/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 [2020-10-09 18:52:27,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 18:52:27,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 18:52:27,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 18:52:27,028 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 18:52:27,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 18:52:27,031 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 18:52:27,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 18:52:27,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 18:52:27,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 18:52:27,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 18:52:27,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 18:52:27,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 18:52:27,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 18:52:27,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 18:52:27,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 18:52:27,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 18:52:27,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 18:52:27,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 18:52:27,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 18:52:27,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 18:52:27,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 18:52:27,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 18:52:27,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 18:52:27,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 18:52:27,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 18:52:27,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 18:52:27,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 18:52:27,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 18:52:27,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 18:52:27,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 18:52:27,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 18:52:27,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 18:52:27,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 18:52:27,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 18:52:27,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 18:52:27,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 18:52:27,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 18:52:27,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 18:52:27,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 18:52:27,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 18:52:27,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 18:52:27,091 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 18:52:27,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 18:52:27,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 18:52:27,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 18:52:27,093 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 18:52:27,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 18:52:27,094 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 18:52:27,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 18:52:27,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 18:52:27,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 18:52:27,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 18:52:27,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 18:52:27,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 18:52:27,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 18:52:27,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 18:52:27,097 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 18:52:27,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 18:52:27,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 18:52:27,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 18:52:27,098 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 18:52:27,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 18:52:27,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 18:52:27,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 18:52:27,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 18:52:27,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 18:52:27,099 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 18:52:27,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 18:52:27,100 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 18:52:27,100 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 18:52:27,100 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 18:52:27,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 18:52:27,467 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 18:52:27,471 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 18:52:27,473 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 18:52:27,475 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 18:52:27,476 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-09 18:52:27,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ccee4d5a/84921e11114d44beb913d52338dd2e67/FLAG407aeba0b [2020-10-09 18:52:28,102 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 18:52:28,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-09 18:52:28,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ccee4d5a/84921e11114d44beb913d52338dd2e67/FLAG407aeba0b [2020-10-09 18:52:28,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ccee4d5a/84921e11114d44beb913d52338dd2e67 [2020-10-09 18:52:28,353 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 18:52:28,355 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 18:52:28,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 18:52:28,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 18:52:28,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 18:52:28,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:52:28" (1/1) ... [2020-10-09 18:52:28,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@463ba846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:28, skipping insertion in model container [2020-10-09 18:52:28,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:52:28" (1/1) ... [2020-10-09 18:52:28,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 18:52:28,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 18:52:29,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:52:29,155 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 18:52:29,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:52:29,545 INFO L208 MainTranslator]: Completed translation [2020-10-09 18:52:29,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:29 WrapperNode [2020-10-09 18:52:29,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 18:52:29,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 18:52:29,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 18:52:29,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 18:52:29,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:29" (1/1) ... [2020-10-09 18:52:29,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:29" (1/1) ... [2020-10-09 18:52:29,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 18:52:29,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 18:52:29,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 18:52:29,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 18:52:29,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:29" (1/1) ... [2020-10-09 18:52:29,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:29" (1/1) ... [2020-10-09 18:52:29,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:29" (1/1) ... [2020-10-09 18:52:29,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:29" (1/1) ... [2020-10-09 18:52:29,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:29" (1/1) ... [2020-10-09 18:52:29,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:29" (1/1) ... [2020-10-09 18:52:29,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:29" (1/1) ... [2020-10-09 18:52:29,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 18:52:29,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 18:52:29,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 18:52:29,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 18:52:29,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 18:52:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 18:52:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 18:52:29,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-09 18:52:29,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 18:52:29,778 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-09 18:52:29,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-10-09 18:52:29,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-10-09 18:52:29,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-09 18:52:29,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 18:52:29,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 18:52:29,782 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 18:52:30,213 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 18:52:30,213 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 18:52:30,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:52:30 BoogieIcfgContainer [2020-10-09 18:52:30,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 18:52:30,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 18:52:30,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 18:52:30,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 18:52:30,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 06:52:28" (1/3) ... [2020-10-09 18:52:30,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23109f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:52:30, skipping insertion in model container [2020-10-09 18:52:30,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:29" (2/3) ... [2020-10-09 18:52:30,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23109f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:52:30, skipping insertion in model container [2020-10-09 18:52:30,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:52:30" (3/3) ... [2020-10-09 18:52:30,230 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-10-09 18:52:30,243 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 18:52:30,250 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 18:52:30,251 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 18:52:30,280 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,280 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,280 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,281 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,281 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,281 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,282 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,282 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,282 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,283 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,283 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,283 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,283 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,284 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,284 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,284 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,284 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,285 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,285 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,285 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,285 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,286 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,286 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,290 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,290 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,291 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,291 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,291 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,291 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,292 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,292 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,292 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,319 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 18:52:30,343 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 18:52:30,343 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 18:52:30,343 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 18:52:30,343 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 18:52:30,343 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 18:52:30,344 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 18:52:30,344 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 18:52:30,344 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 18:52:30,359 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-10-09 18:52:30,411 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-10-09 18:52:30,411 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 18:52:30,421 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. [2020-10-09 18:52:30,421 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 81 transitions, 170 flow [2020-10-09 18:52:30,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 73 transitions, 152 flow [2020-10-09 18:52:30,478 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2020-10-09 18:52:30,478 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 18:52:30,478 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:52:30,479 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] [2020-10-09 18:52:30,480 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:52:30,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:52:30,487 INFO L82 PathProgramCache]: Analyzing trace with hash -330520276, now seen corresponding path program 1 times [2020-10-09 18:52:30,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:52:30,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858007714] [2020-10-09 18:52:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 18:52:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:52:30,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 18:52:30,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:52:30,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:52:30,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858007714] [2020-10-09 18:52:30,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:52:30,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 18:52:30,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538485864] [2020-10-09 18:52:30,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 18:52:30,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:52:30,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 18:52:30,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 18:52:30,713 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 81 [2020-10-09 18:52:30,715 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 152 flow. Second operand 2 states. [2020-10-09 18:52:30,715 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:52:30,715 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 81 [2020-10-09 18:52:30,717 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:52:30,746 INFO L129 PetriNetUnfolder]: 2/67 cut-off events. [2020-10-09 18:52:30,747 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 18:52:30,748 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. [2020-10-09 18:52:30,749 INFO L132 encePairwiseOnDemand]: 77/81 looper letters, 0 selfloop transitions, 0 changer transitions 0/67 dead transitions. [2020-10-09 18:52:30,750 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 140 flow [2020-10-09 18:52:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 18:52:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 18:52:30,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2020-10-09 18:52:30,769 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9382716049382716 [2020-10-09 18:52:30,770 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2020-10-09 18:52:30,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2020-10-09 18:52:30,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:52:30,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2020-10-09 18:52:30,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 18:52:30,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 18:52:30,794 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 18:52:30,796 INFO L185 Difference]: Start difference. First operand has 71 places, 73 transitions, 152 flow. Second operand 2 states and 152 transitions. [2020-10-09 18:52:30,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 140 flow [2020-10-09 18:52:30,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 18:52:30,817 INFO L241 Difference]: Finished difference. Result has 68 places, 67 transitions, 136 flow [2020-10-09 18:52:30,821 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} [2020-10-09 18:52:30,822 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2020-10-09 18:52:30,822 INFO L481 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 136 flow [2020-10-09 18:52:30,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 18:52:30,822 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:52:30,823 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] [2020-10-09 18:52:31,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 18:52:31,026 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:52:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:52:31,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1037567958, now seen corresponding path program 1 times [2020-10-09 18:52:31,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:52:31,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151589601] [2020-10-09 18:52:31,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 18:52:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:52:31,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 18:52:31,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:52:31,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:52:31,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151589601] [2020-10-09 18:52:31,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:52:31,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-09 18:52:31,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123862210] [2020-10-09 18:52:31,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 18:52:31,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:52:31,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 18:52:31,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 18:52:31,267 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 81 [2020-10-09 18:52:31,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 136 flow. Second operand 4 states. [2020-10-09 18:52:31,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:52:31,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 81 [2020-10-09 18:52:31,268 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:52:31,298 INFO L129 PetriNetUnfolder]: 2/77 cut-off events. [2020-10-09 18:52:31,299 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:52:31,299 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 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. 0/74 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2020-10-09 18:52:31,300 INFO L132 encePairwiseOnDemand]: 77/81 looper letters, 4 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2020-10-09 18:52:31,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 156 flow [2020-10-09 18:52:31,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 18:52:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-09 18:52:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 281 transitions. [2020-10-09 18:52:31,304 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8672839506172839 [2020-10-09 18:52:31,305 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 281 transitions. [2020-10-09 18:52:31,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 281 transitions. [2020-10-09 18:52:31,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:52:31,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 281 transitions. [2020-10-09 18:52:31,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-09 18:52:31,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-09 18:52:31,309 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-09 18:52:31,309 INFO L185 Difference]: Start difference. First operand has 68 places, 67 transitions, 136 flow. Second operand 4 states and 281 transitions. [2020-10-09 18:52:31,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 156 flow [2020-10-09 18:52:31,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 156 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 18:52:31,316 INFO L241 Difference]: Finished difference. Result has 73 places, 69 transitions, 158 flow [2020-10-09 18:52:31,316 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2020-10-09 18:52:31,317 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2020-10-09 18:52:31,317 INFO L481 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 158 flow [2020-10-09 18:52:31,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 18:52:31,317 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:52:31,318 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] [2020-10-09 18:52:31,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 18:52:31,520 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:52:31,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:52:31,521 INFO L82 PathProgramCache]: Analyzing trace with hash -752773584, now seen corresponding path program 1 times [2020-10-09 18:52:31,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:52:31,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551595502] [2020-10-09 18:52:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 18:52:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:52:31,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:52:31,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:52:31,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:52:31,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551595502] [2020-10-09 18:52:31,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1366049711] [2020-10-09 18:52:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:52:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:52:31,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 18:52:31,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:31,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:31,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2020-10-09 18:52:31,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2020-10-09 18:52:31,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310191431] [2020-10-09 18:52:31,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 18:52:31,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:52:31,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 18:52:31,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-09 18:52:31,948 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 81 [2020-10-09 18:52:31,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 158 flow. Second operand 4 states. [2020-10-09 18:52:31,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:52:31,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 81 [2020-10-09 18:52:31,949 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:52:31,979 INFO L129 PetriNetUnfolder]: 2/84 cut-off events. [2020-10-09 18:52:31,980 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2020-10-09 18:52:31,981 INFO L80 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 84 events. 2/84 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2020-10-09 18:52:31,982 INFO L132 encePairwiseOnDemand]: 77/81 looper letters, 4 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2020-10-09 18:52:31,982 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 178 flow [2020-10-09 18:52:31,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 18:52:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-09 18:52:31,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 281 transitions. [2020-10-09 18:52:31,985 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8672839506172839 [2020-10-09 18:52:31,986 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 281 transitions. [2020-10-09 18:52:31,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 281 transitions. [2020-10-09 18:52:31,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:52:31,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 281 transitions. [2020-10-09 18:52:31,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-09 18:52:31,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-09 18:52:31,990 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-09 18:52:31,990 INFO L185 Difference]: Start difference. First operand has 73 places, 69 transitions, 158 flow. Second operand 4 states and 281 transitions. [2020-10-09 18:52:31,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 178 flow [2020-10-09 18:52:31,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 71 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 18:52:31,995 INFO L241 Difference]: Finished difference. Result has 78 places, 71 transitions, 180 flow [2020-10-09 18:52:31,995 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2020-10-09 18:52:31,996 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 7 predicate places. [2020-10-09 18:52:31,996 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 180 flow [2020-10-09 18:52:31,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 18:52:31,997 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:52:31,997 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] [2020-10-09 18:52:32,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:52:32,411 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:52:32,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:52:32,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1242257953, now seen corresponding path program 1 times [2020-10-09 18:52:32,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:52:32,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577885238] [2020-10-09 18:52:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-09 18:52:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:52:32,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:52:32,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:32,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:32,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577885238] [2020-10-09 18:52:32,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [561733795] [2020-10-09 18:52:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:52:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:52:32,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:52:32,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:32,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:32,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374623929] [2020-10-09 18:52:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 18:52:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:52:32,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:52:32,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:32,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:32,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 18:52:32,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2020-10-09 18:52:32,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275859481] [2020-10-09 18:52:32,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 18:52:32,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:52:32,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 18:52:32,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-09 18:52:33,014 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 81 [2020-10-09 18:52:33,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 180 flow. Second operand 8 states. [2020-10-09 18:52:33,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:52:33,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 81 [2020-10-09 18:52:33,015 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:52:33,138 INFO L129 PetriNetUnfolder]: 2/94 cut-off events. [2020-10-09 18:52:33,138 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2020-10-09 18:52:33,139 INFO L80 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 94 events. 2/94 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 2/95 useless extension candidates. Maximal degree in co-relation 135. Up to 6 conditions per place. [2020-10-09 18:52:33,140 INFO L132 encePairwiseOnDemand]: 75/81 looper letters, 8 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2020-10-09 18:52:33,140 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 78 transitions, 237 flow [2020-10-09 18:52:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 18:52:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 18:52:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 613 transitions. [2020-10-09 18:52:33,145 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.840877914951989 [2020-10-09 18:52:33,146 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 613 transitions. [2020-10-09 18:52:33,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 613 transitions. [2020-10-09 18:52:33,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:52:33,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 613 transitions. [2020-10-09 18:52:33,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 18:52:33,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 18:52:33,151 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 18:52:33,151 INFO L185 Difference]: Start difference. First operand has 78 places, 71 transitions, 180 flow. Second operand 9 states and 613 transitions. [2020-10-09 18:52:33,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 78 transitions, 237 flow [2020-10-09 18:52:33,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 78 transitions, 237 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 18:52:33,155 INFO L241 Difference]: Finished difference. Result has 89 places, 77 transitions, 234 flow [2020-10-09 18:52:33,155 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=234, PETRI_PLACES=89, PETRI_TRANSITIONS=77} [2020-10-09 18:52:33,156 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 18 predicate places. [2020-10-09 18:52:33,156 INFO L481 AbstractCegarLoop]: Abstraction has has 89 places, 77 transitions, 234 flow [2020-10-09 18:52:33,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 18:52:33,156 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:52:33,157 INFO L255 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 18:52:33,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 18:52:33,763 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:52:33,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:52:33,764 INFO L82 PathProgramCache]: Analyzing trace with hash 179525493, now seen corresponding path program 2 times [2020-10-09 18:52:33,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:52:33,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895050934] [2020-10-09 18:52:33,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-09 18:52:33,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 18:52:33,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:33,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:52:33,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-09 18:52:33,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-09 18:52:33,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895050934] [2020-10-09 18:52:33,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1475444320] [2020-10-09 18:52:33,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:52:34,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 18:52:34,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:34,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:52:34,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-09 18:52:34,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-09 18:52:34,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698757529] [2020-10-09 18:52:34,170 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 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 [2020-10-09 18:52:34,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 18:52:34,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:34,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:52:34,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-09 18:52:34,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-09 18:52:34,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 18:52:34,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2020-10-09 18:52:34,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539379340] [2020-10-09 18:52:34,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 18:52:34,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:52:34,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 18:52:34,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-09 18:52:34,307 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 81 [2020-10-09 18:52:34,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 77 transitions, 234 flow. Second operand 8 states. [2020-10-09 18:52:34,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:52:34,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 81 [2020-10-09 18:52:34,308 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:52:34,392 INFO L129 PetriNetUnfolder]: 2/107 cut-off events. [2020-10-09 18:52:34,392 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2020-10-09 18:52:34,394 INFO L80 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 107 events. 2/107 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 172. Up to 6 conditions per place. [2020-10-09 18:52:34,395 INFO L132 encePairwiseOnDemand]: 75/81 looper letters, 8 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2020-10-09 18:52:34,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 84 transitions, 291 flow [2020-10-09 18:52:34,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 18:52:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 18:52:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 613 transitions. [2020-10-09 18:52:34,399 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.840877914951989 [2020-10-09 18:52:34,399 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 613 transitions. [2020-10-09 18:52:34,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 613 transitions. [2020-10-09 18:52:34,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:52:34,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 613 transitions. [2020-10-09 18:52:34,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 18:52:34,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 18:52:34,406 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 18:52:34,406 INFO L185 Difference]: Start difference. First operand has 89 places, 77 transitions, 234 flow. Second operand 9 states and 613 transitions. [2020-10-09 18:52:34,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 84 transitions, 291 flow [2020-10-09 18:52:34,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 84 transitions, 289 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 18:52:34,411 INFO L241 Difference]: Finished difference. Result has 99 places, 83 transitions, 286 flow [2020-10-09 18:52:34,411 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=286, PETRI_PLACES=99, PETRI_TRANSITIONS=83} [2020-10-09 18:52:34,412 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 28 predicate places. [2020-10-09 18:52:34,412 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 83 transitions, 286 flow [2020-10-09 18:52:34,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 18:52:34,412 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:52:34,412 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-09 18:52:35,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 18:52:35,028 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:52:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:52:35,029 INFO L82 PathProgramCache]: Analyzing trace with hash 437120591, now seen corresponding path program 3 times [2020-10-09 18:52:35,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:52:35,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508874893] [2020-10-09 18:52:35,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-10-09 18:52:35,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 18:52:35,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:35,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 18:52:35,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-09 18:52:35,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-09 18:52:35,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508874893] [2020-10-09 18:52:35,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [797211513] [2020-10-09 18:52:35,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:52:35,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 18:52:35,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:35,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 18:52:35,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-09 18:52:35,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-09 18:52:35,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022617433] [2020-10-09 18:52:35,625 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 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 [2020-10-09 18:52:35,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 18:52:35,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:35,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 18:52:35,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-09 18:52:35,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-09 18:52:35,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 18:52:35,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2020-10-09 18:52:35,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77552038] [2020-10-09 18:52:35,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 18:52:35,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:52:35,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 18:52:35,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-09 18:52:35,845 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 81 [2020-10-09 18:52:35,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 83 transitions, 286 flow. Second operand 16 states. [2020-10-09 18:52:35,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:52:35,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 81 [2020-10-09 18:52:35,846 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:52:36,092 INFO L129 PetriNetUnfolder]: 2/139 cut-off events. [2020-10-09 18:52:36,093 INFO L130 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2020-10-09 18:52:36,097 INFO L80 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 139 events. 2/139 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 4/142 useless extension candidates. Maximal degree in co-relation 274. Up to 11 conditions per place. [2020-10-09 18:52:36,098 INFO L132 encePairwiseOnDemand]: 75/81 looper letters, 12 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2020-10-09 18:52:36,098 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 100 transitions, 463 flow [2020-10-09 18:52:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 18:52:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-09 18:52:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1423 transitions. [2020-10-09 18:52:36,104 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8365667254556144 [2020-10-09 18:52:36,104 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1423 transitions. [2020-10-09 18:52:36,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1423 transitions. [2020-10-09 18:52:36,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:52:36,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1423 transitions. [2020-10-09 18:52:36,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-09 18:52:36,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-09 18:52:36,113 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-09 18:52:36,114 INFO L185 Difference]: Start difference. First operand has 99 places, 83 transitions, 286 flow. Second operand 21 states and 1423 transitions. [2020-10-09 18:52:36,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 100 transitions, 463 flow [2020-10-09 18:52:36,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 100 transitions, 461 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 18:52:36,119 INFO L241 Difference]: Finished difference. Result has 123 places, 96 transitions, 429 flow [2020-10-09 18:52:36,120 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=429, PETRI_PLACES=123, PETRI_TRANSITIONS=96} [2020-10-09 18:52:36,120 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 52 predicate places. [2020-10-09 18:52:36,120 INFO L481 AbstractCegarLoop]: Abstraction has has 123 places, 96 transitions, 429 flow [2020-10-09 18:52:36,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 18:52:36,121 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:52:36,121 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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] [2020-10-09 18:52:36,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt --rewrite-divk,12 mathsat -unsat_core_generation=3 [2020-10-09 18:52:36,735 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:52:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:52:36,736 INFO L82 PathProgramCache]: Analyzing trace with hash 206346641, now seen corresponding path program 4 times [2020-10-09 18:52:36,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:52:36,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355069699] [2020-10-09 18:52:36,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-10-09 18:52:36,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 18:52:36,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:36,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 18:52:36,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-09 18:52:37,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-09 18:52:37,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355069699] [2020-10-09 18:52:37,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1737425881] [2020-10-09 18:52:37,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:52:37,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 18:52:37,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:37,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 18:52:37,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-09 18:52:37,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-09 18:52:37,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904678942] [2020-10-09 18:52:37,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 18:52:37,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 18:52:37,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:37,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 18:52:37,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-09 18:52:37,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-09 18:52:38,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 18:52:38,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 9, 9, 9, 9] total 46 [2020-10-09 18:52:38,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103266810] [2020-10-09 18:52:38,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-09 18:52:38,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:52:38,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-09 18:52:38,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1727, Unknown=0, NotChecked=0, Total=2070 [2020-10-09 18:52:38,816 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 81 [2020-10-09 18:52:38,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 96 transitions, 429 flow. Second operand 46 states. [2020-10-09 18:52:38,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:52:38,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 81 [2020-10-09 18:52:38,818 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:54:04,855 INFO L129 PetriNetUnfolder]: 2017/6416 cut-off events. [2020-10-09 18:54:04,856 INFO L130 PetriNetUnfolder]: For 21164/21164 co-relation queries the response was YES. [2020-10-09 18:54:04,882 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21954 conditions, 6416 events. 2017/6416 cut-off events. For 21164/21164 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 45725 event pairs, 12 based on Foata normal form. 508/6921 useless extension candidates. Maximal degree in co-relation 21936. Up to 864 conditions per place. [2020-10-09 18:54:04,929 INFO L132 encePairwiseOnDemand]: 69/81 looper letters, 847 selfloop transitions, 1824 changer transitions 0/2722 dead transitions. [2020-10-09 18:54:04,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1003 places, 2722 transitions, 25708 flow [2020-10-09 18:54:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 881 states. [2020-10-09 18:54:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 881 states. [2020-10-09 18:54:04,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 54105 transitions. [2020-10-09 18:54:05,021 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7581872451338967 [2020-10-09 18:54:05,021 INFO L72 ComplementDD]: Start complementDD. Operand 881 states and 54105 transitions. [2020-10-09 18:54:05,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 881 states and 54105 transitions. [2020-10-09 18:54:05,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:54:05,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 881 states and 54105 transitions. [2020-10-09 18:54:05,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 882 states. [2020-10-09 18:54:05,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 882 states. [2020-10-09 18:54:05,259 INFO L81 ComplementDD]: Finished complementDD. Result 882 states. [2020-10-09 18:54:05,259 INFO L185 Difference]: Start difference. First operand has 123 places, 96 transitions, 429 flow. Second operand 881 states and 54105 transitions. [2020-10-09 18:54:05,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1003 places, 2722 transitions, 25708 flow [2020-10-09 18:54:05,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 997 places, 2722 transitions, 24908 flow, removed 280 selfloop flow, removed 6 redundant places. [2020-10-09 18:54:05,414 INFO L241 Difference]: Finished difference. Result has 1352 places, 2016 transitions, 19443 flow [2020-10-09 18:54:05,415 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=881, PETRI_FLOW=19443, PETRI_PLACES=1352, PETRI_TRANSITIONS=2016} [2020-10-09 18:54:05,416 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 1281 predicate places. [2020-10-09 18:54:05,416 INFO L481 AbstractCegarLoop]: Abstraction has has 1352 places, 2016 transitions, 19443 flow [2020-10-09 18:54:05,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-09 18:54:05,416 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:54:05,420 INFO L255 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 7, 7, 7, 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] [2020-10-09 18:54:06,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3,16 cvc4 --incremental --print-success --lang smt --rewrite-divk,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 18:54:06,035 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:54:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:54:06,036 INFO L82 PathProgramCache]: Analyzing trace with hash -372559859, now seen corresponding path program 5 times [2020-10-09 18:54:06,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:54:06,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83251962] [2020-10-09 18:54:06,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-10-09 18:54:06,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-10-09 18:54:06,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:54:06,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 18:54:06,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:54:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-09 18:54:06,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:54:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-09 18:54:07,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83251962] [2020-10-09 18:54:07,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1606741999] [2020-10-09 18:54:07,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:54:07,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-10-09 18:54:07,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:54:07,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 18:54:07,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:54:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-09 18:54:07,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:54:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-09 18:54:07,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703557531] [2020-10-09 18:54:07,387 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 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 [2020-10-09 18:54:07,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-10-09 18:54:07,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:54:07,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 18:54:07,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:54:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-09 18:54:07,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:54:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-09 18:54:07,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 18:54:07,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 32 [2020-10-09 18:54:07,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484527601] [2020-10-09 18:54:07,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-09 18:54:07,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:54:07,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-09 18:54:07,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2020-10-09 18:54:07,726 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 81 [2020-10-09 18:54:07,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1352 places, 2016 transitions, 19443 flow. Second operand 32 states. [2020-10-09 18:54:07,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:54:07,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 81 [2020-10-09 18:54:07,728 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:54:19,424 INFO L129 PetriNetUnfolder]: 2673/11691 cut-off events. [2020-10-09 18:54:19,425 INFO L130 PetriNetUnfolder]: For 2084443/2085357 co-relation queries the response was YES. [2020-10-09 18:54:21,041 INFO L80 FinitePrefix]: Finished finitePrefix Result has 56375 conditions, 11691 events. 2673/11691 cut-off events. For 2084443/2085357 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 98270 event pairs, 81 based on Foata normal form. 92/11739 useless extension candidates. Maximal degree in co-relation 56002. Up to 1262 conditions per place. [2020-10-09 18:54:21,134 INFO L132 encePairwiseOnDemand]: 75/81 looper letters, 450 selfloop transitions, 1980 changer transitions 0/3428 dead transitions. [2020-10-09 18:54:21,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1396 places, 3428 transitions, 37977 flow [2020-10-09 18:54:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-09 18:54:21,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-09 18:54:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3043 transitions. [2020-10-09 18:54:21,141 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8348422496570644 [2020-10-09 18:54:21,141 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3043 transitions. [2020-10-09 18:54:21,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3043 transitions. [2020-10-09 18:54:21,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:54:21,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3043 transitions. [2020-10-09 18:54:21,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 46 states. [2020-10-09 18:54:21,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 46 states. [2020-10-09 18:54:21,161 INFO L81 ComplementDD]: Finished complementDD. Result 46 states. [2020-10-09 18:54:21,161 INFO L185 Difference]: Start difference. First operand has 1352 places, 2016 transitions, 19443 flow. Second operand 45 states and 3043 transitions. [2020-10-09 18:54:21,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1396 places, 3428 transitions, 37977 flow [2020-10-09 18:54:28,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1372 places, 3428 transitions, 35097 flow, removed 816 selfloop flow, removed 24 redundant places. [2020-10-09 18:54:28,857 INFO L241 Difference]: Finished difference. Result has 1381 places, 3116 transitions, 31055 flow [2020-10-09 18:54:28,861 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=17267, PETRI_DIFFERENCE_MINUEND_PLACES=1328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=968, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1004, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=31055, PETRI_PLACES=1381, PETRI_TRANSITIONS=3116} [2020-10-09 18:54:28,861 INFO L341 CegarLoopForPetriNet]: 71 programPoint places, 1310 predicate places. [2020-10-09 18:54:28,862 INFO L481 AbstractCegarLoop]: Abstraction has has 1381 places, 3116 transitions, 31055 flow [2020-10-09 18:54:28,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-09 18:54:28,862 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:54:28,862 INFO L255 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 18:54:29,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:54:29,476 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:54:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:54:29,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1258821779, now seen corresponding path program 6 times [2020-10-09 18:54:29,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:54:29,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555938915] [2020-10-09 18:54:29,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2020-10-09 18:54:29,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-09 18:54:29,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:54:29,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-09 18:54:29,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:54:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 621 proven. 855 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2020-10-09 18:54:30,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:54:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 621 proven. 855 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2020-10-09 18:54:31,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555938915] [2020-10-09 18:54:31,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1960590703] [2020-10-09 18:54:31,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:54:32,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-09 18:54:32,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:54:32,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-09 18:54:32,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:54:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 15 proven. 1184 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-09 18:54:33,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:54:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 15 proven. 1184 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-09 18:54:35,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932642226] [2020-10-09 18:54:35,769 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 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 [2020-10-09 18:54:36,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-09 18:54:36,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:54:36,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-09 18:54:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:54:36,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 621 proven. 855 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2020-10-09 18:54:36,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:54:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 621 proven. 855 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2020-10-09 18:54:37,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 18:54:37,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 33, 33] total 80 [2020-10-09 18:54:37,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169607309] [2020-10-09 18:54:37,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-09 18:54:37,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:54:37,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-09 18:54:37,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=879, Invalid=5441, Unknown=0, NotChecked=0, Total=6320 [2020-10-09 18:54:38,155 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 81 [2020-10-09 18:54:38,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1381 places, 3116 transitions, 31055 flow. Second operand 80 states. [2020-10-09 18:54:38,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:54:38,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 81 [2020-10-09 18:54:38,158 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:54:43,721 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-10-09 18:58:46,256 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 9 Received shutdown request... [2020-10-09 19:05:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2029 states. [2020-10-09 19:05:54,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 mathsat -unsat_core_generation=3,22 cvc4 --incremental --print-success --lang smt --rewrite-divk,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:05:54,917 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-09 19:05:54,924 WARN L235 ceAbstractionStarter]: Timeout [2020-10-09 19:05:54,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 07:05:54 BasicIcfg [2020-10-09 19:05:54,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 19:05:54,926 INFO L168 Benchmark]: Toolchain (without parser) took 806571.29 ms. Allocated memory was 250.6 MB in the beginning and 4.8 GB in the end (delta: 4.6 GB). Free memory was 206.9 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.7 GB. Max. memory is 14.2 GB. [2020-10-09 19:05:54,927 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 250.6 MB. Free memory is still 227.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 19:05:54,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1191.22 ms. Allocated memory was 250.6 MB in the beginning and 311.4 MB in the end (delta: 60.8 MB). Free memory was 206.9 MB in the beginning and 213.5 MB in the end (delta: -6.6 MB). Peak memory consumption was 64.7 MB. Max. memory is 14.2 GB. [2020-10-09 19:05:54,928 INFO L168 Benchmark]: Boogie Procedure Inliner took 103.36 ms. Allocated memory is still 311.4 MB. Free memory was 213.5 MB in the beginning and 211.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 19:05:54,929 INFO L168 Benchmark]: Boogie Preprocessor took 49.40 ms. Allocated memory is still 311.4 MB. Free memory was 211.0 MB in the beginning and 208.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 19:05:54,929 INFO L168 Benchmark]: RCFGBuilder took 513.40 ms. Allocated memory is still 311.4 MB. Free memory was 208.5 MB in the beginning and 181.0 MB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 14.2 GB. [2020-10-09 19:05:54,930 INFO L168 Benchmark]: TraceAbstraction took 804707.63 ms. Allocated memory was 311.4 MB in the beginning and 4.8 GB in the end (delta: 4.5 GB). Free memory was 181.0 MB in the beginning and 2.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 2.6 GB. Max. memory is 14.2 GB. [2020-10-09 19:05:54,934 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 250.6 MB. Free memory is still 227.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 1191.22 ms. Allocated memory was 250.6 MB in the beginning and 311.4 MB in the end (delta: 60.8 MB). Free memory was 206.9 MB in the beginning and 213.5 MB in the end (delta: -6.6 MB). Peak memory consumption was 64.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 103.36 ms. Allocated memory is still 311.4 MB. Free memory was 213.5 MB in the beginning and 211.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 49.40 ms. Allocated memory is still 311.4 MB. Free memory was 211.0 MB in the beginning and 208.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 513.40 ms. Allocated memory is still 311.4 MB. Free memory was 208.5 MB in the beginning and 181.0 MB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 14.2 GB. * TraceAbstraction took 804707.63 ms. Allocated memory was 311.4 MB in the beginning and 4.8 GB in the end (delta: 4.5 GB). Free memory was 181.0 MB in the beginning and 2.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 2.6 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 2068 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: 804.5s, OverallIterations: 9, TraceHistogramMax: 15, AutomataDifference: 786.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 50 SDtfs, 18082 SDslu, 980 SDs, 0 SdLazy, 1808 SolverSat, 5725 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11795 GetRequests, 8644 SyntacticMatches, 69 SemanticMatches, 3081 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547349 ImplicationChecksByTransitivity, 730.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31055occurred in iteration=8, 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: 0.4s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 3080 NumberOfCodeBlocks, 2957 NumberOfCodeBlocksAsserted, 148 NumberOfCheckSat, 6116 ConstructedInterpolants, 0 QuantifiedInterpolants, 2542720 SizeOfPredicates, 211 NumberOfNonLiveVariables, 6247 ConjunctsInSsa, 233 ConjunctsInUnsatCore, 44 InterpolantComputations, 6 PerfectInterpolantSequences, 12650/20536 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