/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 19:19:47,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 19:19:47,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 19:19:47,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 19:19:47,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 19:19:47,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 19:19:47,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 19:19:47,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 19:19:47,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 19:19:47,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 19:19:47,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 19:19:47,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 19:19:47,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 19:19:47,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 19:19:47,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 19:19:47,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 19:19:47,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 19:19:47,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 19:19:47,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 19:19:47,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 19:19:47,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 19:19:47,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 19:19:47,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 19:19:47,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 19:19:47,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 19:19:47,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 19:19:47,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 19:19:47,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 19:19:47,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 19:19:47,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 19:19:47,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 19:19:47,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 19:19:47,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 19:19:47,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 19:19:47,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 19:19:47,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 19:19:47,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 19:19:47,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 19:19:47,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 19:19:47,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 19:19:47,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 19:19:47,158 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-11 19:19:47,183 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 19:19:47,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 19:19:47,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 19:19:47,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 19:19:47,185 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 19:19:47,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 19:19:47,185 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 19:19:47,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 19:19:47,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 19:19:47,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 19:19:47,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 19:19:47,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 19:19:47,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 19:19:47,187 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 19:19:47,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 19:19:47,187 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 19:19:47,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 19:19:47,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 19:19:47,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 19:19:47,188 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 19:19:47,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 19:19:47,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 19:19:47,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 19:19:47,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 19:19:47,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 19:19:47,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 19:19:47,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 19:19:47,190 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-11 19:19:47,190 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-11 19:19:47,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 19:19:47,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 19:19:47,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 19:19:47,537 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 19:19:47,540 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 19:19:47,549 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 19:19:47,550 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-11 19:19:47,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b217b7a4a/6da75aaba6c64026a2c4b67d4129ae0b/FLAG740ca1c4c [2020-10-11 19:19:48,322 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 19:19:48,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-11 19:19:48,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b217b7a4a/6da75aaba6c64026a2c4b67d4129ae0b/FLAG740ca1c4c [2020-10-11 19:19:48,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b217b7a4a/6da75aaba6c64026a2c4b67d4129ae0b [2020-10-11 19:19:48,489 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 19:19:48,491 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 19:19:48,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 19:19:48,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 19:19:48,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 19:19:48,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:19:48" (1/1) ... [2020-10-11 19:19:48,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@534b5ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:19:48, skipping insertion in model container [2020-10-11 19:19:48,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:19:48" (1/1) ... [2020-10-11 19:19:48,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 19:19:48,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 19:19:49,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 19:19:49,301 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 19:19:49,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 19:19:49,568 INFO L208 MainTranslator]: Completed translation [2020-10-11 19:19:49,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:19:49 WrapperNode [2020-10-11 19:19:49,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 19:19:49,570 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 19:19:49,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 19:19:49,571 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 19:19:49,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:19:49" (1/1) ... [2020-10-11 19:19:49,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:19:49" (1/1) ... [2020-10-11 19:19:49,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 19:19:49,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 19:19:49,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 19:19:49,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 19:19:49,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:19:49" (1/1) ... [2020-10-11 19:19:49,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:19:49" (1/1) ... [2020-10-11 19:19:49,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:19:49" (1/1) ... [2020-10-11 19:19:49,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:19:49" (1/1) ... [2020-10-11 19:19:49,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:19:49" (1/1) ... [2020-10-11 19:19:49,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:19:49" (1/1) ... [2020-10-11 19:19:49,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:19:49" (1/1) ... [2020-10-11 19:19:49,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 19:19:49,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 19:19:49,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 19:19:49,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 19:19:49,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:19:49" (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 [2020-10-11 19:19:49,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 19:19:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 19:19:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-11 19:19:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 19:19:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-11 19:19:49,757 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-10-11 19:19:49,757 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-10-11 19:19:49,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-11 19:19:49,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 19:19:49,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 19:19:49,760 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 19:19:50,202 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 19:19:50,203 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-11 19:19:50,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:19:50 BoogieIcfgContainer [2020-10-11 19:19:50,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 19:19:50,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 19:19:50,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 19:19:50,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 19:19:50,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:19:48" (1/3) ... [2020-10-11 19:19:50,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b667ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:19:50, skipping insertion in model container [2020-10-11 19:19:50,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:19:49" (2/3) ... [2020-10-11 19:19:50,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b667ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:19:50, skipping insertion in model container [2020-10-11 19:19:50,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:19:50" (3/3) ... [2020-10-11 19:19:50,217 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-10-11 19:19:50,231 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 19:19:50,241 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 19:19:50,242 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 19:19:50,272 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,273 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,273 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,273 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,274 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,274 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,274 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,274 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,275 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,275 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,275 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,276 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,276 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,276 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,277 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,277 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,277 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,278 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,278 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,278 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,278 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,279 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,279 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,283 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,284 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,284 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,284 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,285 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,285 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,285 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,285 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,286 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:19:50,316 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 19:19:50,338 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 19:19:50,338 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 19:19:50,338 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 19:19:50,339 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 19:19:50,339 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 19:19:50,339 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 19:19:50,339 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 19:19:50,339 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 19:19:50,355 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-10-11 19:19:50,411 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-10-11 19:19:50,411 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 19:19:50,417 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. [2020-10-11 19:19:50,418 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 81 transitions, 170 flow [2020-10-11 19:19:50,425 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 73 transitions, 152 flow [2020-10-11 19:19:50,468 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2020-10-11 19:19:50,469 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 19:19:50,469 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:19:50,470 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:19:50,471 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:19:50,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:19:50,478 INFO L82 PathProgramCache]: Analyzing trace with hash -330520276, now seen corresponding path program 1 times [2020-10-11 19:19:50,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:19:50,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290321651] [2020-10-11 19:19:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:19:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:19:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:19:50,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290321651] [2020-10-11 19:19:50,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 19:19:50,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 19:19:50,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784606122] [2020-10-11 19:19:50,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 19:19:50,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:19:50,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 19:19:50,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 19:19:50,814 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 81 [2020-10-11 19:19:50,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 152 flow. Second operand 2 states. [2020-10-11 19:19:50,816 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:19:50,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 81 [2020-10-11 19:19:50,820 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:19:50,872 INFO L129 PetriNetUnfolder]: 2/67 cut-off events. [2020-10-11 19:19:50,873 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 19:19:50,873 INFO L80 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 67 events. 2/67 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 4/68 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2020-10-11 19:19:50,875 INFO L132 encePairwiseOnDemand]: 77/81 looper letters, 0 selfloop transitions, 0 changer transitions 0/67 dead transitions. [2020-10-11 19:19:50,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 140 flow [2020-10-11 19:19:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 19:19:50,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 19:19:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2020-10-11 19:19:50,893 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9382716049382716 [2020-10-11 19:19:50,894 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2020-10-11 19:19:50,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2020-10-11 19:19:50,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:19:50,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2020-10-11 19:19:50,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 19:19:50,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 19:19:50,920 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 19:19:50,923 INFO L185 Difference]: Start difference. First operand has 71 places, 73 transitions, 152 flow. Second operand 2 states and 152 transitions. [2020-10-11 19:19:50,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 140 flow [2020-10-11 19:19:50,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 19:19:50,941 INFO L241 Difference]: Finished difference. Result has 68 places, 67 transitions, 136 flow [2020-10-11 19:19:50,944 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=136, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2020-10-11 19:19:50,945 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2020-10-11 19:19:50,945 INFO L481 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 136 flow [2020-10-11 19:19:50,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 19:19:50,946 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:19:50,946 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:19:50,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 19:19:50,947 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:19:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:19:50,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1037567958, now seen corresponding path program 1 times [2020-10-11 19:19:50,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:19:50,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282035221] [2020-10-11 19:19:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:19:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:19:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:19:51,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282035221] [2020-10-11 19:19:51,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 19:19:51,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 19:19:51,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568808338] [2020-10-11 19:19:51,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 19:19:51,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:19:51,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 19:19:51,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 19:19:51,136 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 81 [2020-10-11 19:19:51,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 136 flow. Second operand 3 states. [2020-10-11 19:19:51,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:19:51,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 81 [2020-10-11 19:19:51,137 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:19:51,157 INFO L129 PetriNetUnfolder]: 2/77 cut-off events. [2020-10-11 19:19:51,158 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 19:19:51,159 INFO L80 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 2/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2020-10-11 19:19:51,159 INFO L132 encePairwiseOnDemand]: 78/81 looper letters, 4 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2020-10-11 19:19:51,160 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 68 transitions, 150 flow [2020-10-11 19:19:51,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 19:19:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 19:19:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2020-10-11 19:19:51,163 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8806584362139918 [2020-10-11 19:19:51,163 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 214 transitions. [2020-10-11 19:19:51,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 214 transitions. [2020-10-11 19:19:51,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:19:51,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 214 transitions. [2020-10-11 19:19:51,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 19:19:51,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 19:19:51,167 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 19:19:51,167 INFO L185 Difference]: Start difference. First operand has 68 places, 67 transitions, 136 flow. Second operand 3 states and 214 transitions. [2020-10-11 19:19:51,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 68 transitions, 150 flow [2020-10-11 19:19:51,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 68 transitions, 150 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 19:19:51,171 INFO L241 Difference]: Finished difference. Result has 71 places, 68 transitions, 148 flow [2020-10-11 19:19:51,172 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2020-10-11 19:19:51,172 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2020-10-11 19:19:51,172 INFO L481 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 148 flow [2020-10-11 19:19:51,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 19:19:51,173 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:19:51,174 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:19:51,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 19:19:51,174 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:19:51,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:19:51,175 INFO L82 PathProgramCache]: Analyzing trace with hash -752773584, now seen corresponding path program 1 times [2020-10-11 19:19:51,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:19:51,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903692325] [2020-10-11 19:19:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:19:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:19:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:19:51,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903692325] [2020-10-11 19:19:51,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822794264] [2020-10-11 19:19:51,320 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 [2020-10-11 19:19:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:19:51,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-11 19:19:51,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:19:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 19:19:51,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 19:19:51,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-10-11 19:19:51,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365500333] [2020-10-11 19:19:51,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 19:19:51,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:19:51,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 19:19:51,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 19:19:51,535 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 81 [2020-10-11 19:19:51,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 148 flow. Second operand 3 states. [2020-10-11 19:19:51,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:19:51,536 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 81 [2020-10-11 19:19:51,536 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:19:51,558 INFO L129 PetriNetUnfolder]: 2/84 cut-off events. [2020-10-11 19:19:51,558 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 19:19:51,560 INFO L80 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 84 events. 2/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 1/84 useless extension candidates. Maximal degree in co-relation 96. Up to 6 conditions per place. [2020-10-11 19:19:51,561 INFO L132 encePairwiseOnDemand]: 78/81 looper letters, 4 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2020-10-11 19:19:51,561 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 69 transitions, 162 flow [2020-10-11 19:19:51,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 19:19:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 19:19:51,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2020-10-11 19:19:51,564 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8806584362139918 [2020-10-11 19:19:51,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 214 transitions. [2020-10-11 19:19:51,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 214 transitions. [2020-10-11 19:19:51,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:19:51,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 214 transitions. [2020-10-11 19:19:51,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 19:19:51,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 19:19:51,567 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 19:19:51,567 INFO L185 Difference]: Start difference. First operand has 71 places, 68 transitions, 148 flow. Second operand 3 states and 214 transitions. [2020-10-11 19:19:51,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 69 transitions, 162 flow [2020-10-11 19:19:51,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 19:19:51,571 INFO L241 Difference]: Finished difference. Result has 73 places, 69 transitions, 158 flow [2020-10-11 19:19:51,571 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2020-10-11 19:19:51,572 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2020-10-11 19:19:51,572 INFO L481 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 158 flow [2020-10-11 19:19:51,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 19:19:51,572 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:19:51,572 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:19:51,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-11 19:19:51,788 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:19:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:19:51,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1483306937, now seen corresponding path program 1 times [2020-10-11 19:19:51,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:19:51,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790490168] [2020-10-11 19:19:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:19:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:19:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 19:19:51,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790490168] [2020-10-11 19:19:51,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906318082] [2020-10-11 19:19:51,880 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 [2020-10-11 19:19:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:19:51,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-11 19:19:51,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:19:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 19:19:52,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:19:52,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-11 19:19:52,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441121992] [2020-10-11 19:19:52,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 19:19:52,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:19:52,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 19:19:52,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-11 19:19:52,108 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:19:52,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 158 flow. Second operand 7 states. [2020-10-11 19:19:52,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:19:52,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:19:52,109 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:19:52,178 INFO L129 PetriNetUnfolder]: 2/95 cut-off events. [2020-10-11 19:19:52,178 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-10-11 19:19:52,180 INFO L80 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 95 events. 2/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 118. Up to 8 conditions per place. [2020-10-11 19:19:52,181 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2020-10-11 19:19:52,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 73 transitions, 192 flow [2020-10-11 19:19:52,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 19:19:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 19:19:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 415 transitions. [2020-10-11 19:19:52,184 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8539094650205762 [2020-10-11 19:19:52,184 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 415 transitions. [2020-10-11 19:19:52,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 415 transitions. [2020-10-11 19:19:52,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:19:52,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 415 transitions. [2020-10-11 19:19:52,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 19:19:52,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 19:19:52,189 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 19:19:52,189 INFO L185 Difference]: Start difference. First operand has 73 places, 69 transitions, 158 flow. Second operand 6 states and 415 transitions. [2020-10-11 19:19:52,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 73 transitions, 192 flow [2020-10-11 19:19:52,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 73 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 19:19:52,193 INFO L241 Difference]: Finished difference. Result has 80 places, 72 transitions, 188 flow [2020-10-11 19:19:52,194 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2020-10-11 19:19:52,194 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2020-10-11 19:19:52,194 INFO L481 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 188 flow [2020-10-11 19:19:52,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 19:19:52,194 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:19:52,195 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:19:52,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:19:52,409 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:19:52,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:19:52,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1159528039, now seen corresponding path program 2 times [2020-10-11 19:19:52,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:19:52,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82187045] [2020-10-11 19:19:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:19:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:19:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-11 19:19:52,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82187045] [2020-10-11 19:19:52,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993291582] [2020-10-11 19:19:52,506 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 [2020-10-11 19:19:52,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 19:19:52,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:19:52,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-11 19:19:52,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:19:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-11 19:19:52,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:19:52,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-11 19:19:52,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76402931] [2020-10-11 19:19:52,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 19:19:52,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:19:52,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 19:19:52,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-11 19:19:52,703 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:19:52,704 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 188 flow. Second operand 7 states. [2020-10-11 19:19:52,704 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:19:52,704 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:19:52,704 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:19:52,766 INFO L129 PetriNetUnfolder]: 2/103 cut-off events. [2020-10-11 19:19:52,766 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2020-10-11 19:19:52,767 INFO L80 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 103 events. 2/103 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 1/103 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2020-10-11 19:19:52,768 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2020-10-11 19:19:52,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 76 transitions, 222 flow [2020-10-11 19:19:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 19:19:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 19:19:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 415 transitions. [2020-10-11 19:19:52,771 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8539094650205762 [2020-10-11 19:19:52,771 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 415 transitions. [2020-10-11 19:19:52,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 415 transitions. [2020-10-11 19:19:52,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:19:52,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 415 transitions. [2020-10-11 19:19:52,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 19:19:52,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 19:19:52,775 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 19:19:52,776 INFO L185 Difference]: Start difference. First operand has 80 places, 72 transitions, 188 flow. Second operand 6 states and 415 transitions. [2020-10-11 19:19:52,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 76 transitions, 222 flow [2020-10-11 19:19:52,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 76 transitions, 216 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-11 19:19:52,780 INFO L241 Difference]: Finished difference. Result has 86 places, 75 transitions, 214 flow [2020-10-11 19:19:52,780 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2020-10-11 19:19:52,781 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 15 predicate places. [2020-10-11 19:19:52,781 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 214 flow [2020-10-11 19:19:52,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 19:19:52,781 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:19:52,781 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:19:52,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:19:52,995 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:19:52,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:19:52,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1913044584, now seen corresponding path program 3 times [2020-10-11 19:19:52,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:19:52,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014415842] [2020-10-11 19:19:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:19:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:19:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-11 19:19:53,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014415842] [2020-10-11 19:19:53,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184767086] [2020-10-11 19:19:53,131 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 [2020-10-11 19:19:53,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 19:19:53,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:19:53,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-11 19:19:53,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:19:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-11 19:19:53,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:19:53,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-10-11 19:19:53,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937194488] [2020-10-11 19:19:53,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 19:19:53,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:19:53,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 19:19:53,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-11 19:19:53,384 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:19:53,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 214 flow. Second operand 9 states. [2020-10-11 19:19:53,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:19:53,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:19:53,385 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:19:53,473 INFO L129 PetriNetUnfolder]: 2/114 cut-off events. [2020-10-11 19:19:53,474 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2020-10-11 19:19:53,476 INFO L80 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 114 events. 2/114 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 1/114 useless extension candidates. Maximal degree in co-relation 167. Up to 8 conditions per place. [2020-10-11 19:19:53,476 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2020-10-11 19:19:53,477 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 79 transitions, 262 flow [2020-10-11 19:19:53,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 19:19:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-11 19:19:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 619 transitions. [2020-10-11 19:19:53,480 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8491083676268861 [2020-10-11 19:19:53,480 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 619 transitions. [2020-10-11 19:19:53,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 619 transitions. [2020-10-11 19:19:53,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:19:53,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 619 transitions. [2020-10-11 19:19:53,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-11 19:19:53,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-11 19:19:53,484 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-11 19:19:53,484 INFO L185 Difference]: Start difference. First operand has 86 places, 75 transitions, 214 flow. Second operand 9 states and 619 transitions. [2020-10-11 19:19:53,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 79 transitions, 262 flow [2020-10-11 19:19:53,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 79 transitions, 256 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-11 19:19:53,489 INFO L241 Difference]: Finished difference. Result has 95 places, 78 transitions, 252 flow [2020-10-11 19:19:53,489 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=252, PETRI_PLACES=95, PETRI_TRANSITIONS=78} [2020-10-11 19:19:53,489 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 24 predicate places. [2020-10-11 19:19:53,490 INFO L481 AbstractCegarLoop]: Abstraction has has 95 places, 78 transitions, 252 flow [2020-10-11 19:19:53,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 19:19:53,490 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:19:53,490 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:19:53,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:19:53,705 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:19:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:19:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1792158494, now seen corresponding path program 4 times [2020-10-11 19:19:53,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:19:53,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175882663] [2020-10-11 19:19:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:19:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:19:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-11 19:19:53,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175882663] [2020-10-11 19:19:53,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888432588] [2020-10-11 19:19:53,831 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 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 [2020-10-11 19:19:53,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 19:19:53,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:19:53,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 19:19:53,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:19:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-11 19:19:53,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:19:53,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-11 19:19:53,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057489240] [2020-10-11 19:19:53,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 19:19:53,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:19:53,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 19:19:53,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-11 19:19:54,131 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:19:54,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 78 transitions, 252 flow. Second operand 11 states. [2020-10-11 19:19:54,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:19:54,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:19:54,133 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:19:54,251 INFO L129 PetriNetUnfolder]: 2/125 cut-off events. [2020-10-11 19:19:54,251 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2020-10-11 19:19:54,253 INFO L80 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 125 events. 2/125 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 1/125 useless extension candidates. Maximal degree in co-relation 201. Up to 8 conditions per place. [2020-10-11 19:19:54,254 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2020-10-11 19:19:54,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 82 transitions, 314 flow [2020-10-11 19:19:54,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 19:19:54,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 19:19:54,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 823 transitions. [2020-10-11 19:19:54,258 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8467078189300411 [2020-10-11 19:19:54,258 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 823 transitions. [2020-10-11 19:19:54,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 823 transitions. [2020-10-11 19:19:54,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:19:54,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 823 transitions. [2020-10-11 19:19:54,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 19:19:54,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 19:19:54,264 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 19:19:54,264 INFO L185 Difference]: Start difference. First operand has 95 places, 78 transitions, 252 flow. Second operand 12 states and 823 transitions. [2020-10-11 19:19:54,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 82 transitions, 314 flow [2020-10-11 19:19:54,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 82 transitions, 296 flow, removed 4 selfloop flow, removed 5 redundant places. [2020-10-11 19:19:54,269 INFO L241 Difference]: Finished difference. Result has 104 places, 81 transitions, 290 flow [2020-10-11 19:19:54,270 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=290, PETRI_PLACES=104, PETRI_TRANSITIONS=81} [2020-10-11 19:19:54,270 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 33 predicate places. [2020-10-11 19:19:54,270 INFO L481 AbstractCegarLoop]: Abstraction has has 104 places, 81 transitions, 290 flow [2020-10-11 19:19:54,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 19:19:54,270 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:19:54,271 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:19:54,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-11 19:19:54,485 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:19:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:19:54,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1299853784, now seen corresponding path program 5 times [2020-10-11 19:19:54,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:19:54,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077084504] [2020-10-11 19:19:54,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:19:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:19:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-11 19:19:54,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077084504] [2020-10-11 19:19:54,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992352246] [2020-10-11 19:19:54,619 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 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 [2020-10-11 19:19:54,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 19:19:54,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:19:54,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 19:19:54,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:19:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-11 19:19:54,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:19:54,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-10-11 19:19:54,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802944271] [2020-10-11 19:19:54,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 19:19:54,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:19:54,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 19:19:54,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-11 19:19:55,076 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:19:55,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 81 transitions, 290 flow. Second operand 13 states. [2020-10-11 19:19:55,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:19:55,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:19:55,077 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:19:55,248 INFO L129 PetriNetUnfolder]: 2/136 cut-off events. [2020-10-11 19:19:55,248 INFO L130 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2020-10-11 19:19:55,249 INFO L80 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 136 events. 2/136 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 1/136 useless extension candidates. Maximal degree in co-relation 235. Up to 8 conditions per place. [2020-10-11 19:19:55,250 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 14 changer transitions 0/85 dead transitions. [2020-10-11 19:19:55,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 85 transitions, 366 flow [2020-10-11 19:19:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 19:19:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-11 19:19:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1027 transitions. [2020-10-11 19:19:55,255 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8452674897119341 [2020-10-11 19:19:55,255 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1027 transitions. [2020-10-11 19:19:55,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1027 transitions. [2020-10-11 19:19:55,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:19:55,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1027 transitions. [2020-10-11 19:19:55,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-11 19:19:55,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-11 19:19:55,262 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-11 19:19:55,263 INFO L185 Difference]: Start difference. First operand has 104 places, 81 transitions, 290 flow. Second operand 15 states and 1027 transitions. [2020-10-11 19:19:55,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 85 transitions, 366 flow [2020-10-11 19:19:55,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 85 transitions, 336 flow, removed 7 selfloop flow, removed 8 redundant places. [2020-10-11 19:19:55,268 INFO L241 Difference]: Finished difference. Result has 113 places, 84 transitions, 328 flow [2020-10-11 19:19:55,269 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=328, PETRI_PLACES=113, PETRI_TRANSITIONS=84} [2020-10-11 19:19:55,269 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 42 predicate places. [2020-10-11 19:19:55,269 INFO L481 AbstractCegarLoop]: Abstraction has has 113 places, 84 transitions, 328 flow [2020-10-11 19:19:55,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 19:19:55,269 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:19:55,270 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:19:55,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:19:55,484 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:19:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:19:55,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1925485278, now seen corresponding path program 6 times [2020-10-11 19:19:55,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:19:55,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943911709] [2020-10-11 19:19:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:19:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:19:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-11 19:19:55,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943911709] [2020-10-11 19:19:55,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374523504] [2020-10-11 19:19:55,634 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 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 [2020-10-11 19:19:55,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 19:19:55,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:19:55,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-11 19:19:55,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:19:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-11 19:19:55,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:19:55,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2020-10-11 19:19:55,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492301691] [2020-10-11 19:19:55,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 19:19:55,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:19:55,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 19:19:55,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-11 19:19:56,590 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 81 [2020-10-11 19:19:56,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 84 transitions, 328 flow. Second operand 18 states. [2020-10-11 19:19:56,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:19:56,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 81 [2020-10-11 19:19:56,591 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:19:59,845 INFO L129 PetriNetUnfolder]: 300/1367 cut-off events. [2020-10-11 19:19:59,846 INFO L130 PetriNetUnfolder]: For 2367/2367 co-relation queries the response was YES. [2020-10-11 19:19:59,854 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3493 conditions, 1367 events. 300/1367 cut-off events. For 2367/2367 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 7785 event pairs, 16 based on Foata normal form. 36/1398 useless extension candidates. Maximal degree in co-relation 3472. Up to 93 conditions per place. [2020-10-11 19:19:59,863 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 136 selfloop transitions, 272 changer transitions 0/461 dead transitions. [2020-10-11 19:19:59,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 461 transitions, 3698 flow [2020-10-11 19:19:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2020-10-11 19:19:59,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-11 19:19:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 8653 transitions. [2020-10-11 19:19:59,890 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7797602955753807 [2020-10-11 19:19:59,890 INFO L72 ComplementDD]: Start complementDD. Operand 137 states and 8653 transitions. [2020-10-11 19:19:59,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 137 states and 8653 transitions. [2020-10-11 19:19:59,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:19:59,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 137 states and 8653 transitions. [2020-10-11 19:19:59,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 138 states. [2020-10-11 19:19:59,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 138 states. [2020-10-11 19:19:59,991 INFO L81 ComplementDD]: Finished complementDD. Result 138 states. [2020-10-11 19:19:59,991 INFO L185 Difference]: Start difference. First operand has 113 places, 84 transitions, 328 flow. Second operand 137 states and 8653 transitions. [2020-10-11 19:19:59,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 461 transitions, 3698 flow [2020-10-11 19:20:00,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 461 transitions, 3362 flow, removed 80 selfloop flow, removed 11 redundant places. [2020-10-11 19:20:00,018 INFO L241 Difference]: Finished difference. Result has 304 places, 337 transitions, 2764 flow [2020-10-11 19:20:00,018 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=137, PETRI_FLOW=2764, PETRI_PLACES=304, PETRI_TRANSITIONS=337} [2020-10-11 19:20:00,019 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 233 predicate places. [2020-10-11 19:20:00,019 INFO L481 AbstractCegarLoop]: Abstraction has has 304 places, 337 transitions, 2764 flow [2020-10-11 19:20:00,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 19:20:00,019 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:20:00,019 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:20:00,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:20:00,235 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:20:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:20:00,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1686101295, now seen corresponding path program 7 times [2020-10-11 19:20:00,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:20:00,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645739679] [2020-10-11 19:20:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:20:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:20:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-10-11 19:20:00,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645739679] [2020-10-11 19:20:00,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9820302] [2020-10-11 19:20:00,357 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 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 [2020-10-11 19:20:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:20:00,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 19:20:00,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:20:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-10-11 19:20:00,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:20:00,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-11 19:20:00,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292542500] [2020-10-11 19:20:00,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 19:20:00,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:20:00,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 19:20:00,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-11 19:20:00,662 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:20:00,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 337 transitions, 2764 flow. Second operand 11 states. [2020-10-11 19:20:00,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:20:00,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:20:00,664 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:20:01,030 INFO L129 PetriNetUnfolder]: 179/983 cut-off events. [2020-10-11 19:20:01,031 INFO L130 PetriNetUnfolder]: For 16791/16862 co-relation queries the response was YES. [2020-10-11 19:20:01,046 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3822 conditions, 983 events. 179/983 cut-off events. For 16791/16862 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4989 event pairs, 29 based on Foata normal form. 51/1019 useless extension candidates. Maximal degree in co-relation 3735. Up to 69 conditions per place. [2020-10-11 19:20:01,054 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 139 changer transitions 0/341 dead transitions. [2020-10-11 19:20:01,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 341 transitions, 3210 flow [2020-10-11 19:20:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 19:20:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 19:20:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 823 transitions. [2020-10-11 19:20:01,057 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8467078189300411 [2020-10-11 19:20:01,057 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 823 transitions. [2020-10-11 19:20:01,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 823 transitions. [2020-10-11 19:20:01,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:20:01,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 823 transitions. [2020-10-11 19:20:01,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 19:20:01,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 19:20:01,061 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 19:20:01,061 INFO L185 Difference]: Start difference. First operand has 304 places, 337 transitions, 2764 flow. Second operand 12 states and 823 transitions. [2020-10-11 19:20:01,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 341 transitions, 3210 flow [2020-10-11 19:20:01,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 341 transitions, 2522 flow, removed 172 selfloop flow, removed 17 redundant places. [2020-10-11 19:20:01,151 INFO L241 Difference]: Finished difference. Result has 301 places, 340 transitions, 2516 flow [2020-10-11 19:20:01,151 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=2076, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2516, PETRI_PLACES=301, PETRI_TRANSITIONS=340} [2020-10-11 19:20:01,152 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 230 predicate places. [2020-10-11 19:20:01,152 INFO L481 AbstractCegarLoop]: Abstraction has has 301 places, 340 transitions, 2516 flow [2020-10-11 19:20:01,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 19:20:01,152 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:20:01,153 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:20:01,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-11 19:20:01,367 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:20:01,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:20:01,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2084776262, now seen corresponding path program 8 times [2020-10-11 19:20:01,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:20:01,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554906250] [2020-10-11 19:20:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:20:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:20:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-11 19:20:01,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554906250] [2020-10-11 19:20:01,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563348900] [2020-10-11 19:20:01,628 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 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 [2020-10-11 19:20:01,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 19:20:01,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:20:01,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 19:20:01,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:20:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-11 19:20:01,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:20:01,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-11 19:20:01,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147113522] [2020-10-11 19:20:01,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 19:20:01,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:20:01,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 19:20:01,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 19:20:02,161 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:20:02,162 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 340 transitions, 2516 flow. Second operand 17 states. [2020-10-11 19:20:02,162 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:20:02,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:20:02,163 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:20:02,707 INFO L129 PetriNetUnfolder]: 203/1095 cut-off events. [2020-10-11 19:20:02,707 INFO L130 PetriNetUnfolder]: For 26501/26668 co-relation queries the response was YES. [2020-10-11 19:20:02,724 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4575 conditions, 1095 events. 203/1095 cut-off events. For 26501/26668 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5563 event pairs, 50 based on Foata normal form. 69/1148 useless extension candidates. Maximal degree in co-relation 4484. Up to 77 conditions per place. [2020-10-11 19:20:02,734 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 139 changer transitions 0/344 dead transitions. [2020-10-11 19:20:02,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 344 transitions, 2914 flow [2020-10-11 19:20:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 19:20:02,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-11 19:20:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1435 transitions. [2020-10-11 19:20:02,738 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8436213991769548 [2020-10-11 19:20:02,738 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1435 transitions. [2020-10-11 19:20:02,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1435 transitions. [2020-10-11 19:20:02,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:20:02,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1435 transitions. [2020-10-11 19:20:02,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-11 19:20:02,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-11 19:20:02,756 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-11 19:20:02,756 INFO L185 Difference]: Start difference. First operand has 301 places, 340 transitions, 2516 flow. Second operand 21 states and 1435 transitions. [2020-10-11 19:20:02,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 344 transitions, 2914 flow [2020-10-11 19:20:02,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 344 transitions, 2600 flow, removed 46 selfloop flow, removed 7 redundant places. [2020-10-11 19:20:02,919 INFO L241 Difference]: Finished difference. Result has 317 places, 343 transitions, 2588 flow [2020-10-11 19:20:02,920 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2588, PETRI_PLACES=317, PETRI_TRANSITIONS=343} [2020-10-11 19:20:02,921 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 246 predicate places. [2020-10-11 19:20:02,921 INFO L481 AbstractCegarLoop]: Abstraction has has 317 places, 343 transitions, 2588 flow [2020-10-11 19:20:02,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 19:20:02,921 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:20:02,922 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:20:03,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:20:03,136 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:20:03,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:20:03,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1136177230, now seen corresponding path program 9 times [2020-10-11 19:20:03,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:20:03,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357138251] [2020-10-11 19:20:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:20:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:20:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-11 19:20:03,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357138251] [2020-10-11 19:20:03,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299014136] [2020-10-11 19:20:03,506 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 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 [2020-10-11 19:20:03,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 19:20:03,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:20:03,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 19:20:03,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:20:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 76 proven. 52 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-11 19:20:03,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:20:03,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2020-10-11 19:20:03,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158374094] [2020-10-11 19:20:03,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 19:20:03,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:20:03,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 19:20:03,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-10-11 19:20:05,923 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 81 [2020-10-11 19:20:05,925 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 343 transitions, 2588 flow. Second operand 26 states. [2020-10-11 19:20:05,925 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:20:05,925 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 81 [2020-10-11 19:20:05,925 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:20:18,973 INFO L129 PetriNetUnfolder]: 552/2449 cut-off events. [2020-10-11 19:20:18,974 INFO L130 PetriNetUnfolder]: For 72210/72242 co-relation queries the response was YES. [2020-10-11 19:20:19,004 INFO L80 FinitePrefix]: Finished finitePrefix Result has 12919 conditions, 2449 events. 552/2449 cut-off events. For 72210/72242 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 15849 event pairs, 16 based on Foata normal form. 74/2519 useless extension candidates. Maximal degree in co-relation 12825. Up to 197 conditions per place. [2020-10-11 19:20:19,026 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 202 selfloop transitions, 644 changer transitions 0/899 dead transitions. [2020-10-11 19:20:19,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 899 transitions, 17800 flow [2020-10-11 19:20:19,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 323 states. [2020-10-11 19:20:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-11 19:20:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 20263 transitions. [2020-10-11 19:20:19,054 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7744906929633452 [2020-10-11 19:20:19,054 INFO L72 ComplementDD]: Start complementDD. Operand 323 states and 20263 transitions. [2020-10-11 19:20:19,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 323 states and 20263 transitions. [2020-10-11 19:20:19,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:20:19,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 323 states and 20263 transitions. [2020-10-11 19:20:19,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 324 states. [2020-10-11 19:20:19,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 324 states. [2020-10-11 19:20:19,117 INFO L81 ComplementDD]: Finished complementDD. Result 324 states. [2020-10-11 19:20:19,117 INFO L185 Difference]: Start difference. First operand has 317 places, 343 transitions, 2588 flow. Second operand 323 states and 20263 transitions. [2020-10-11 19:20:19,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 899 transitions, 17800 flow [2020-10-11 19:20:19,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 899 transitions, 16568 flow, removed 392 selfloop flow, removed 16 redundant places. [2020-10-11 19:20:19,422 INFO L241 Difference]: Finished difference. Result has 725 places, 709 transitions, 10414 flow [2020-10-11 19:20:19,424 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=2283, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=323, PETRI_FLOW=10414, PETRI_PLACES=725, PETRI_TRANSITIONS=709} [2020-10-11 19:20:19,424 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 654 predicate places. [2020-10-11 19:20:19,424 INFO L481 AbstractCegarLoop]: Abstraction has has 725 places, 709 transitions, 10414 flow [2020-10-11 19:20:19,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 19:20:19,424 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:20:19,425 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:20:19,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:20:19,639 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:20:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:20:19,640 INFO L82 PathProgramCache]: Analyzing trace with hash -2034870165, now seen corresponding path program 10 times [2020-10-11 19:20:19,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:20:19,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265503547] [2020-10-11 19:20:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:20:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:20:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-11 19:20:19,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265503547] [2020-10-11 19:20:19,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832995230] [2020-10-11 19:20:19,826 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 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 [2020-10-11 19:20:19,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 19:20:19,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:20:19,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 19:20:19,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:20:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-11 19:20:20,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:20:20,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-11 19:20:20,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397384690] [2020-10-11 19:20:20,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 19:20:20,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:20:20,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 19:20:20,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-11 19:20:20,401 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:20:20,402 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 725 places, 709 transitions, 10414 flow. Second operand 15 states. [2020-10-11 19:20:20,402 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:20:20,403 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:20:20,403 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:20:21,612 INFO L129 PetriNetUnfolder]: 441/2115 cut-off events. [2020-10-11 19:20:21,612 INFO L130 PetriNetUnfolder]: For 170407/170521 co-relation queries the response was YES. [2020-10-11 19:20:21,670 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14135 conditions, 2115 events. 441/2115 cut-off events. For 170407/170521 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 13085 event pairs, 88 based on Foata normal form. 73/2160 useless extension candidates. Maximal degree in co-relation 13939. Up to 179 conditions per place. [2020-10-11 19:20:21,688 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 325 changer transitions 0/713 dead transitions. [2020-10-11 19:20:21,688 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 742 places, 713 transitions, 11424 flow [2020-10-11 19:20:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 19:20:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-11 19:20:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1231 transitions. [2020-10-11 19:20:21,691 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8443072702331962 [2020-10-11 19:20:21,691 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1231 transitions. [2020-10-11 19:20:21,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1231 transitions. [2020-10-11 19:20:21,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:20:21,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1231 transitions. [2020-10-11 19:20:21,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-11 19:20:21,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-11 19:20:21,696 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-11 19:20:21,696 INFO L185 Difference]: Start difference. First operand has 725 places, 709 transitions, 10414 flow. Second operand 18 states and 1231 transitions. [2020-10-11 19:20:21,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 742 places, 713 transitions, 11424 flow [2020-10-11 19:20:22,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 713 transitions, 5926 flow, removed 2179 selfloop flow, removed 144 redundant places. [2020-10-11 19:20:22,346 INFO L241 Difference]: Finished difference. Result has 601 places, 712 transitions, 5884 flow [2020-10-11 19:20:22,347 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=4916, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5884, PETRI_PLACES=601, PETRI_TRANSITIONS=712} [2020-10-11 19:20:22,347 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 530 predicate places. [2020-10-11 19:20:22,347 INFO L481 AbstractCegarLoop]: Abstraction has has 601 places, 712 transitions, 5884 flow [2020-10-11 19:20:22,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 19:20:22,348 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:20:22,348 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:20:22,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-11 19:20:22,549 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:20:22,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:20:22,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1469097548, now seen corresponding path program 11 times [2020-10-11 19:20:22,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:20:22,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307370743] [2020-10-11 19:20:22,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:20:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:20:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-11 19:20:22,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307370743] [2020-10-11 19:20:22,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680285360] [2020-10-11 19:20:22,797 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 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 [2020-10-11 19:20:22,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 19:20:22,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:20:22,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 19:20:22,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:20:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 15 proven. 126 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-11 19:20:23,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:20:23,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2020-10-11 19:20:23,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120479387] [2020-10-11 19:20:23,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-11 19:20:23,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:20:23,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-11 19:20:23,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2020-10-11 19:20:25,341 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 81 [2020-10-11 19:20:25,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 712 transitions, 5884 flow. Second operand 32 states. [2020-10-11 19:20:25,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:20:25,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 81 [2020-10-11 19:20:25,343 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:21:00,904 INFO L129 PetriNetUnfolder]: 801/3536 cut-off events. [2020-10-11 19:21:00,905 INFO L130 PetriNetUnfolder]: For 447426/447472 co-relation queries the response was YES. [2020-10-11 19:21:00,965 INFO L80 FinitePrefix]: Finished finitePrefix Result has 29195 conditions, 3536 events. 801/3536 cut-off events. For 447426/447472 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 24859 event pairs, 16 based on Foata normal form. 91/3623 useless extension candidates. Maximal degree in co-relation 28996. Up to 256 conditions per place. [2020-10-11 19:21:01,015 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 253 selfloop transitions, 1040 changer transitions 0/1346 dead transitions. [2020-10-11 19:21:01,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1121 places, 1346 transitions, 43704 flow [2020-10-11 19:21:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 521 states. [2020-10-11 19:21:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-11 19:21:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 32599 transitions. [2020-10-11 19:21:01,055 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7724698466860975 [2020-10-11 19:21:01,055 INFO L72 ComplementDD]: Start complementDD. Operand 521 states and 32599 transitions. [2020-10-11 19:21:01,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 521 states and 32599 transitions. [2020-10-11 19:21:01,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:21:01,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 521 states and 32599 transitions. [2020-10-11 19:21:01,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 522 states. [2020-10-11 19:21:01,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 522 states. [2020-10-11 19:21:01,157 INFO L81 ComplementDD]: Finished complementDD. Result 522 states. [2020-10-11 19:21:01,157 INFO L185 Difference]: Start difference. First operand has 601 places, 712 transitions, 5884 flow. Second operand 521 states and 32599 transitions. [2020-10-11 19:21:01,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1121 places, 1346 transitions, 43704 flow [2020-10-11 19:21:02,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1108 places, 1346 transitions, 37360 flow, removed 2834 selfloop flow, removed 13 redundant places. [2020-10-11 19:21:02,247 INFO L241 Difference]: Finished difference. Result has 1237 places, 1105 transitions, 21060 flow [2020-10-11 19:21:02,249 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=5090, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=647, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=521, PETRI_FLOW=21060, PETRI_PLACES=1237, PETRI_TRANSITIONS=1105} [2020-10-11 19:21:02,249 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 1166 predicate places. [2020-10-11 19:21:02,249 INFO L481 AbstractCegarLoop]: Abstraction has has 1237 places, 1105 transitions, 21060 flow [2020-10-11 19:21:02,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-11 19:21:02,250 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:21:02,250 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:21:02,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-11 19:21:02,464 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:21:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:21:02,465 INFO L82 PathProgramCache]: Analyzing trace with hash -361501167, now seen corresponding path program 12 times [2020-10-11 19:21:02,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:21:02,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843335476] [2020-10-11 19:21:02,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:21:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:21:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 17 proven. 175 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2020-10-11 19:21:02,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843335476] [2020-10-11 19:21:02,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983812710] [2020-10-11 19:21:02,802 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 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 [2020-10-11 19:21:03,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 19:21:03,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:21:03,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 19:21:03,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:21:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 13 proven. 405 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-11 19:21:03,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:21:03,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2020-10-11 19:21:03,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927514495] [2020-10-11 19:21:03,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-11 19:21:03,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:21:03,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-11 19:21:03,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 19:21:08,096 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 81 [2020-10-11 19:21:08,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1237 places, 1105 transitions, 21060 flow. Second operand 36 states. [2020-10-11 19:21:08,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:21:08,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 81 [2020-10-11 19:21:08,098 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:21:11,453 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-10-11 19:22:07,109 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-10-11 19:22:22,539 INFO L129 PetriNetUnfolder]: 981/4292 cut-off events. [2020-10-11 19:22:22,540 INFO L130 PetriNetUnfolder]: For 1174182/1174254 co-relation queries the response was YES. [2020-10-11 19:22:22,699 INFO L80 FinitePrefix]: Finished finitePrefix Result has 49016 conditions, 4292 events. 981/4292 cut-off events. For 1174182/1174254 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 31297 event pairs, 20 based on Foata normal form. 117/4404 useless extension candidates. Maximal degree in co-relation 48688. Up to 350 conditions per place. [2020-10-11 19:22:22,750 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 286 selfloop transitions, 1334 changer transitions 0/1673 dead transitions. [2020-10-11 19:22:22,750 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1904 places, 1673 transitions, 76586 flow [2020-10-11 19:22:22,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 668 states. [2020-10-11 19:22:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2020-10-11 19:22:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 41752 transitions. [2020-10-11 19:22:22,793 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7716419013824204 [2020-10-11 19:22:22,793 INFO L72 ComplementDD]: Start complementDD. Operand 668 states and 41752 transitions. [2020-10-11 19:22:22,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 668 states and 41752 transitions. [2020-10-11 19:22:22,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:22:22,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 668 states and 41752 transitions. [2020-10-11 19:22:22,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 669 states. [2020-10-11 19:22:22,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 669 states. [2020-10-11 19:22:22,909 INFO L81 ComplementDD]: Finished complementDD. Result 669 states. [2020-10-11 19:22:22,909 INFO L185 Difference]: Start difference. First operand has 1237 places, 1105 transitions, 21060 flow. Second operand 668 states and 41752 transitions. [2020-10-11 19:22:22,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1904 places, 1673 transitions, 76586 flow [2020-10-11 19:22:27,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1578 places, 1673 transitions, 62200 flow, removed 6142 selfloop flow, removed 326 redundant places. [2020-10-11 19:22:27,833 INFO L241 Difference]: Finished difference. Result has 1725 places, 1399 transitions, 31992 flow [2020-10-11 19:22:27,836 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=8096, PETRI_DIFFERENCE_MINUEND_PLACES=911, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=668, PETRI_FLOW=31992, PETRI_PLACES=1725, PETRI_TRANSITIONS=1399} [2020-10-11 19:22:27,836 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 1654 predicate places. [2020-10-11 19:22:27,836 INFO L481 AbstractCegarLoop]: Abstraction has has 1725 places, 1399 transitions, 31992 flow [2020-10-11 19:22:27,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-11 19:22:27,836 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:22:27,837 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:22:28,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 19:22:28,038 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:22:28,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:22:28,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1882826054, now seen corresponding path program 13 times [2020-10-11 19:22:28,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:22:28,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018939494] [2020-10-11 19:22:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:22:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:22:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 19 proven. 232 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-10-11 19:22:28,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018939494] [2020-10-11 19:22:28,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312804568] [2020-10-11 19:22:28,471 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 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 [2020-10-11 19:22:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:22:28,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 19:22:28,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:22:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 19 proven. 232 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-10-11 19:22:28,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:22:28,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-11 19:22:28,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965160674] [2020-10-11 19:22:28,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 19:22:28,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:22:28,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 19:22:28,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2020-10-11 19:22:29,400 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:22:29,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1725 places, 1399 transitions, 31992 flow. Second operand 21 states. [2020-10-11 19:22:29,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:22:29,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:22:29,402 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:22:33,546 INFO L129 PetriNetUnfolder]: 879/4073 cut-off events. [2020-10-11 19:22:33,546 INFO L130 PetriNetUnfolder]: For 1577513/1577689 co-relation queries the response was YES. [2020-10-11 19:22:33,899 INFO L80 FinitePrefix]: Finished finitePrefix Result has 45882 conditions, 4073 events. 879/4073 cut-off events. For 1577513/1577689 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 28926 event pairs, 157 based on Foata normal form. 76/4115 useless extension candidates. Maximal degree in co-relation 45407. Up to 298 conditions per place. [2020-10-11 19:22:33,946 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 670 changer transitions 0/1403 dead transitions. [2020-10-11 19:22:33,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1751 places, 1403 transitions, 34140 flow [2020-10-11 19:22:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 19:22:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-11 19:22:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1843 transitions. [2020-10-11 19:22:33,952 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8427069044352995 [2020-10-11 19:22:33,952 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1843 transitions. [2020-10-11 19:22:33,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1843 transitions. [2020-10-11 19:22:33,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:22:33,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1843 transitions. [2020-10-11 19:22:33,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-11 19:22:33,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-11 19:22:33,959 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-11 19:22:33,959 INFO L185 Difference]: Start difference. First operand has 1725 places, 1399 transitions, 31992 flow. Second operand 27 states and 1843 transitions. [2020-10-11 19:22:33,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1751 places, 1403 transitions, 34140 flow [2020-10-11 19:22:45,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1231 places, 1403 transitions, 12912 flow, removed 9436 selfloop flow, removed 520 redundant places. [2020-10-11 19:22:45,846 INFO L241 Difference]: Finished difference. Result has 1234 places, 1402 transitions, 12770 flow [2020-10-11 19:22:45,848 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=10764, PETRI_DIFFERENCE_MINUEND_PLACES=1205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=667, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12770, PETRI_PLACES=1234, PETRI_TRANSITIONS=1402} [2020-10-11 19:22:45,848 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 1163 predicate places. [2020-10-11 19:22:45,849 INFO L481 AbstractCegarLoop]: Abstraction has has 1234 places, 1402 transitions, 12770 flow [2020-10-11 19:22:45,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 19:22:45,849 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:22:45,849 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:22:46,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:22:46,050 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:22:46,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:22:46,051 INFO L82 PathProgramCache]: Analyzing trace with hash 196261305, now seen corresponding path program 14 times [2020-10-11 19:22:46,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:22:46,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037169073] [2020-10-11 19:22:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:22:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:22:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-10-11 19:22:46,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037169073] [2020-10-11 19:22:46,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648471141] [2020-10-11 19:22:46,756 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 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 [2020-10-11 19:22:46,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 19:22:46,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:22:46,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 19:22:46,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:22:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-10-11 19:22:47,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:22:47,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-10-11 19:22:47,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895523224] [2020-10-11 19:22:47,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 19:22:47,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:22:47,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 19:22:47,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-10-11 19:22:48,326 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:22:48,327 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1234 places, 1402 transitions, 12770 flow. Second operand 25 states. [2020-10-11 19:22:48,327 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:22:48,327 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:22:48,328 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:22:53,494 INFO L129 PetriNetUnfolder]: 948/4411 cut-off events. [2020-10-11 19:22:53,494 INFO L130 PetriNetUnfolder]: For 1584196/1584444 co-relation queries the response was YES. [2020-10-11 19:22:53,798 INFO L80 FinitePrefix]: Finished finitePrefix Result has 42291 conditions, 4411 events. 948/4411 cut-off events. For 1584196/1584444 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 31611 event pairs, 223 based on Foata normal form. 116/4497 useless extension candidates. Maximal degree in co-relation 41813. Up to 321 conditions per place. [2020-10-11 19:22:53,823 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 670 changer transitions 0/1406 dead transitions. [2020-10-11 19:22:53,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1266 places, 1406 transitions, 14694 flow [2020-10-11 19:22:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 19:22:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-11 19:22:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2251 transitions. [2020-10-11 19:22:53,828 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8421249532360644 [2020-10-11 19:22:53,829 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2251 transitions. [2020-10-11 19:22:53,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2251 transitions. [2020-10-11 19:22:53,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:22:53,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2251 transitions. [2020-10-11 19:22:53,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-11 19:22:53,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-11 19:22:53,836 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-11 19:22:53,836 INFO L185 Difference]: Start difference. First operand has 1234 places, 1402 transitions, 12770 flow. Second operand 33 states and 2251 transitions. [2020-10-11 19:22:53,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1266 places, 1406 transitions, 14694 flow [2020-10-11 19:23:05,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1244 places, 1406 transitions, 12928 flow, removed 259 selfloop flow, removed 22 redundant places. [2020-10-11 19:23:05,149 INFO L241 Difference]: Finished difference. Result has 1247 places, 1405 transitions, 12830 flow [2020-10-11 19:23:05,151 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=11004, PETRI_DIFFERENCE_MINUEND_PLACES=1212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=667, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=12830, PETRI_PLACES=1247, PETRI_TRANSITIONS=1405} [2020-10-11 19:23:05,151 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 1176 predicate places. [2020-10-11 19:23:05,152 INFO L481 AbstractCegarLoop]: Abstraction has has 1247 places, 1405 transitions, 12830 flow [2020-10-11 19:23:05,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 19:23:05,152 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:23:05,152 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:23:05,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 19:23:05,353 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:23:05,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:23:05,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1540952581, now seen corresponding path program 15 times [2020-10-11 19:23:05,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:23:05,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206952268] [2020-10-11 19:23:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:23:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:23:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-10-11 19:23:06,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206952268] [2020-10-11 19:23:06,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732454624] [2020-10-11 19:23:06,137 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 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 [2020-10-11 19:23:06,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-11 19:23:06,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:23:06,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 19:23:06,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:23:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-10-11 19:23:06,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:23:06,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-10-11 19:23:06,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473345048] [2020-10-11 19:23:06,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 19:23:06,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:23:06,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 19:23:06,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-10-11 19:23:07,640 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:23:07,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1247 places, 1405 transitions, 12830 flow. Second operand 27 states. [2020-10-11 19:23:07,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:23:07,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:23:07,643 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:23:13,643 INFO L129 PetriNetUnfolder]: 1017/4720 cut-off events. [2020-10-11 19:23:13,643 INFO L130 PetriNetUnfolder]: For 1633985/1634350 co-relation queries the response was YES. [2020-10-11 19:23:14,198 INFO L80 FinitePrefix]: Finished finitePrefix Result has 43557 conditions, 4720 events. 1017/4720 cut-off events. For 1633985/1634350 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 34166 event pairs, 289 based on Foata normal form. 135/4824 useless extension candidates. Maximal degree in co-relation 43076. Up to 344 conditions per place. [2020-10-11 19:23:14,227 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 673 changer transitions 0/1409 dead transitions. [2020-10-11 19:23:14,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1282 places, 1409 transitions, 14768 flow [2020-10-11 19:23:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 19:23:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-11 19:23:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2455 transitions. [2020-10-11 19:23:14,232 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8419067215363512 [2020-10-11 19:23:14,232 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2455 transitions. [2020-10-11 19:23:14,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2455 transitions. [2020-10-11 19:23:14,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:23:14,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2455 transitions. [2020-10-11 19:23:14,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-11 19:23:14,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-11 19:23:14,237 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-11 19:23:14,237 INFO L185 Difference]: Start difference. First operand has 1247 places, 1405 transitions, 12830 flow. Second operand 36 states and 2455 transitions. [2020-10-11 19:23:14,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1282 places, 1409 transitions, 14768 flow [2020-10-11 19:23:27,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1254 places, 1409 transitions, 13152 flow, removed 175 selfloop flow, removed 28 redundant places. [2020-10-11 19:23:27,971 INFO L241 Difference]: Finished difference. Result has 1257 places, 1408 transitions, 13008 flow [2020-10-11 19:23:27,975 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=11214, PETRI_DIFFERENCE_MINUEND_PLACES=1219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=670, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13008, PETRI_PLACES=1257, PETRI_TRANSITIONS=1408} [2020-10-11 19:23:27,975 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 1186 predicate places. [2020-10-11 19:23:27,975 INFO L481 AbstractCegarLoop]: Abstraction has has 1257 places, 1408 transitions, 13008 flow [2020-10-11 19:23:27,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 19:23:27,975 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:23:27,976 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:23:28,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 19:23:28,193 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:23:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:23:28,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1263663183, now seen corresponding path program 16 times [2020-10-11 19:23:28,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:23:28,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246036531] [2020-10-11 19:23:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:23:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:23:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 237 proven. 297 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2020-10-11 19:23:28,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246036531] [2020-10-11 19:23:28,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146831984] [2020-10-11 19:23:28,773 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 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 [2020-10-11 19:23:28,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 19:23:28,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:23:28,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 19:23:28,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:23:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 237 proven. 297 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2020-10-11 19:23:29,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:23:29,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-10-11 19:23:29,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423013841] [2020-10-11 19:23:29,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 19:23:29,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:23:29,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 19:23:29,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-10-11 19:23:29,735 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:23:29,737 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1257 places, 1408 transitions, 13008 flow. Second operand 23 states. [2020-10-11 19:23:29,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:23:29,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:23:29,737 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:23:35,213 INFO L129 PetriNetUnfolder]: 1086/5027 cut-off events. [2020-10-11 19:23:35,214 INFO L130 PetriNetUnfolder]: For 2378218/2379176 co-relation queries the response was YES. [2020-10-11 19:23:35,642 INFO L80 FinitePrefix]: Finished finitePrefix Result has 48847 conditions, 5027 events. 1086/5027 cut-off events. For 2378218/2379176 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 36713 event pairs, 355 based on Foata normal form. 367/5353 useless extension candidates. Maximal degree in co-relation 48363. Up to 368 conditions per place. [2020-10-11 19:23:35,673 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 673 changer transitions 0/1412 dead transitions. [2020-10-11 19:23:35,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1286 places, 1412 transitions, 15170 flow [2020-10-11 19:23:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 19:23:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-11 19:23:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2047 transitions. [2020-10-11 19:23:35,677 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8423868312757201 [2020-10-11 19:23:35,677 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2047 transitions. [2020-10-11 19:23:35,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2047 transitions. [2020-10-11 19:23:35,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:23:35,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2047 transitions. [2020-10-11 19:23:35,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-11 19:23:35,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-11 19:23:35,682 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-11 19:23:35,682 INFO L185 Difference]: Start difference. First operand has 1257 places, 1408 transitions, 13008 flow. Second operand 30 states and 2047 transitions. [2020-10-11 19:23:35,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1286 places, 1412 transitions, 15170 flow [2020-10-11 19:23:50,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1255 places, 1412 transitions, 13498 flow, removed 178 selfloop flow, removed 31 redundant places. [2020-10-11 19:23:50,833 INFO L241 Difference]: Finished difference. Result has 1258 places, 1411 transitions, 13298 flow [2020-10-11 19:23:50,835 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=11336, PETRI_DIFFERENCE_MINUEND_PLACES=1226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=670, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=13298, PETRI_PLACES=1258, PETRI_TRANSITIONS=1411} [2020-10-11 19:23:50,836 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 1187 predicate places. [2020-10-11 19:23:50,836 INFO L481 AbstractCegarLoop]: Abstraction has has 1258 places, 1411 transitions, 13298 flow [2020-10-11 19:23:50,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 19:23:50,836 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:23:50,837 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:23:51,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:23:51,045 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:23:51,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:23:51,046 INFO L82 PathProgramCache]: Analyzing trace with hash -828887600, now seen corresponding path program 17 times [2020-10-11 19:23:51,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:23:51,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907936520] [2020-10-11 19:23:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:23:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:23:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 237 proven. 370 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2020-10-11 19:23:51,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907936520] [2020-10-11 19:23:51,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406482046] [2020-10-11 19:23:51,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:23:51,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-11 19:23:51,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:23:51,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 19:23:51,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:23:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 237 proven. 370 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2020-10-11 19:23:51,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:23:51,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-10-11 19:23:51,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329070249] [2020-10-11 19:23:51,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 19:23:51,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:23:51,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 19:23:51,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-10-11 19:23:52,811 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:23:52,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1258 places, 1411 transitions, 13298 flow. Second operand 25 states. [2020-10-11 19:23:52,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:23:52,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:23:52,813 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:23:58,946 INFO L129 PetriNetUnfolder]: 1155/5280 cut-off events. [2020-10-11 19:23:58,947 INFO L130 PetriNetUnfolder]: For 2636481/2637561 co-relation queries the response was YES. [2020-10-11 19:23:59,763 INFO L80 FinitePrefix]: Finished finitePrefix Result has 53427 conditions, 5280 events. 1155/5280 cut-off events. For 2636481/2637561 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 38902 event pairs, 421 based on Foata normal form. 383/5617 useless extension candidates. Maximal degree in co-relation 52940. Up to 392 conditions per place. [2020-10-11 19:23:59,799 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 676 changer transitions 0/1415 dead transitions. [2020-10-11 19:23:59,800 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1290 places, 1415 transitions, 15474 flow [2020-10-11 19:23:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 19:23:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-11 19:23:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2251 transitions. [2020-10-11 19:23:59,803 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8421249532360644 [2020-10-11 19:23:59,803 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2251 transitions. [2020-10-11 19:23:59,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2251 transitions. [2020-10-11 19:23:59,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:23:59,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2251 transitions. [2020-10-11 19:23:59,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-11 19:23:59,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-11 19:23:59,810 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-11 19:23:59,810 INFO L185 Difference]: Start difference. First operand has 1258 places, 1411 transitions, 13298 flow. Second operand 33 states and 2251 transitions. [2020-10-11 19:23:59,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1290 places, 1415 transitions, 15474 flow [2020-10-11 19:24:17,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1264 places, 1415 transitions, 13610 flow, removed 262 selfloop flow, removed 26 redundant places. [2020-10-11 19:24:17,864 INFO L241 Difference]: Finished difference. Result has 1267 places, 1414 transitions, 13408 flow [2020-10-11 19:24:17,868 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=11434, PETRI_DIFFERENCE_MINUEND_PLACES=1232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=13408, PETRI_PLACES=1267, PETRI_TRANSITIONS=1414} [2020-10-11 19:24:17,868 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 1196 predicate places. [2020-10-11 19:24:17,869 INFO L481 AbstractCegarLoop]: Abstraction has has 1267 places, 1414 transitions, 13408 flow [2020-10-11 19:24:17,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 19:24:17,869 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:24:17,869 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:24:18,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:24:18,724 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:24:18,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:24:18,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2103395289, now seen corresponding path program 18 times [2020-10-11 19:24:18,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:24:18,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123887253] [2020-10-11 19:24:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:24:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:24:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 237 proven. 451 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2020-10-11 19:24:19,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123887253] [2020-10-11 19:24:19,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538567030] [2020-10-11 19:24:19,681 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 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 [2020-10-11 19:24:20,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-10-11 19:24:20,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:24:20,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 19:24:20,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:24:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 237 proven. 451 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2020-10-11 19:24:20,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:24:20,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-10-11 19:24:20,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654231273] [2020-10-11 19:24:20,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 19:24:20,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:24:20,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 19:24:20,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-10-11 19:24:21,616 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:24:21,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1267 places, 1414 transitions, 13408 flow. Second operand 27 states. [2020-10-11 19:24:21,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:24:21,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:24:21,618 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:24:31,995 INFO L129 PetriNetUnfolder]: 1224/5634 cut-off events. [2020-10-11 19:24:31,995 INFO L130 PetriNetUnfolder]: For 2775927/2777221 co-relation queries the response was YES. [2020-10-11 19:24:32,448 INFO L80 FinitePrefix]: Finished finitePrefix Result has 56666 conditions, 5634 events. 1224/5634 cut-off events. For 2775927/2777221 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 41840 event pairs, 487 based on Foata normal form. 407/5986 useless extension candidates. Maximal degree in co-relation 56176. Up to 429 conditions per place. [2020-10-11 19:24:32,476 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 679 changer transitions 0/1418 dead transitions. [2020-10-11 19:24:32,477 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1302 places, 1418 transitions, 15598 flow [2020-10-11 19:24:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 19:24:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-11 19:24:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2455 transitions. [2020-10-11 19:24:32,480 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8419067215363512 [2020-10-11 19:24:32,480 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2455 transitions. [2020-10-11 19:24:32,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2455 transitions. [2020-10-11 19:24:32,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:24:32,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2455 transitions. [2020-10-11 19:24:32,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-11 19:24:32,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-11 19:24:32,485 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-11 19:24:32,485 INFO L185 Difference]: Start difference. First operand has 1267 places, 1414 transitions, 13408 flow. Second operand 36 states and 2455 transitions. [2020-10-11 19:24:32,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1302 places, 1418 transitions, 15598 flow [2020-10-11 19:24:51,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1274 places, 1418 transitions, 13752 flow, removed 265 selfloop flow, removed 28 redundant places. [2020-10-11 19:24:51,380 INFO L241 Difference]: Finished difference. Result has 1277 places, 1417 transitions, 13548 flow [2020-10-11 19:24:51,383 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=11562, PETRI_DIFFERENCE_MINUEND_PLACES=1239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=676, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13548, PETRI_PLACES=1277, PETRI_TRANSITIONS=1417} [2020-10-11 19:24:51,384 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 1206 predicate places. [2020-10-11 19:24:51,384 INFO L481 AbstractCegarLoop]: Abstraction has has 1277 places, 1417 transitions, 13548 flow [2020-10-11 19:24:51,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 19:24:51,385 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:24:51,385 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:24:51,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:24:51,600 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:24:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:24:51,601 INFO L82 PathProgramCache]: Analyzing trace with hash 125633406, now seen corresponding path program 19 times [2020-10-11 19:24:51,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:24:51,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828968171] [2020-10-11 19:24:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:24:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:24:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 237 proven. 540 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2020-10-11 19:24:52,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828968171] [2020-10-11 19:24:52,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948179097] [2020-10-11 19:24:52,468 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 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 [2020-10-11 19:24:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:24:52,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 19:24:52,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:24:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 237 proven. 540 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2020-10-11 19:24:52,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:24:52,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-10-11 19:24:52,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438162025] [2020-10-11 19:24:52,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 19:24:52,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:24:52,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 19:24:52,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2020-10-11 19:24:53,806 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:24:53,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1277 places, 1417 transitions, 13548 flow. Second operand 29 states. [2020-10-11 19:24:53,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:24:53,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:24:53,808 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:25:00,710 INFO L129 PetriNetUnfolder]: 1293/5906 cut-off events. [2020-10-11 19:25:00,710 INFO L130 PetriNetUnfolder]: For 2911334/2912919 co-relation queries the response was YES. [2020-10-11 19:25:01,801 INFO L80 FinitePrefix]: Finished finitePrefix Result has 59971 conditions, 5906 events. 1293/5906 cut-off events. For 2911334/2912919 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 44406 event pairs, 553 based on Foata normal form. 421/6265 useless extension candidates. Maximal degree in co-relation 59478. Up to 478 conditions per place. [2020-10-11 19:25:01,839 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 682 changer transitions 0/1421 dead transitions. [2020-10-11 19:25:01,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1315 places, 1421 transitions, 15752 flow [2020-10-11 19:25:01,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 19:25:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-11 19:25:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2659 transitions. [2020-10-11 19:25:01,844 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8417220639442862 [2020-10-11 19:25:01,844 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2659 transitions. [2020-10-11 19:25:01,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2659 transitions. [2020-10-11 19:25:01,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:25:01,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2659 transitions. [2020-10-11 19:25:01,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-11 19:25:01,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-11 19:25:01,849 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-11 19:25:01,849 INFO L185 Difference]: Start difference. First operand has 1277 places, 1417 transitions, 13548 flow. Second operand 39 states and 2659 transitions. [2020-10-11 19:25:01,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1315 places, 1421 transitions, 15752 flow [2020-10-11 19:25:25,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1283 places, 1421 transitions, 13864 flow, removed 268 selfloop flow, removed 32 redundant places. [2020-10-11 19:25:25,207 INFO L241 Difference]: Finished difference. Result has 1286 places, 1420 transitions, 13658 flow [2020-10-11 19:25:25,209 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=11660, PETRI_DIFFERENCE_MINUEND_PLACES=1245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=679, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=13658, PETRI_PLACES=1286, PETRI_TRANSITIONS=1420} [2020-10-11 19:25:25,210 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 1215 predicate places. [2020-10-11 19:25:25,210 INFO L481 AbstractCegarLoop]: Abstraction has has 1286 places, 1420 transitions, 13658 flow [2020-10-11 19:25:25,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 19:25:25,210 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:25:25,211 INFO L255 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:25:25,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-11 19:25:25,420 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:25:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:25:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1315177429, now seen corresponding path program 20 times [2020-10-11 19:25:25,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:25:25,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518206499] [2020-10-11 19:25:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:25:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:25:26,045 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2020-10-11 19:25:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1375 backedges. 237 proven. 637 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2020-10-11 19:25:26,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518206499] [2020-10-11 19:25:26,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067448872] [2020-10-11 19:25:26,756 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 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 [2020-10-11 19:25:26,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 19:25:26,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:25:26,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 19:25:26,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:25:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1375 backedges. 237 proven. 637 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2020-10-11 19:25:27,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:25:27,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-10-11 19:25:27,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786091085] [2020-10-11 19:25:27,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 19:25:27,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:25:27,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 19:25:27,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-10-11 19:25:28,312 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-11 19:25:28,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1286 places, 1420 transitions, 13658 flow. Second operand 31 states. [2020-10-11 19:25:28,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:25:28,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-11 19:25:28,314 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:25:35,042 INFO L129 PetriNetUnfolder]: 1362/6178 cut-off events. [2020-10-11 19:25:35,042 INFO L130 PetriNetUnfolder]: For 3071579/3073498 co-relation queries the response was YES. [2020-10-11 19:25:36,314 INFO L80 FinitePrefix]: Finished finitePrefix Result has 63208 conditions, 6178 events. 1362/6178 cut-off events. For 3071579/3073498 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 47125 event pairs, 619 based on Foata normal form. 440/6548 useless extension candidates. Maximal degree in co-relation 62712. Up to 525 conditions per place. [2020-10-11 19:25:36,362 INFO L132 encePairwiseOnDemand]: 76/81 looper letters, 7 selfloop transitions, 685 changer transitions 0/1424 dead transitions. [2020-10-11 19:25:36,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1327 places, 1424 transitions, 15876 flow [2020-10-11 19:25:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 19:25:36,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 19:25:36,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2863 transitions. [2020-10-11 19:25:36,367 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8415637860082305 [2020-10-11 19:25:36,368 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2863 transitions. [2020-10-11 19:25:36,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2863 transitions. [2020-10-11 19:25:36,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:25:36,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2863 transitions. [2020-10-11 19:25:36,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-11 19:25:36,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-11 19:25:36,378 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-11 19:25:36,378 INFO L185 Difference]: Start difference. First operand has 1286 places, 1420 transitions, 13658 flow. Second operand 42 states and 2863 transitions. [2020-10-11 19:25:36,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1327 places, 1424 transitions, 15876 flow [2020-10-11 19:26:01,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1292 places, 1424 transitions, 13976 flow, removed 271 selfloop flow, removed 35 redundant places. [2020-10-11 19:26:01,417 INFO L241 Difference]: Finished difference. Result has 1295 places, 1423 transitions, 13768 flow [2020-10-11 19:26:01,420 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=11758, PETRI_DIFFERENCE_MINUEND_PLACES=1251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=682, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=13768, PETRI_PLACES=1295, PETRI_TRANSITIONS=1423} [2020-10-11 19:26:01,420 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 1224 predicate places. [2020-10-11 19:26:01,421 INFO L481 AbstractCegarLoop]: Abstraction has has 1295 places, 1423 transitions, 13768 flow [2020-10-11 19:26:01,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 19:26:01,421 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:26:01,421 INFO L255 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:26:01,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-11 19:26:01,635 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:26:01,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:26:01,636 INFO L82 PathProgramCache]: Analyzing trace with hash -399283722, now seen corresponding path program 21 times [2020-10-11 19:26:01,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:26:01,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085492577] [2020-10-11 19:26:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:26:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:26:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 249 proven. 742 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2020-10-11 19:26:02,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085492577] [2020-10-11 19:26:02,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184388737] [2020-10-11 19:26:02,838 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 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 [2020-10-11 19:26:03,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-11 19:26:03,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:26:03,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 19:26:03,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:26:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 0 proven. 778 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2020-10-11 19:26:04,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:26:04,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 56 [2020-10-11 19:26:04,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059235797] [2020-10-11 19:26:04,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-11 19:26:04,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:26:04,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-11 19:26:04,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2631, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 19:26:21,868 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 81 [2020-10-11 19:26:21,870 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1295 places, 1423 transitions, 13768 flow. Second operand 56 states. [2020-10-11 19:26:21,871 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:26:21,871 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 81 [2020-10-11 19:26:21,871 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:32:50,056 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 12 Received shutdown request... [2020-10-11 19:33:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1473 states. [2020-10-11 19:33:09,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:33:09,592 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-11 19:33:09,599 WARN L235 ceAbstractionStarter]: Timeout [2020-10-11 19:33:09,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 07:33:09 BasicIcfg [2020-10-11 19:33:09,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 19:33:09,600 INFO L168 Benchmark]: Toolchain (without parser) took 801110.56 ms. Allocated memory was 251.1 MB in the beginning and 5.4 GB in the end (delta: 5.1 GB). Free memory was 206.1 MB in the beginning and 3.4 GB in the end (delta: -3.2 GB). Peak memory consumption was 1.9 GB. Max. memory is 14.2 GB. [2020-10-11 19:33:09,601 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 19:33:09,601 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1075.75 ms. Allocated memory was 251.1 MB in the beginning and 315.1 MB in the end (delta: 64.0 MB). Free memory was 206.1 MB in the beginning and 217.2 MB in the end (delta: -11.1 MB). Peak memory consumption was 63.3 MB. Max. memory is 14.2 GB. [2020-10-11 19:33:09,602 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.40 ms. Allocated memory is still 315.1 MB. Free memory was 217.2 MB in the beginning and 214.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 19:33:09,603 INFO L168 Benchmark]: Boogie Preprocessor took 35.48 ms. Allocated memory is still 315.1 MB. Free memory was 214.7 MB in the beginning and 212.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 19:33:09,603 INFO L168 Benchmark]: RCFGBuilder took 534.91 ms. Allocated memory is still 315.1 MB. Free memory was 212.2 MB in the beginning and 185.1 MB in the end (delta: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 14.2 GB. [2020-10-11 19:33:09,604 INFO L168 Benchmark]: TraceAbstraction took 799392.00 ms. Allocated memory was 315.1 MB in the beginning and 5.4 GB in the end (delta: 5.0 GB). Free memory was 185.1 MB in the beginning and 3.4 GB in the end (delta: -3.2 GB). Peak memory consumption was 1.8 GB. Max. memory is 14.2 GB. [2020-10-11 19:33:09,606 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 1075.75 ms. Allocated memory was 251.1 MB in the beginning and 315.1 MB in the end (delta: 64.0 MB). Free memory was 206.1 MB in the beginning and 217.2 MB in the end (delta: -11.1 MB). Peak memory consumption was 63.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 64.40 ms. Allocated memory is still 315.1 MB. Free memory was 217.2 MB in the beginning and 214.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 35.48 ms. Allocated memory is still 315.1 MB. Free memory was 214.7 MB in the beginning and 212.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 534.91 ms. Allocated memory is still 315.1 MB. Free memory was 212.2 MB in the beginning and 185.1 MB in the end (delta: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 14.2 GB. * TraceAbstraction took 799392.00 ms. Allocated memory was 315.1 MB in the beginning and 5.4 GB in the end (delta: 5.0 GB). Free memory was 185.1 MB in the beginning and 3.4 GB in the end (delta: -3.2 GB). Peak memory consumption was 1.8 GB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 1499 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: 799.2s, OverallIterations: 24, TraceHistogramMax: 14, AutomataDifference: 775.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 203 SDtfs, 7117 SDslu, 3983 SDs, 0 SdLazy, 5412 SolverSat, 2458 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10502 GetRequests, 6826 SyntacticMatches, 0 SemanticMatches, 3675 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565964 ImplicationChecksByTransitivity, 524.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31992occurred in iteration=15, 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: 0.5s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 13.1s InterpolantComputationTime, 7890 NumberOfCodeBlocks, 7730 NumberOfCodeBlocksAsserted, 132 NumberOfCheckSat, 7844 ConstructedInterpolants, 0 QuantifiedInterpolants, 3309760 SizeOfPredicates, 306 NumberOfNonLiveVariables, 7706 ConjunctsInSsa, 328 ConjunctsInUnsatCore, 46 InterpolantComputations, 3 PerfectInterpolantSequences, 13622/24684 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