transitions. [2020-10-16 02:17:14,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 02:17:14,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 02:17:14,745 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 02:17:14,745 INFO L185 Difference]: Start difference. First operand has 73 places, 63 transitions, 662 flow. Second operand 7 states and 758 transitions. [2020-10-16 02:17:14,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 69 transitions, 770 flow [2020-10-16 02:17:14,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 69 transitions, 576 flow, removed 57 selfloop flow, removed 13 redundant places. [2020-10-16 02:17:14,756 INFO L241 Difference]: Finished difference. Result has 67 places, 64 transitions, 553 flow [2020-10-16 02:17:14,757 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=553, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2020-10-16 02:17:14,757 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 50 predicate places. [2020-10-16 02:17:14,757 INFO L481 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 553 flow [2020-10-16 02:17:14,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:17:14,757 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:14,758 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:14,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:14,970 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:14,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:14,971 INFO L82 PathProgramCache]: Analyzing trace with hash -394465029, now seen corresponding path program 7 times [2020-10-16 02:17:14,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:14,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295803370] [2020-10-16 02:17:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-16 02:17:15,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295803370] [2020-10-16 02:17:15,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703775792] [2020-10-16 02:17:15,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:15,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:17:15,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-16 02:17:15,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:15,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-10-16 02:17:15,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352460887] [2020-10-16 02:17:15,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 02:17:15,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:15,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 02:17:15,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-16 02:17:15,249 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2020-10-16 02:17:15,251 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 553 flow. Second operand 13 states. [2020-10-16 02:17:15,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:15,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2020-10-16 02:17:15,251 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:16,051 INFO L129 PetriNetUnfolder]: 99/443 cut-off events. [2020-10-16 02:17:16,052 INFO L130 PetriNetUnfolder]: For 6192/6194 co-relation queries the response was YES. [2020-10-16 02:17:16,054 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1904 conditions, 443 events. 99/443 cut-off events. For 6192/6194 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2010 event pairs, 6 based on Foata normal form. 32/475 useless extension candidates. Maximal degree in co-relation 1108. Up to 111 conditions per place. [2020-10-16 02:17:16,057 INFO L132 encePairwiseOnDemand]: 139/145 looper letters, 112 selfloop transitions, 84 changer transitions 0/201 dead transitions. [2020-10-16 02:17:16,058 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 201 transitions, 2302 flow [2020-10-16 02:17:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 02:17:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 02:17:16,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4036 transitions. [2020-10-16 02:17:16,070 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6473135525260626 [2020-10-16 02:17:16,070 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4036 transitions. [2020-10-16 02:17:16,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4036 transitions. [2020-10-16 02:17:16,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:16,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4036 transitions. [2020-10-16 02:17:16,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 44 states. [2020-10-16 02:17:16,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 44 states. [2020-10-16 02:17:16,094 INFO L81 ComplementDD]: Finished complementDD. Result 44 states. [2020-10-16 02:17:16,094 INFO L185 Difference]: Start difference. First operand has 67 places, 64 transitions, 553 flow. Second operand 43 states and 4036 transitions. [2020-10-16 02:17:16,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 201 transitions, 2302 flow [2020-10-16 02:17:16,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 201 transitions, 2146 flow, removed 48 selfloop flow, removed 5 redundant places. [2020-10-16 02:17:16,113 INFO L241 Difference]: Finished difference. Result has 116 places, 97 transitions, 1237 flow [2020-10-16 02:17:16,113 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1237, PETRI_PLACES=116, PETRI_TRANSITIONS=97} [2020-10-16 02:17:16,113 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 99 predicate places. [2020-10-16 02:17:16,114 INFO L481 AbstractCegarLoop]: Abstraction has has 116 places, 97 transitions, 1237 flow [2020-10-16 02:17:16,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 02:17:16,114 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:16,114 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:16,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:16,328 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:16,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:16,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1588489218, now seen corresponding path program 8 times [2020-10-16 02:17:16,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:16,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334475709] [2020-10-16 02:17:16,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-16 02:17:16,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334475709] [2020-10-16 02:17:16,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169061220] [2020-10-16 02:17:16,422 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:16,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 02:17:16,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:17:16,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 02:17:16,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-16 02:17:16,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:16,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 02:17:16,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348084111] [2020-10-16 02:17:16,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 02:17:16,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:16,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 02:17:16,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-16 02:17:16,531 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 145 [2020-10-16 02:17:16,532 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 97 transitions, 1237 flow. Second operand 10 states. [2020-10-16 02:17:16,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:16,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 145 [2020-10-16 02:17:16,532 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:16,664 INFO L129 PetriNetUnfolder]: 71/412 cut-off events. [2020-10-16 02:17:16,665 INFO L130 PetriNetUnfolder]: For 6969/6992 co-relation queries the response was YES. [2020-10-16 02:17:16,668 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1866 conditions, 412 events. 71/412 cut-off events. For 6969/6992 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1879 event pairs, 14 based on Foata normal form. 9/412 useless extension candidates. Maximal degree in co-relation 1405. Up to 117 conditions per place. [2020-10-16 02:17:16,671 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 11 selfloop transitions, 43 changer transitions 0/105 dead transitions. [2020-10-16 02:17:16,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 105 transitions, 1403 flow [2020-10-16 02:17:16,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 02:17:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-16 02:17:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 974 transitions. [2020-10-16 02:17:16,674 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.746360153256705 [2020-10-16 02:17:16,674 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 974 transitions. [2020-10-16 02:17:16,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 974 transitions. [2020-10-16 02:17:16,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:16,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 974 transitions. [2020-10-16 02:17:16,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-16 02:17:16,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-16 02:17:16,679 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-16 02:17:16,679 INFO L185 Difference]: Start difference. First operand has 116 places, 97 transitions, 1237 flow. Second operand 9 states and 974 transitions. [2020-10-16 02:17:16,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 105 transitions, 1403 flow [2020-10-16 02:17:16,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 105 transitions, 953 flow, removed 154 selfloop flow, removed 26 redundant places. [2020-10-16 02:17:16,704 INFO L241 Difference]: Finished difference. Result has 99 places, 98 transitions, 921 flow [2020-10-16 02:17:16,705 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=921, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2020-10-16 02:17:16,705 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 82 predicate places. [2020-10-16 02:17:16,705 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 921 flow [2020-10-16 02:17:16,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 02:17:16,705 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:16,705 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:16,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 02:17:16,920 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:16,920 INFO L82 PathProgramCache]: Analyzing trace with hash -929475678, now seen corresponding path program 9 times [2020-10-16 02:17:16,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:16,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778042216] [2020-10-16 02:17:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-16 02:17:17,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778042216] [2020-10-16 02:17:17,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050628368] [2020-10-16 02:17:17,048 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 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 [2020-10-16 02:17:17,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 02:17:17,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:17:17,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 02:17:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-16 02:17:17,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:17,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 02:17:17,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470232244] [2020-10-16 02:17:17,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 02:17:17,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:17,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 02:17:17,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-16 02:17:17,268 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 145 [2020-10-16 02:17:17,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 921 flow. Second operand 9 states. [2020-10-16 02:17:17,269 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:17,269 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 145 [2020-10-16 02:17:17,270 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:17,394 INFO L129 PetriNetUnfolder]: 80/472 cut-off events. [2020-10-16 02:17:17,395 INFO L130 PetriNetUnfolder]: For 8034/8064 co-relation queries the response was YES. [2020-10-16 02:17:17,399 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2027 conditions, 472 events. 80/472 cut-off events. For 8034/8064 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2236 event pairs, 22 based on Foata normal form. 13/475 useless extension candidates. Maximal degree in co-relation 1286. Up to 134 conditions per place. [2020-10-16 02:17:17,403 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 10 selfloop transitions, 43 changer transitions 0/105 dead transitions. [2020-10-16 02:17:17,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 105 transitions, 1084 flow [2020-10-16 02:17:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 02:17:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 02:17:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 906 transitions. [2020-10-16 02:17:17,405 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7810344827586206 [2020-10-16 02:17:17,405 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 906 transitions. [2020-10-16 02:17:17,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 906 transitions. [2020-10-16 02:17:17,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:17,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 906 transitions. [2020-10-16 02:17:17,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 02:17:17,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 02:17:17,409 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 02:17:17,410 INFO L185 Difference]: Start difference. First operand has 99 places, 98 transitions, 921 flow. Second operand 8 states and 906 transitions. [2020-10-16 02:17:17,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 105 transitions, 1084 flow [2020-10-16 02:17:17,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 105 transitions, 977 flow, removed 14 selfloop flow, removed 7 redundant places. [2020-10-16 02:17:17,438 INFO L241 Difference]: Finished difference. Result has 100 places, 99 transitions, 951 flow [2020-10-16 02:17:17,439 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=951, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2020-10-16 02:17:17,439 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 83 predicate places. [2020-10-16 02:17:17,439 INFO L481 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 951 flow [2020-10-16 02:17:17,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 02:17:17,440 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:17,440 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:17,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:17,655 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:17,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:17,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1790389953, now seen corresponding path program 10 times [2020-10-16 02:17:17,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:17,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9174178] [2020-10-16 02:17:17,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-16 02:17:17,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9174178] [2020-10-16 02:17:17,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876767153] [2020-10-16 02:17:17,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:17,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 02:17:17,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:17:17,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 02:17:17,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 70 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-16 02:17:17,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:17,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-10-16 02:17:17,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584592898] [2020-10-16 02:17:17,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 02:17:17,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:17,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 02:17:17,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-16 02:17:18,012 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2020-10-16 02:17:18,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 951 flow. Second operand 17 states. [2020-10-16 02:17:18,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:18,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2020-10-16 02:17:18,013 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:19,488 INFO L129 PetriNetUnfolder]: 145/697 cut-off events. [2020-10-16 02:17:19,488 INFO L130 PetriNetUnfolder]: For 21542/21544 co-relation queries the response was YES. [2020-10-16 02:17:19,492 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3519 conditions, 697 events. 145/697 cut-off events. For 21542/21544 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3510 event pairs, 6 based on Foata normal form. 40/737 useless extension candidates. Maximal degree in co-relation 2264. Up to 179 conditions per place. [2020-10-16 02:17:19,498 INFO L132 encePairwiseOnDemand]: 139/145 looper letters, 180 selfloop transitions, 144 changer transitions 0/329 dead transitions. [2020-10-16 02:17:19,498 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 329 transitions, 4542 flow [2020-10-16 02:17:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-16 02:17:19,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 02:17:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6838 transitions. [2020-10-16 02:17:19,514 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.646008502598016 [2020-10-16 02:17:19,515 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6838 transitions. [2020-10-16 02:17:19,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6838 transitions. [2020-10-16 02:17:19,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:19,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6838 transitions. [2020-10-16 02:17:19,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 74 states. [2020-10-16 02:17:19,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 74 states. [2020-10-16 02:17:19,548 INFO L81 ComplementDD]: Finished complementDD. Result 74 states. [2020-10-16 02:17:19,548 INFO L185 Difference]: Start difference. First operand has 100 places, 99 transitions, 951 flow. Second operand 73 states and 6838 transitions. [2020-10-16 02:17:19,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 329 transitions, 4542 flow [2020-10-16 02:17:19,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 329 transitions, 4164 flow, removed 135 selfloop flow, removed 6 redundant places. [2020-10-16 02:17:19,591 INFO L241 Difference]: Finished difference. Result has 182 places, 157 transitions, 2323 flow [2020-10-16 02:17:19,592 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=2323, PETRI_PLACES=182, PETRI_TRANSITIONS=157} [2020-10-16 02:17:19,592 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 165 predicate places. [2020-10-16 02:17:19,592 INFO L481 AbstractCegarLoop]: Abstraction has has 182 places, 157 transitions, 2323 flow [2020-10-16 02:17:19,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 02:17:19,593 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:19,593 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:19,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:19,808 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:19,809 INFO L82 PathProgramCache]: Analyzing trace with hash -336677004, now seen corresponding path program 11 times [2020-10-16 02:17:19,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:19,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820069281] [2020-10-16 02:17:19,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 7 proven. 92 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-16 02:17:19,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820069281] [2020-10-16 02:17:19,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450167649] [2020-10-16 02:17:19,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:20,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 02:17:20,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:17:20,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 02:17:20,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 8 proven. 91 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-16 02:17:20,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:20,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2020-10-16 02:17:20,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962715090] [2020-10-16 02:17:20,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 02:17:20,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:20,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 02:17:20,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-10-16 02:17:20,174 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2020-10-16 02:17:20,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 157 transitions, 2323 flow. Second operand 19 states. [2020-10-16 02:17:20,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:20,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2020-10-16 02:17:20,175 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:22,375 INFO L129 PetriNetUnfolder]: 171/845 cut-off events. [2020-10-16 02:17:22,375 INFO L130 PetriNetUnfolder]: For 47908/47910 co-relation queries the response was YES. [2020-10-16 02:17:22,379 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5194 conditions, 845 events. 171/845 cut-off events. For 47908/47910 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4431 event pairs, 6 based on Foata normal form. 44/889 useless extension candidates. Maximal degree in co-relation 3411. Up to 219 conditions per place. [2020-10-16 02:17:22,387 INFO L132 encePairwiseOnDemand]: 139/145 looper letters, 220 selfloop transitions, 180 changer transitions 0/405 dead transitions. [2020-10-16 02:17:22,387 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 405 transitions, 6914 flow [2020-10-16 02:17:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-16 02:17:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 02:17:22,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 8518 transitions. [2020-10-16 02:17:22,399 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6455475558923834 [2020-10-16 02:17:22,399 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 8518 transitions. [2020-10-16 02:17:22,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 8518 transitions. [2020-10-16 02:17:22,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:22,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 8518 transitions. [2020-10-16 02:17:22,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 92 states. [2020-10-16 02:17:22,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 92 states. [2020-10-16 02:17:22,427 INFO L81 ComplementDD]: Finished complementDD. Result 92 states. [2020-10-16 02:17:22,427 INFO L185 Difference]: Start difference. First operand has 182 places, 157 transitions, 2323 flow. Second operand 91 states and 8518 transitions. [2020-10-16 02:17:22,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 405 transitions, 6914 flow [2020-10-16 02:17:22,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 405 transitions, 5824 flow, removed 403 selfloop flow, removed 44 redundant places. [2020-10-16 02:17:22,505 INFO L241 Difference]: Finished difference. Result has 246 places, 193 transitions, 3073 flow [2020-10-16 02:17:22,506 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=3073, PETRI_PLACES=246, PETRI_TRANSITIONS=193} [2020-10-16 02:17:22,506 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 229 predicate places. [2020-10-16 02:17:22,506 INFO L481 AbstractCegarLoop]: Abstraction has has 246 places, 193 transitions, 3073 flow [2020-10-16 02:17:22,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 02:17:22,507 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:22,507 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:22,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 02:17:22,722 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:22,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:22,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1046319543, now seen corresponding path program 12 times [2020-10-16 02:17:22,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:22,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287352353] [2020-10-16 02:17:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 8 proven. 117 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-16 02:17:22,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287352353] [2020-10-16 02:17:22,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5204377] [2020-10-16 02:17:22,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-16 02:17:23,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 02:17:23,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:17:23,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 02:17:23,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 9 proven. 120 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-16 02:17:23,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:23,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-10-16 02:17:23,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66835221] [2020-10-16 02:17:23,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 02:17:23,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:23,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 02:17:23,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2020-10-16 02:17:23,244 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2020-10-16 02:17:23,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 193 transitions, 3073 flow. Second operand 21 states. [2020-10-16 02:17:23,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:23,245 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2020-10-16 02:17:23,245 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:26,267 INFO L129 PetriNetUnfolder]: 199/1006 cut-off events. [2020-10-16 02:17:26,267 INFO L130 PetriNetUnfolder]: For 95652/95654 co-relation queries the response was YES. [2020-10-16 02:17:26,274 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7020 conditions, 1006 events. 199/1006 cut-off events. For 95652/95654 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 5499 event pairs, 6 based on Foata normal form. 48/1054 useless extension candidates. Maximal degree in co-relation 4568. Up to 263 conditions per place. [2020-10-16 02:17:26,284 INFO L132 encePairwiseOnDemand]: 139/145 looper letters, 264 selfloop transitions, 220 changer transitions 0/489 dead transitions. [2020-10-16 02:17:26,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 489 transitions, 9480 flow [2020-10-16 02:17:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-10-16 02:17:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-16 02:17:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 10384 transitions. [2020-10-16 02:17:26,296 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6451693072382727 [2020-10-16 02:17:26,297 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 10384 transitions. [2020-10-16 02:17:26,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 10384 transitions. [2020-10-16 02:17:26,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:26,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 10384 transitions. [2020-10-16 02:17:26,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 112 states. [2020-10-16 02:17:26,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 112 states. [2020-10-16 02:17:26,326 INFO L81 ComplementDD]: Finished complementDD. Result 112 states. [2020-10-16 02:17:26,326 INFO L185 Difference]: Start difference. First operand has 246 places, 193 transitions, 3073 flow. Second operand 111 states and 10384 transitions. [2020-10-16 02:17:26,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 489 transitions, 9480 flow [2020-10-16 02:17:26,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 489 transitions, 7978 flow, removed 573 selfloop flow, removed 72 redundant places. [2020-10-16 02:17:26,434 INFO L241 Difference]: Finished difference. Result has 304 places, 233 transitions, 4085 flow [2020-10-16 02:17:26,435 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=4085, PETRI_PLACES=304, PETRI_TRANSITIONS=233} [2020-10-16 02:17:26,435 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 287 predicate places. [2020-10-16 02:17:26,435 INFO L481 AbstractCegarLoop]: Abstraction has has 304 places, 233 transitions, 4085 flow [2020-10-16 02:17:26,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 02:17:26,435 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:26,435 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:26,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-16 02:17:26,636 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:26,637 INFO L82 PathProgramCache]: Analyzing trace with hash 980365370, now seen corresponding path program 13 times [2020-10-16 02:17:26,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:26,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289419233] [2020-10-16 02:17:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-16 02:17:26,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289419233] [2020-10-16 02:17:26,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507276130] [2020-10-16 02:17:26,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:26,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 02:17:26,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-16 02:17:26,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:26,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 02:17:26,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007146722] [2020-10-16 02:17:26,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 02:17:26,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:26,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 02:17:26,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-16 02:17:26,926 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 145 [2020-10-16 02:17:26,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 233 transitions, 4085 flow. Second operand 13 states. [2020-10-16 02:17:26,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:26,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 145 [2020-10-16 02:17:26,927 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:27,253 INFO L129 PetriNetUnfolder]: 160/977 cut-off events. [2020-10-16 02:17:27,253 INFO L130 PetriNetUnfolder]: For 79908/79992 co-relation queries the response was YES. [2020-10-16 02:17:27,267 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6298 conditions, 977 events. 160/977 cut-off events. For 79908/79992 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 5423 event pairs, 27 based on Foata normal form. 13/973 useless extension candidates. Maximal degree in co-relation 4772. Up to 279 conditions per place. [2020-10-16 02:17:27,277 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 14 selfloop transitions, 111 changer transitions 0/244 dead transitions. [2020-10-16 02:17:27,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 244 transitions, 4466 flow [2020-10-16 02:17:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 02:17:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 02:17:27,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1358 transitions. [2020-10-16 02:17:27,281 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7804597701149425 [2020-10-16 02:17:27,282 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1358 transitions. [2020-10-16 02:17:27,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1358 transitions. [2020-10-16 02:17:27,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:27,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1358 transitions. [2020-10-16 02:17:27,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 02:17:27,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 02:17:27,292 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 02:17:27,292 INFO L185 Difference]: Start difference. First operand has 304 places, 233 transitions, 4085 flow. Second operand 12 states and 1358 transitions. [2020-10-16 02:17:27,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 244 transitions, 4466 flow [2020-10-16 02:17:27,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 244 transitions, 2494 flow, removed 787 selfloop flow, removed 90 redundant places. [2020-10-16 02:17:27,672 INFO L241 Difference]: Finished difference. Result has 226 places, 234 transitions, 2452 flow [2020-10-16 02:17:27,673 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2113, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2452, PETRI_PLACES=226, PETRI_TRANSITIONS=234} [2020-10-16 02:17:27,674 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 209 predicate places. [2020-10-16 02:17:27,674 INFO L481 AbstractCegarLoop]: Abstraction has has 226 places, 234 transitions, 2452 flow [2020-10-16 02:17:27,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 02:17:27,674 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:27,674 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:27,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 02:17:27,887 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:27,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:27,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1673611679, now seen corresponding path program 14 times [2020-10-16 02:17:27,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:27,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482636334] [2020-10-16 02:17:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-16 02:17:28,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482636334] [2020-10-16 02:17:28,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820126222] [2020-10-16 02:17:28,054 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:28,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 02:17:28,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:17:28,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 02:17:28,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-16 02:17:28,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:28,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 02:17:28,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574363630] [2020-10-16 02:17:28,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 02:17:28,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:28,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 02:17:28,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-16 02:17:28,200 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 145 [2020-10-16 02:17:28,201 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 234 transitions, 2452 flow. Second operand 14 states. [2020-10-16 02:17:28,201 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:28,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 145 [2020-10-16 02:17:28,202 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:28,642 INFO L129 PetriNetUnfolder]: 172/1056 cut-off events. [2020-10-16 02:17:28,642 INFO L130 PetriNetUnfolder]: For 80360/80459 co-relation queries the response was YES. [2020-10-16 02:17:28,653 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6143 conditions, 1056 events. 172/1056 cut-off events. For 80360/80459 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 5990 event pairs, 38 based on Foata normal form. 17/1055 useless extension candidates. Maximal degree in co-relation 3791. Up to 302 conditions per place. [2020-10-16 02:17:28,660 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 15 selfloop transitions, 111 changer transitions 0/246 dead transitions. [2020-10-16 02:17:28,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 246 transitions, 2830 flow [2020-10-16 02:17:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 02:17:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 02:17:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1406 transitions. [2020-10-16 02:17:28,663 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7458885941644562 [2020-10-16 02:17:28,663 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1406 transitions. [2020-10-16 02:17:28,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1406 transitions. [2020-10-16 02:17:28,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:28,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1406 transitions. [2020-10-16 02:17:28,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 02:17:28,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 02:17:28,667 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 02:17:28,667 INFO L185 Difference]: Start difference. First operand has 226 places, 234 transitions, 2452 flow. Second operand 13 states and 1406 transitions. [2020-10-16 02:17:28,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 246 transitions, 2830 flow [2020-10-16 02:17:28,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 246 transitions, 2534 flow, removed 43 selfloop flow, removed 10 redundant places. [2020-10-16 02:17:28,860 INFO L241 Difference]: Finished difference. Result has 229 places, 235 transitions, 2486 flow [2020-10-16 02:17:28,860 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2486, PETRI_PLACES=229, PETRI_TRANSITIONS=235} [2020-10-16 02:17:28,860 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 212 predicate places. [2020-10-16 02:17:28,861 INFO L481 AbstractCegarLoop]: Abstraction has has 229 places, 235 transitions, 2486 flow [2020-10-16 02:17:28,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 02:17:28,861 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:28,861 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:29,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:29,076 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2021974501, now seen corresponding path program 15 times [2020-10-16 02:17:29,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:29,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132556726] [2020-10-16 02:17:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 10 proven. 176 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-16 02:17:29,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132556726] [2020-10-16 02:17:29,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772615806] [2020-10-16 02:17:29,227 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 [2020-10-16 02:17:29,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 02:17:29,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:17:29,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 02:17:29,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 40 proven. 190 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-16 02:17:29,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:29,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2020-10-16 02:17:29,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460323755] [2020-10-16 02:17:29,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 02:17:29,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:29,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 02:17:29,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-10-16 02:17:29,625 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2020-10-16 02:17:29,627 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 235 transitions, 2486 flow. Second operand 25 states. [2020-10-16 02:17:29,627 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:29,627 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2020-10-16 02:17:29,627 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:35,060 INFO L129 PetriNetUnfolder]: 261/1373 cut-off events. [2020-10-16 02:17:35,060 INFO L130 PetriNetUnfolder]: For 189006/189008 co-relation queries the response was YES. [2020-10-16 02:17:35,074 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9879 conditions, 1373 events. 261/1373 cut-off events. For 189006/189008 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 8050 event pairs, 6 based on Foata normal form. 56/1429 useless extension candidates. Maximal degree in co-relation 5918. Up to 363 conditions per place. [2020-10-16 02:17:35,088 INFO L132 encePairwiseOnDemand]: 139/145 looper letters, 364 selfloop transitions, 312 changer transitions 0/681 dead transitions. [2020-10-16 02:17:35,088 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 681 transitions, 13534 flow [2020-10-16 02:17:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-10-16 02:17:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-16 02:17:35,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 14674 transitions. [2020-10-16 02:17:35,104 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6445859872611465 [2020-10-16 02:17:35,104 INFO L72 ComplementDD]: Start complementDD. Operand 157 states and 14674 transitions. [2020-10-16 02:17:35,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 157 states and 14674 transitions. [2020-10-16 02:17:35,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:35,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 157 states and 14674 transitions. [2020-10-16 02:17:35,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 158 states. [2020-10-16 02:17:35,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 158 states. [2020-10-16 02:17:35,141 INFO L81 ComplementDD]: Finished complementDD. Result 158 states. [2020-10-16 02:17:35,141 INFO L185 Difference]: Start difference. First operand has 229 places, 235 transitions, 2486 flow. Second operand 157 states and 14674 transitions. [2020-10-16 02:17:35,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 681 transitions, 13534 flow [2020-10-16 02:17:35,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 681 transitions, 12334 flow, removed 468 selfloop flow, removed 11 redundant places. [2020-10-16 02:17:35,348 INFO L241 Difference]: Finished difference. Result has 398 places, 325 transitions, 6333 flow [2020-10-16 02:17:35,348 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=157, PETRI_FLOW=6333, PETRI_PLACES=398, PETRI_TRANSITIONS=325} [2020-10-16 02:17:35,348 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 381 predicate places. [2020-10-16 02:17:35,349 INFO L481 AbstractCegarLoop]: Abstraction has has 398 places, 325 transitions, 6333 flow [2020-10-16 02:17:35,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 02:17:35,349 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:35,349 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:35,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 02:17:35,563 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:35,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2003077032, now seen corresponding path program 16 times [2020-10-16 02:17:35,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:35,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590986275] [2020-10-16 02:17:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 11 proven. 210 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-16 02:17:35,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590986275] [2020-10-16 02:17:35,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9166811] [2020-10-16 02:17:35,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:36,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 02:17:36,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:17:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 02:17:36,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 11 proven. 210 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-16 02:17:36,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:36,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 02:17:36,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434664441] [2020-10-16 02:17:36,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 02:17:36,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:36,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 02:17:36,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-16 02:17:36,189 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 145 [2020-10-16 02:17:36,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 325 transitions, 6333 flow. Second operand 16 states. [2020-10-16 02:17:36,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:36,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 145 [2020-10-16 02:17:36,191 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:36,609 INFO L129 PetriNetUnfolder]: 215/1331 cut-off events. [2020-10-16 02:17:36,609 INFO L130 PetriNetUnfolder]: For 152660/152792 co-relation queries the response was YES. [2020-10-16 02:17:36,630 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9168 conditions, 1331 events. 215/1331 cut-off events. For 152660/152792 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 7927 event pairs, 32 based on Foata normal form. 15/1325 useless extension candidates. Maximal degree in co-relation 6915. Up to 381 conditions per place. [2020-10-16 02:17:36,643 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 17 selfloop transitions, 157 changer transitions 0/339 dead transitions. [2020-10-16 02:17:36,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 339 transitions, 6839 flow [2020-10-16 02:17:36,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 02:17:36,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-16 02:17:36,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1622 transitions. [2020-10-16 02:17:36,647 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7457471264367816 [2020-10-16 02:17:36,647 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1622 transitions. [2020-10-16 02:17:36,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1622 transitions. [2020-10-16 02:17:36,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:36,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1622 transitions. [2020-10-16 02:17:36,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-16 02:17:36,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-16 02:17:36,651 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-16 02:17:36,651 INFO L185 Difference]: Start difference. First operand has 398 places, 325 transitions, 6333 flow. Second operand 15 states and 1622 transitions. [2020-10-16 02:17:36,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 339 transitions, 6839 flow [2020-10-16 02:17:37,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 339 transitions, 3453 flow, removed 1406 selfloop flow, removed 112 redundant places. [2020-10-16 02:17:37,211 INFO L241 Difference]: Finished difference. Result has 301 places, 326 transitions, 3397 flow [2020-10-16 02:17:37,212 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3397, PETRI_PLACES=301, PETRI_TRANSITIONS=326} [2020-10-16 02:17:37,212 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 284 predicate places. [2020-10-16 02:17:37,212 INFO L481 AbstractCegarLoop]: Abstraction has has 301 places, 326 transitions, 3397 flow [2020-10-16 02:17:37,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 02:17:37,212 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:37,212 INFO L255 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:37,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 02:17:37,413 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:37,414 INFO L82 PathProgramCache]: Analyzing trace with hash 44567692, now seen corresponding path program 17 times [2020-10-16 02:17:37,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:37,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491073524] [2020-10-16 02:17:37,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 11 proven. 247 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-16 02:17:37,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491073524] [2020-10-16 02:17:37,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335452372] [2020-10-16 02:17:37,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:37,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-16 02:17:37,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:17:37,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 02:17:37,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 48 proven. 231 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2020-10-16 02:17:38,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:38,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2020-10-16 02:17:38,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144236218] [2020-10-16 02:17:38,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 02:17:38,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:38,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 02:17:38,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2020-10-16 02:17:38,240 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2020-10-16 02:17:38,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 326 transitions, 3397 flow. Second operand 28 states. [2020-10-16 02:17:38,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:38,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2020-10-16 02:17:38,244 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:46,666 INFO L129 PetriNetUnfolder]: 312/1677 cut-off events. [2020-10-16 02:17:46,666 INFO L130 PetriNetUnfolder]: For 338133/338135 co-relation queries the response was YES. [2020-10-16 02:17:46,680 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13135 conditions, 1677 events. 312/1677 cut-off events. For 338133/338135 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 10232 event pairs, 6 based on Foata normal form. 62/1739 useless extension candidates. Maximal degree in co-relation 7547. Up to 447 conditions per place. [2020-10-16 02:17:46,689 INFO L132 encePairwiseOnDemand]: 139/145 looper letters, 448 selfloop transitions, 390 changer transitions 0/843 dead transitions. [2020-10-16 02:17:46,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 843 transitions, 18164 flow [2020-10-16 02:17:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2020-10-16 02:17:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-16 02:17:46,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 18310 transitions. [2020-10-16 02:17:46,707 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6442646023926812 [2020-10-16 02:17:46,707 INFO L72 ComplementDD]: Start complementDD. Operand 196 states and 18310 transitions. [2020-10-16 02:17:46,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 196 states and 18310 transitions. [2020-10-16 02:17:46,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:46,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 196 states and 18310 transitions. [2020-10-16 02:17:46,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 197 states. [2020-10-16 02:17:46,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 197 states. [2020-10-16 02:17:46,744 INFO L81 ComplementDD]: Finished complementDD. Result 197 states. [2020-10-16 02:17:46,745 INFO L185 Difference]: Start difference. First operand has 301 places, 326 transitions, 3397 flow. Second operand 196 states and 18310 transitions. [2020-10-16 02:17:46,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 843 transitions, 18164 flow [2020-10-16 02:17:47,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 843 transitions, 16500 flow, removed 663 selfloop flow, removed 13 redundant places. [2020-10-16 02:17:47,139 INFO L241 Difference]: Finished difference. Result has 510 places, 403 transitions, 8170 flow [2020-10-16 02:17:47,139 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2994, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=196, PETRI_FLOW=8170, PETRI_PLACES=510, PETRI_TRANSITIONS=403} [2020-10-16 02:17:47,139 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 493 predicate places. [2020-10-16 02:17:47,140 INFO L481 AbstractCegarLoop]: Abstraction has has 510 places, 403 transitions, 8170 flow [2020-10-16 02:17:47,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 02:17:47,140 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:47,140 INFO L255 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:17:47,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:47,341 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:17:47,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:17:47,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2076028241, now seen corresponding path program 18 times [2020-10-16 02:17:47,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:17:47,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529750540] [2020-10-16 02:17:47,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:17:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:17:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-16 02:17:47,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529750540] [2020-10-16 02:17:47,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798926071] [2020-10-16 02:17:47,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:17:48,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-10-16 02:17:48,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:17:48,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 02:17:48,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:17:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 12 proven. 287 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-10-16 02:17:48,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:17:48,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2020-10-16 02:17:48,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7880969] [2020-10-16 02:17:48,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-16 02:17:48,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:17:48,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-16 02:17:48,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-16 02:17:48,449 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2020-10-16 02:17:48,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 403 transitions, 8170 flow. Second operand 30 states. [2020-10-16 02:17:48,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:17:48,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2020-10-16 02:17:48,451 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:17:50,097 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-10-16 02:17:59,140 INFO L129 PetriNetUnfolder]: 349/1902 cut-off events. [2020-10-16 02:17:59,140 INFO L130 PetriNetUnfolder]: For 561843/561845 co-relation queries the response was YES. [2020-10-16 02:17:59,156 INFO L80 FinitePrefix]: Finished finitePrefix Result has 17718 conditions, 1902 events. 349/1902 cut-off events. For 561843/561845 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 11912 event pairs, 6 based on Foata normal form. 66/1968 useless extension candidates. Maximal degree in co-relation 11775. Up to 509 conditions per place. [2020-10-16 02:17:59,169 INFO L132 encePairwiseOnDemand]: 139/145 looper letters, 510 selfloop transitions, 448 changer transitions 0/963 dead transitions. [2020-10-16 02:17:59,169 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 734 places, 963 transitions, 25216 flow [2020-10-16 02:17:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2020-10-16 02:17:59,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-16 02:17:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 21013 transitions. [2020-10-16 02:17:59,191 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6440766283524905 [2020-10-16 02:17:59,192 INFO L72 ComplementDD]: Start complementDD. Operand 225 states and 21013 transitions. [2020-10-16 02:17:59,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 225 states and 21013 transitions. [2020-10-16 02:17:59,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:17:59,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 225 states and 21013 transitions. [2020-10-16 02:17:59,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 226 states. [2020-10-16 02:17:59,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 226 states. [2020-10-16 02:17:59,233 INFO L81 ComplementDD]: Finished complementDD. Result 226 states. [2020-10-16 02:17:59,234 INFO L185 Difference]: Start difference. First operand has 510 places, 403 transitions, 8170 flow. Second operand 225 states and 21013 transitions. [2020-10-16 02:17:59,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 734 places, 963 transitions, 25216 flow [2020-10-16 02:17:59,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 963 transitions, 20472 flow, removed 1984 selfloop flow, removed 157 redundant places. [2020-10-16 02:17:59,946 INFO L241 Difference]: Finished difference. Result has 606 places, 461 transitions, 9786 flow [2020-10-16 02:17:59,947 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3694, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=225, PETRI_FLOW=9786, PETRI_PLACES=606, PETRI_TRANSITIONS=461} [2020-10-16 02:17:59,947 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 589 predicate places. [2020-10-16 02:17:59,947 INFO L481 AbstractCegarLoop]: Abstraction has has 606 places, 461 transitions, 9786 flow [2020-10-16 02:17:59,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-16 02:17:59,947 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:17:59,948 INFO L255 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:18:00,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:18:00,162 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:18:00,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:18:00,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1225147982, now seen corresponding path program 19 times [2020-10-16 02:18:00,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:18:00,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048081331] [2020-10-16 02:18:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:18:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:18:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-16 02:18:00,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048081331] [2020-10-16 02:18:00,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528010063] [2020-10-16 02:18:00,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:18:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:18:00,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 02:18:00,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:18:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-16 02:18:00,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:18:00,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 02:18:00,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344633628] [2020-10-16 02:18:00,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 02:18:00,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:18:00,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 02:18:00,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-16 02:18:00,486 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 145 [2020-10-16 02:18:00,487 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 461 transitions, 9786 flow. Second operand 17 states. [2020-10-16 02:18:00,487 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:18:00,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 145 [2020-10-16 02:18:00,488 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:18:01,350 INFO L129 PetriNetUnfolder]: 297/1868 cut-off events. [2020-10-16 02:18:01,350 INFO L130 PetriNetUnfolder]: For 418657/418863 co-relation queries the response was YES. [2020-10-16 02:18:01,369 INFO L80 FinitePrefix]: Finished finitePrefix Result has 15150 conditions, 1868 events. 297/1868 cut-off events. For 418657/418863 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 11942 event pairs, 41 based on Foata normal form. 18/1860 useless extension candidates. Maximal degree in co-relation 11596. Up to 535 conditions per place. [2020-10-16 02:18:01,378 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 18 selfloop transitions, 225 changer transitions 0/476 dead transitions. [2020-10-16 02:18:01,379 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 476 transitions, 10505 flow [2020-10-16 02:18:01,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 02:18:01,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 02:18:01,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1810 transitions. [2020-10-16 02:18:01,381 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7801724137931034 [2020-10-16 02:18:01,381 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1810 transitions. [2020-10-16 02:18:01,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1810 transitions. [2020-10-16 02:18:01,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:18:01,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1810 transitions. [2020-10-16 02:18:01,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 02:18:01,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 02:18:01,385 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 02:18:01,385 INFO L185 Difference]: Start difference. First operand has 606 places, 461 transitions, 9786 flow. Second operand 16 states and 1810 transitions. [2020-10-16 02:18:01,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 476 transitions, 10505 flow [2020-10-16 02:18:02,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 476 transitions, 5021 flow, removed 2324 selfloop flow, removed 195 redundant places. [2020-10-16 02:18:02,588 INFO L241 Difference]: Finished difference. Result has 427 places, 462 transitions, 4964 flow [2020-10-16 02:18:02,589 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4302, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4964, PETRI_PLACES=427, PETRI_TRANSITIONS=462} [2020-10-16 02:18:02,589 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 410 predicate places. [2020-10-16 02:18:02,589 INFO L481 AbstractCegarLoop]: Abstraction has has 427 places, 462 transitions, 4964 flow [2020-10-16 02:18:02,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 02:18:02,589 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:18:02,590 INFO L255 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:18:02,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:18:02,796 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:18:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:18:02,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1424385695, now seen corresponding path program 20 times [2020-10-16 02:18:02,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:18:02,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437699270] [2020-10-16 02:18:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:18:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:18:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 14 proven. 330 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-10-16 02:18:03,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437699270] [2020-10-16 02:18:03,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432158160] [2020-10-16 02:18:03,024 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:18:03,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 02:18:03,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:18:03,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 02:18:03,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:18:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 14 proven. 330 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-10-16 02:18:03,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:18:03,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 02:18:03,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702859869] [2020-10-16 02:18:03,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 02:18:03,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:18:03,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 02:18:03,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-16 02:18:03,170 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 145 [2020-10-16 02:18:03,172 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 462 transitions, 4964 flow. Second operand 19 states. [2020-10-16 02:18:03,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:18:03,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 145 [2020-10-16 02:18:03,172 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:18:03,762 INFO L129 PetriNetUnfolder]: 313/1975 cut-off events. [2020-10-16 02:18:03,762 INFO L130 PetriNetUnfolder]: For 399809/400036 co-relation queries the response was YES. [2020-10-16 02:18:03,788 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14229 conditions, 1975 events. 313/1975 cut-off events. For 399809/400036 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 12778 event pairs, 56 based on Foata normal form. 21/1969 useless extension candidates. Maximal degree in co-relation 8866. Up to 566 conditions per place. [2020-10-16 02:18:03,796 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 20 selfloop transitions, 225 changer transitions 0/479 dead transitions. [2020-10-16 02:18:03,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 479 transitions, 5677 flow [2020-10-16 02:18:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 02:18:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-16 02:18:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1946 transitions. [2020-10-16 02:18:03,799 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7455938697318008 [2020-10-16 02:18:03,799 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1946 transitions. [2020-10-16 02:18:03,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1946 transitions. [2020-10-16 02:18:03,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:18:03,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1946 transitions. [2020-10-16 02:18:03,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-16 02:18:03,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-16 02:18:03,803 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-16 02:18:03,803 INFO L185 Difference]: Start difference. First operand has 427 places, 462 transitions, 4964 flow. Second operand 18 states and 1946 transitions. [2020-10-16 02:18:03,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 479 transitions, 5677 flow [2020-10-16 02:18:05,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 479 transitions, 5074 flow, removed 85 selfloop flow, removed 14 redundant places. [2020-10-16 02:18:05,136 INFO L241 Difference]: Finished difference. Result has 431 places, 463 transitions, 5005 flow [2020-10-16 02:18:05,137 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4361, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5005, PETRI_PLACES=431, PETRI_TRANSITIONS=463} [2020-10-16 02:18:05,137 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 414 predicate places. [2020-10-16 02:18:05,137 INFO L481 AbstractCegarLoop]: Abstraction has has 431 places, 463 transitions, 5005 flow [2020-10-16 02:18:05,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 02:18:05,451 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:18:05,451 INFO L255 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:18:05,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 02:18:05,652 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:18:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:18:05,653 INFO L82 PathProgramCache]: Analyzing trace with hash -965827355, now seen corresponding path program 21 times [2020-10-16 02:18:05,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:18:05,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711551422] [2020-10-16 02:18:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:18:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:18:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 14 proven. 376 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-10-16 02:18:05,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711551422] [2020-10-16 02:18:05,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683326224] [2020-10-16 02:18:05,965 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:18:06,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-16 02:18:06,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:18:06,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 02:18:06,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:18:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 60 proven. 378 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-10-16 02:18:07,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:18:07,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2020-10-16 02:18:07,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190826374] [2020-10-16 02:18:07,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-16 02:18:07,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:18:07,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-16 02:18:07,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 02:18:07,132 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2020-10-16 02:18:07,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 463 transitions, 5005 flow. Second operand 34 states. [2020-10-16 02:18:07,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:18:07,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2020-10-16 02:18:07,136 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:18:24,076 INFO L129 PetriNetUnfolder]: 429/2395 cut-off events. [2020-10-16 02:18:24,076 INFO L130 PetriNetUnfolder]: For 897046/897048 co-relation queries the response was YES. [2020-10-16 02:18:24,101 INFO L80 FinitePrefix]: Finished finitePrefix Result has 22062 conditions, 2395 events. 429/2395 cut-off events. For 897046/897048 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 15678 event pairs, 6 based on Foata normal form. 74/2469 useless extension candidates. Maximal degree in co-relation 12908. Up to 645 conditions per place. [2020-10-16 02:18:24,113 INFO L132 encePairwiseOnDemand]: 139/145 looper letters, 646 selfloop transitions, 576 changer transitions 0/1227 dead transitions. [2020-10-16 02:18:24,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 719 places, 1227 transitions, 31256 flow [2020-10-16 02:18:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2020-10-16 02:18:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-16 02:18:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 26977 transitions. [2020-10-16 02:18:24,127 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6437656604223839 [2020-10-16 02:18:24,127 INFO L72 ComplementDD]: Start complementDD. Operand 289 states and 26977 transitions. [2020-10-16 02:18:24,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 289 states and 26977 transitions. [2020-10-16 02:18:24,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:18:24,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 289 states and 26977 transitions. [2020-10-16 02:18:24,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 290 states. [2020-10-16 02:18:24,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 290 states. [2020-10-16 02:18:24,176 INFO L81 ComplementDD]: Finished complementDD. Result 290 states. [2020-10-16 02:18:24,176 INFO L185 Difference]: Start difference. First operand has 431 places, 463 transitions, 5005 flow. Second operand 289 states and 26977 transitions. [2020-10-16 02:18:24,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 719 places, 1227 transitions, 31256 flow [2020-10-16 02:18:25,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 1227 transitions, 28280 flow, removed 1232 selfloop flow, removed 16 redundant places. [2020-10-16 02:18:25,327 INFO L241 Difference]: Finished difference. Result has 736 places, 589 transitions, 13694 flow [2020-10-16 02:18:25,328 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4416, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=289, PETRI_FLOW=13694, PETRI_PLACES=736, PETRI_TRANSITIONS=589} [2020-10-16 02:18:25,328 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 719 predicate places. [2020-10-16 02:18:25,328 INFO L481 AbstractCegarLoop]: Abstraction has has 736 places, 589 transitions, 13694 flow [2020-10-16 02:18:25,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-16 02:18:25,328 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:18:25,328 INFO L255 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:18:25,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 02:18:25,529 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:18:25,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:18:25,530 INFO L82 PathProgramCache]: Analyzing trace with hash -202059688, now seen corresponding path program 22 times [2020-10-16 02:18:25,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:18:25,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013270118] [2020-10-16 02:18:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:18:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:18:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 15 proven. 425 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-16 02:18:25,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013270118] [2020-10-16 02:18:25,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55531137] [2020-10-16 02:18:25,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:18:27,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 02:18:27,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:18:27,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 02:18:27,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:18:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 15 proven. 425 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-16 02:18:27,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:18:27,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 02:18:27,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205548337] [2020-10-16 02:18:27,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 02:18:27,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:18:27,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 02:18:27,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-16 02:18:27,132 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 145 [2020-10-16 02:18:27,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 589 transitions, 13694 flow. Second operand 21 states. [2020-10-16 02:18:27,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:18:27,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 145 [2020-10-16 02:18:27,133 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:18:28,182 INFO L129 PetriNetUnfolder]: 369/2341 cut-off events. [2020-10-16 02:18:28,182 INFO L130 PetriNetUnfolder]: For 660885/661163 co-relation queries the response was YES. [2020-10-16 02:18:28,235 INFO L80 FinitePrefix]: Finished finitePrefix Result has 19872 conditions, 2341 events. 369/2341 cut-off events. For 660885/661163 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 15566 event pairs, 45 based on Foata normal form. 19/2330 useless extension candidates. Maximal degree in co-relation 14741. Up to 671 conditions per place. [2020-10-16 02:18:28,244 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 22 selfloop transitions, 289 changer transitions 0/608 dead transitions. [2020-10-16 02:18:28,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 608 transitions, 14579 flow [2020-10-16 02:18:28,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 02:18:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 02:18:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2162 transitions. [2020-10-16 02:18:28,358 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7455172413793103 [2020-10-16 02:18:28,358 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2162 transitions. [2020-10-16 02:18:28,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2162 transitions. [2020-10-16 02:18:28,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:18:28,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2162 transitions. [2020-10-16 02:18:28,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 02:18:28,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 02:18:28,361 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 02:18:28,361 INFO L185 Difference]: Start difference. First operand has 736 places, 589 transitions, 13694 flow. Second operand 20 states and 2162 transitions. [2020-10-16 02:18:28,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 608 transitions, 14579 flow [2020-10-16 02:18:30,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 608 transitions, 6351 flow, removed 3572 selfloop flow, removed 226 redundant places. [2020-10-16 02:18:30,376 INFO L241 Difference]: Finished difference. Result has 530 places, 590 transitions, 6274 flow [2020-10-16 02:18:30,376 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=5466, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6274, PETRI_PLACES=530, PETRI_TRANSITIONS=590} [2020-10-16 02:18:30,377 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 513 predicate places. [2020-10-16 02:18:30,377 INFO L481 AbstractCegarLoop]: Abstraction has has 530 places, 590 transitions, 6274 flow [2020-10-16 02:18:30,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 02:18:30,377 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:18:30,377 INFO L255 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:18:30,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:18:30,578 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:18:30,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:18:30,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1420801164, now seen corresponding path program 23 times [2020-10-16 02:18:30,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:18:30,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723505383] [2020-10-16 02:18:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:18:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:18:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 15 proven. 477 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-16 02:18:30,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723505383] [2020-10-16 02:18:30,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205218095] [2020-10-16 02:18:30,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:18:31,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-10-16 02:18:31,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:18:31,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 02:18:31,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:18:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 68 proven. 435 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2020-10-16 02:18:31,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:18:31,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2020-10-16 02:18:31,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547316942] [2020-10-16 02:18:31,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-16 02:18:31,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:18:31,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-16 02:18:31,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=970, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 02:18:31,507 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2020-10-16 02:18:31,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 590 transitions, 6274 flow. Second operand 37 states. [2020-10-16 02:18:31,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:18:31,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2020-10-16 02:18:31,509 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:18:55,884 INFO L129 PetriNetUnfolder]: 493/2790 cut-off events. [2020-10-16 02:18:55,884 INFO L130 PetriNetUnfolder]: For 1382769/1382771 co-relation queries the response was YES. [2020-10-16 02:18:55,924 INFO L80 FinitePrefix]: Finished finitePrefix Result has 27387 conditions, 2790 events. 493/2790 cut-off events. For 1382769/1382771 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 18755 event pairs, 6 based on Foata normal form. 80/2870 useless extension candidates. Maximal degree in co-relation 15406. Up to 755 conditions per place. [2020-10-16 02:18:55,938 INFO L132 encePairwiseOnDemand]: 139/145 looper letters, 756 selfloop transitions, 680 changer transitions 0/1441 dead transitions. [2020-10-16 02:18:55,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 870 places, 1441 transitions, 38936 flow [2020-10-16 02:18:55,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 341 states. [2020-10-16 02:18:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-16 02:18:55,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 31822 transitions. [2020-10-16 02:18:55,953 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6435837799575286 [2020-10-16 02:18:55,953 INFO L72 ComplementDD]: Start complementDD. Operand 341 states and 31822 transitions. [2020-10-16 02:18:55,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 341 states and 31822 transitions. [2020-10-16 02:18:55,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:18:55,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 341 states and 31822 transitions. [2020-10-16 02:18:55,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 342 states. [2020-10-16 02:18:56,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 342 states. [2020-10-16 02:18:56,013 INFO L81 ComplementDD]: Finished complementDD. Result 342 states. [2020-10-16 02:18:56,013 INFO L185 Difference]: Start difference. First operand has 530 places, 590 transitions, 6274 flow. Second operand 341 states and 31822 transitions. [2020-10-16 02:18:56,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 870 places, 1441 transitions, 38936 flow [2020-10-16 02:18:57,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 1441 transitions, 35162 flow, removed 1581 selfloop flow, removed 18 redundant places. [2020-10-16 02:18:57,865 INFO L241 Difference]: Finished difference. Result has 888 places, 693 transitions, 16489 flow [2020-10-16 02:18:57,866 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=5527, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=341, PETRI_FLOW=16489, PETRI_PLACES=888, PETRI_TRANSITIONS=693} [2020-10-16 02:18:57,866 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 871 predicate places. [2020-10-16 02:18:57,868 INFO L481 AbstractCegarLoop]: Abstraction has has 888 places, 693 transitions, 16489 flow [2020-10-16 02:18:57,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-16 02:18:57,869 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:18:57,869 INFO L255 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:18:58,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 02:18:58,083 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:18:58,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:18:58,083 INFO L82 PathProgramCache]: Analyzing trace with hash -627974343, now seen corresponding path program 24 times [2020-10-16 02:18:58,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:18:58,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239054284] [2020-10-16 02:18:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:18:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:18:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-16 02:18:58,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239054284] [2020-10-16 02:18:58,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235187942] [2020-10-16 02:18:58,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:18:58,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-10-16 02:18:58,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:18:58,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 02:18:58,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:18:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-16 02:18:58,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:18:58,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 02:18:58,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225246040] [2020-10-16 02:18:58,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 02:18:58,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:18:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 02:18:58,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-16 02:18:58,905 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 145 [2020-10-16 02:18:58,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 888 places, 693 transitions, 16489 flow. Second operand 20 states. [2020-10-16 02:18:58,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:18:58,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 145 [2020-10-16 02:18:58,906 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:19:00,261 INFO L129 PetriNetUnfolder]: 431/2752 cut-off events. [2020-10-16 02:19:00,261 INFO L130 PetriNetUnfolder]: For 1038955/1039291 co-relation queries the response was YES. [2020-10-16 02:19:00,318 INFO L80 FinitePrefix]: Finished finitePrefix Result has 25216 conditions, 2752 events. 431/2752 cut-off events. For 1038955/1039291 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 18843 event pairs, 52 based on Foata normal form. 22/2741 useless extension candidates. Maximal degree in co-relation 19748. Up to 789 conditions per place. [2020-10-16 02:19:00,328 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 21 selfloop transitions, 341 changer transitions 0/711 dead transitions. [2020-10-16 02:19:00,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 906 places, 711 transitions, 17533 flow [2020-10-16 02:19:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 02:19:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 02:19:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2149 transitions. [2020-10-16 02:19:00,330 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7800362976406534 [2020-10-16 02:19:00,330 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2149 transitions. [2020-10-16 02:19:00,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2149 transitions. [2020-10-16 02:19:00,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:19:00,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2149 transitions. [2020-10-16 02:19:00,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 02:19:00,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 02:19:00,333 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 02:19:00,333 INFO L185 Difference]: Start difference. First operand has 888 places, 693 transitions, 16489 flow. Second operand 19 states and 2149 transitions. [2020-10-16 02:19:00,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 906 places, 711 transitions, 17533 flow [2020-10-16 02:19:04,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 711 transitions, 7511 flow, removed 4368 selfloop flow, removed 289 redundant places. [2020-10-16 02:19:04,458 INFO L241 Difference]: Finished difference. Result has 618 places, 694 transitions, 7443 flow [2020-10-16 02:19:04,458 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=6467, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7443, PETRI_PLACES=618, PETRI_TRANSITIONS=694} [2020-10-16 02:19:04,459 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 601 predicate places. [2020-10-16 02:19:04,459 INFO L481 AbstractCegarLoop]: Abstraction has has 618 places, 694 transitions, 7443 flow [2020-10-16 02:19:04,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 02:19:04,459 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:19:04,459 INFO L255 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:19:04,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:19:04,660 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:19:04,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:19:04,661 INFO L82 PathProgramCache]: Analyzing trace with hash 804828786, now seen corresponding path program 25 times [2020-10-16 02:19:04,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:19:04,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637665560] [2020-10-16 02:19:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:19:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:19:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2020-10-16 02:19:04,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637665560] [2020-10-16 02:19:04,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931531260] [2020-10-16 02:19:04,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:19:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:19:05,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 02:19:05,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:19:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 81 proven. 532 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-10-16 02:19:05,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:19:05,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 40 [2020-10-16 02:19:05,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849758484] [2020-10-16 02:19:05,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-16 02:19:05,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:19:05,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-16 02:19:05,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1140, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 02:19:05,660 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2020-10-16 02:19:05,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 694 transitions, 7443 flow. Second operand 40 states. [2020-10-16 02:19:05,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:19:05,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2020-10-16 02:19:05,662 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:19:41,259 INFO L129 PetriNetUnfolder]: 562/3196 cut-off events. [2020-10-16 02:19:41,259 INFO L130 PetriNetUnfolder]: For 2037188/2037190 co-relation queries the response was YES. [2020-10-16 02:19:41,308 INFO L80 FinitePrefix]: Finished finitePrefix Result has 31643 conditions, 3196 events. 562/3196 cut-off events. For 2037188/2037190 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 21908 event pairs, 5 based on Foata normal form. 85/3281 useless extension candidates. Maximal degree in co-relation 22186. Up to 858 conditions per place. [2020-10-16 02:19:41,324 INFO L132 encePairwiseOnDemand]: 138/145 looper letters, 842 selfloop transitions, 817 changer transitions 0/1664 dead transitions. [2020-10-16 02:19:41,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1017 places, 1664 transitions, 44843 flow [2020-10-16 02:19:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2020-10-16 02:19:41,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-10-16 02:19:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 37299 transitions. [2020-10-16 02:19:41,345 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6430862068965517 [2020-10-16 02:19:41,345 INFO L72 ComplementDD]: Start complementDD. Operand 400 states and 37299 transitions. [2020-10-16 02:19:41,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 400 states and 37299 transitions. [2020-10-16 02:19:41,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:19:41,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 400 states and 37299 transitions. [2020-10-16 02:19:41,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 401 states. [2020-10-16 02:19:41,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 401 states. [2020-10-16 02:19:41,392 INFO L81 ComplementDD]: Finished complementDD. Result 401 states. [2020-10-16 02:19:41,393 INFO L185 Difference]: Start difference. First operand has 618 places, 694 transitions, 7443 flow. Second operand 400 states and 37299 transitions. [2020-10-16 02:19:41,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1017 places, 1664 transitions, 44843 flow [2020-10-16 02:19:44,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1000 places, 1664 transitions, 39005 flow, removed 2562 selfloop flow, removed 17 redundant places. [2020-10-16 02:19:44,214 INFO L241 Difference]: Finished difference. Result has 1057 places, 829 transitions, 20204 flow [2020-10-16 02:19:44,215 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=6538, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=682, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=400, PETRI_FLOW=20204, PETRI_PLACES=1057, PETRI_TRANSITIONS=829} [2020-10-16 02:19:44,216 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 1040 predicate places. [2020-10-16 02:19:44,216 INFO L481 AbstractCegarLoop]: Abstraction has has 1057 places, 829 transitions, 20204 flow [2020-10-16 02:19:44,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-16 02:19:44,216 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:19:44,216 INFO L255 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:19:44,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 02:19:44,422 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:19:44,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:19:44,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2085343719, now seen corresponding path program 26 times [2020-10-16 02:19:44,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:19:44,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437526289] [2020-10-16 02:19:44,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:19:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:19:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 20 proven. 630 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-16 02:19:44,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437526289] [2020-10-16 02:19:44,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179056712] [2020-10-16 02:19:44,796 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:19:44,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 02:19:44,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:19:44,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 02:19:44,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:19:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 20 proven. 630 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-16 02:19:44,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:19:44,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 02:19:44,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708875172] [2020-10-16 02:19:44,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 02:19:44,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:19:44,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 02:19:44,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-16 02:19:44,967 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 145 [2020-10-16 02:19:44,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1057 places, 829 transitions, 20204 flow. Second operand 22 states. [2020-10-16 02:19:44,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:19:44,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 145 [2020-10-16 02:19:44,969 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:19:47,218 INFO L129 PetriNetUnfolder]: 517/3192 cut-off events. [2020-10-16 02:19:47,218 INFO L130 PetriNetUnfolder]: For 1873375/1873586 co-relation queries the response was YES. [2020-10-16 02:19:47,291 INFO L80 FinitePrefix]: Finished finitePrefix Result has 39499 conditions, 3192 events. 517/3192 cut-off events. For 1873375/1873586 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 22168 event pairs, 76 based on Foata normal form. 44/3218 useless extension candidates. Maximal degree in co-relation 35541. Up to 894 conditions per place. [2020-10-16 02:19:47,303 INFO L132 encePairwiseOnDemand]: 142/145 looper letters, 23 selfloop transitions, 400 changer transitions 0/849 dead transitions. [2020-10-16 02:19:47,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1077 places, 849 transitions, 21420 flow [2020-10-16 02:19:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 02:19:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-16 02:19:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2375 transitions. [2020-10-16 02:19:47,305 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7799671592775042 [2020-10-16 02:19:47,305 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2375 transitions. [2020-10-16 02:19:47,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2375 transitions. [2020-10-16 02:19:47,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:19:47,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2375 transitions. [2020-10-16 02:19:47,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-16 02:19:47,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-16 02:19:47,308 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-16 02:19:47,308 INFO L185 Difference]: Start difference. First operand has 1057 places, 829 transitions, 20204 flow. Second operand 21 states and 2375 transitions. [2020-10-16 02:19:47,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1077 places, 849 transitions, 21420 flow [2020-10-16 02:19:54,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 849 transitions, 8766 flow, removed 5569 selfloop flow, removed 341 redundant places. [2020-10-16 02:19:54,964 INFO L241 Difference]: Finished difference. Result has 737 places, 830 transitions, 8689 flow [2020-10-16 02:19:54,965 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=7550, PETRI_DIFFERENCE_MINUEND_PLACES=716, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8689, PETRI_PLACES=737, PETRI_TRANSITIONS=830} [2020-10-16 02:19:54,965 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 720 predicate places. [2020-10-16 02:19:54,965 INFO L481 AbstractCegarLoop]: Abstraction has has 737 places, 830 transitions, 8689 flow [2020-10-16 02:19:54,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 02:19:54,966 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:19:54,966 INFO L255 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:19:55,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 02:19:55,181 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:19:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:19:55,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1566114670, now seen corresponding path program 27 times [2020-10-16 02:19:55,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:19:55,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974601505] [2020-10-16 02:19:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:19:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:19:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 0 proven. 723 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-16 02:19:55,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974601505] [2020-10-16 02:19:55,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994683459] [2020-10-16 02:19:55,690 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:19:56,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-10-16 02:19:56,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:19:56,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 02:19:56,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:19:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 0 proven. 723 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-16 02:19:56,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:19:56,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 02:19:56,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462233374] [2020-10-16 02:19:56,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 02:19:56,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:19:56,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 02:19:56,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-16 02:19:56,272 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 145 [2020-10-16 02:19:56,273 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 830 transitions, 8689 flow. Second operand 23 states. [2020-10-16 02:19:56,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:19:56,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 145 [2020-10-16 02:19:56,274 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:19:58,153 INFO L129 PetriNetUnfolder]: 538/3275 cut-off events. [2020-10-16 02:19:58,153 INFO L130 PetriNetUnfolder]: For 1348683/1348896 co-relation queries the response was YES. [2020-10-16 02:19:58,311 INFO L80 FinitePrefix]: Finished finitePrefix Result has 33840 conditions, 3275 events. 538/3275 cut-off events. For 1348683/1348896 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 22694 event pairs, 97 based on Foata normal form. 49/3306 useless extension candidates. Maximal degree in co-relation 29980. Up to 914 conditions per place. [2020-10-16 02:19:58,324 INFO L132 encePairwiseOnDemand]: 141/145 looper letters, 22 selfloop transitions, 402 changer transitions 0/850 dead transitions. [2020-10-16 02:19:58,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 758 places, 850 transitions, 9597 flow [2020-10-16 02:19:58,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 02:19:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-16 02:19:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2487 transitions. [2020-10-16 02:19:58,327 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7796238244514107 [2020-10-16 02:19:58,327 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2487 transitions. [2020-10-16 02:19:58,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2487 transitions. [2020-10-16 02:19:58,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:19:58,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2487 transitions. [2020-10-16 02:19:58,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-16 02:19:58,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-16 02:19:58,333 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-16 02:19:58,333 INFO L185 Difference]: Start difference. First operand has 737 places, 830 transitions, 8689 flow. Second operand 22 states and 2487 transitions. [2020-10-16 02:19:58,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 758 places, 850 transitions, 9597 flow [2020-10-16 02:20:09,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 739 places, 850 transitions, 8535 flow, removed 142 selfloop flow, removed 19 redundant places. [2020-10-16 02:20:09,176 INFO L241 Difference]: Finished difference. Result has 741 places, 831 transitions, 8464 flow [2020-10-16 02:20:09,177 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=7627, PETRI_DIFFERENCE_MINUEND_PLACES=718, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=401, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8464, PETRI_PLACES=741, PETRI_TRANSITIONS=831} [2020-10-16 02:20:09,177 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 724 predicate places. [2020-10-16 02:20:09,177 INFO L481 AbstractCegarLoop]: Abstraction has has 741 places, 831 transitions, 8464 flow [2020-10-16 02:20:09,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 02:20:09,177 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:20:09,178 INFO L255 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:20:09,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 02:20:09,384 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:20:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:20:09,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2095218869, now seen corresponding path program 28 times [2020-10-16 02:20:09,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:20:09,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447461219] [2020-10-16 02:20:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:20:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:20:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:20:13,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447461219] [2020-10-16 02:20:13,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265161815] [2020-10-16 02:20:13,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:20:15,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 02:20:15,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:20:15,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-16 02:20:15,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:20:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:20:15,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:20:15,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-16 02:20:15,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724694534] [2020-10-16 02:20:15,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-16 02:20:15,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:20:15,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-16 02:20:15,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 02:20:15,360 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 145 [2020-10-16 02:20:15,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 741 places, 831 transitions, 8464 flow. Second operand 63 states. [2020-10-16 02:20:15,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:20:15,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 145 [2020-10-16 02:20:15,363 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:22:15,217 INFO L129 PetriNetUnfolder]: 5622/31252 cut-off events. [2020-10-16 02:22:15,217 INFO L130 PetriNetUnfolder]: For 27125600/27126202 co-relation queries the response was YES. [2020-10-16 02:22:17,941 INFO L80 FinitePrefix]: Finished finitePrefix Result has 519196 conditions, 31252 events. 5622/31252 cut-off events. For 27125600/27126202 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 386415 event pairs, 108 based on Foata normal form. 7/31206 useless extension candidates. Maximal degree in co-relation 504860. Up to 5781 conditions per place. [2020-10-16 02:22:18,036 INFO L132 encePairwiseOnDemand]: 140/145 looper letters, 146 selfloop transitions, 1195 changer transitions 0/2145 dead transitions. [2020-10-16 02:22:18,037 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1349 places, 2145 transitions, 14262 flow [2020-10-16 02:22:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 609 states. [2020-10-16 02:22:18,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2020-10-16 02:22:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 62809 transitions. [2020-10-16 02:22:18,064 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7112734273257459 [2020-10-16 02:22:18,064 INFO L72 ComplementDD]: Start complementDD. Operand 609 states and 62809 transitions. [2020-10-16 02:22:18,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 609 states and 62809 transitions. [2020-10-16 02:22:18,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:22:18,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 609 states and 62809 transitions. [2020-10-16 02:22:18,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 610 states. [2020-10-16 02:22:18,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 610 states. [2020-10-16 02:22:18,129 INFO L81 ComplementDD]: Finished complementDD. Result 610 states. [2020-10-16 02:22:18,129 INFO L185 Difference]: Start difference. First operand has 741 places, 831 transitions, 8464 flow. Second operand 609 states and 62809 transitions. [2020-10-16 02:22:18,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1349 places, 2145 transitions, 14262 flow [2020-10-16 02:28:57,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1330 places, 2145 transitions, 13135 flow, removed 143 selfloop flow, removed 19 redundant places. [2020-10-16 02:28:57,801 INFO L241 Difference]: Finished difference. Result has 1331 places, 2082 transitions, 12436 flow [2020-10-16 02:28:57,802 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=7400, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=609, PETRI_FLOW=12436, PETRI_PLACES=1331, PETRI_TRANSITIONS=2082} [2020-10-16 02:28:57,803 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 1314 predicate places. [2020-10-16 02:28:57,803 INFO L481 AbstractCegarLoop]: Abstraction has has 1331 places, 2082 transitions, 12436 flow [2020-10-16 02:28:57,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-16 02:28:57,803 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:28:57,803 INFO L255 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:28:58,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:28:58,018 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:28:58,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:28:58,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1788740981, now seen corresponding path program 29 times [2020-10-16 02:28:58,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:28:58,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714397153] [2020-10-16 02:28:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:28:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:29:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:29:01,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714397153] [2020-10-16 02:29:01,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347934498] [2020-10-16 02:29:01,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:29:02,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-10-16 02:29:02,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:29:02,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-16 02:29:02,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:29:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:29:02,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:29:02,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-16 02:29:02,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994175117] [2020-10-16 02:29:02,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-16 02:29:02,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:29:02,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-16 02:29:02,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 02:29:02,499 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 145 [2020-10-16 02:29:02,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1331 places, 2082 transitions, 12436 flow. Second operand 63 states. [2020-10-16 02:29:02,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:29:02,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 145 [2020-10-16 02:29:02,502 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2020-10-16 02:30:16,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 434 states. [2020-10-16 02:30:16,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-16 02:30:16,586 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 02:30:16,591 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 02:30:16,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:30:16 BasicIcfg [2020-10-16 02:30:16,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 02:30:16,593 INFO L168 Benchmark]: Toolchain (without parser) took 791086.51 ms. Allocated memory was 246.4 MB in the beginning and 6.2 GB in the end (delta: 6.0 GB). Free memory was 201.6 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 4.4 GB. Max. memory is 14.2 GB. [2020-10-16 02:30:16,593 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 246.4 MB. Free memory is still 222.8 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 02:30:16,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1201.44 ms. Allocated memory was 246.4 MB in the beginning and 299.9 MB in the end (delta: 53.5 MB). Free memory was 201.6 MB in the beginning and 200.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 65.3 MB. Max. memory is 14.2 GB. [2020-10-16 02:30:16,594 INFO L168 Benchmark]: Boogie Procedure Inliner took 92.50 ms. Allocated memory is still 299.9 MB. Free memory was 200.0 MB in the beginning and 197.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 02:30:16,594 INFO L168 Benchmark]: Boogie Preprocessor took 32.67 ms. Allocated memory is still 299.9 MB. Free memory was 197.5 MB in the beginning and 195.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 02:30:16,594 INFO L168 Benchmark]: RCFGBuilder took 477.40 ms. Allocated memory is still 299.9 MB. Free memory was 195.0 MB in the beginning and 170.6 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 14.2 GB. [2020-10-16 02:30:16,595 INFO L168 Benchmark]: TraceAbstraction took 789277.05 ms. Allocated memory was 299.9 MB in the beginning and 6.2 GB in the end (delta: 5.9 GB). Free memory was 170.6 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 4.3 GB. Max. memory is 14.2 GB. [2020-10-16 02:30:16,597 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 246.4 MB. Free memory is still 222.8 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 1201.44 ms. Allocated memory was 246.4 MB in the beginning and 299.9 MB in the end (delta: 53.5 MB). Free memory was 201.6 MB in the beginning and 200.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 65.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 92.50 ms. Allocated memory is still 299.9 MB. Free memory was 200.0 MB in the beginning and 197.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 32.67 ms. Allocated memory is still 299.9 MB. Free memory was 197.5 MB in the beginning and 195.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 477.40 ms. Allocated memory is still 299.9 MB. Free memory was 195.0 MB in the beginning and 170.6 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 14.2 GB. * TraceAbstraction took 789277.05 ms. Allocated memory was 299.9 MB in the beginning and 6.2 GB in the end (delta: 5.9 GB). Free memory was 170.6 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 4.3 GB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 434 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 4 SemBasedMoverChecksPositive, 15 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 38 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.3s, 71 PlacesBefore, 17 PlacesAfterwards, 73 TransitionsBefore, 15 TransitionsAfterwards, 646 CoEnabledTransitionPairs, 6 FixpointIterations, 31 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 870 MoverChecksTotal - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 462 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 75 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: 789.1s, OverallIterations: 31, TraceHistogramMax: 20, AutomataDifference: 753.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.4s, HoareTripleCheckerStatistics: 284 SDtfs, 6756 SDslu, 4037 SDs, 0 SdLazy, 130331 SolverSat, 5804 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7130 GetRequests, 3934 SyntacticMatches, 5 SemanticMatches, 3190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424425 ImplicationChecksByTransitivity, 168.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20204occurred in iteration=27, 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: 0.6s SsaConstructionTime, 7.8s SatisfiabilityAnalysisTime, 15.6s InterpolantComputationTime, 4771 NumberOfCodeBlocks, 4747 NumberOfCodeBlocksAsserted, 230 NumberOfCheckSat, 4711 ConstructedInterpolants, 0 QuantifiedInterpolants, 1632791 SizeOfPredicates, 107 NumberOfNonLiveVariables, 9752 ConjunctsInSsa, 641 ConjunctsInUnsatCore, 60 InterpolantComputations, 3 PerfectInterpolantSequences, 11927/29383 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