/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-11.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 20:07:34,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 20:07:34,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 20:07:34,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 20:07:34,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 20:07:34,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 20:07:34,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 20:07:34,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 20:07:34,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 20:07:34,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 20:07:34,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 20:07:34,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 20:07:34,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 20:07:34,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 20:07:34,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 20:07:34,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 20:07:34,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 20:07:34,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 20:07:34,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 20:07:34,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 20:07:34,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 20:07:34,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 20:07:34,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 20:07:34,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 20:07:34,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 20:07:34,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 20:07:34,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 20:07:34,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 20:07:34,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 20:07:34,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 20:07:34,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 20:07:34,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 20:07:34,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 20:07:34,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 20:07:34,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 20:07:34,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 20:07:34,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 20:07:34,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 20:07:34,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 20:07:34,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 20:07:34,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 20:07:34,347 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-05 20:07:34,362 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 20:07:34,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 20:07:34,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 20:07:34,363 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 20:07:34,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 20:07:34,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 20:07:34,364 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 20:07:34,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 20:07:34,364 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 20:07:34,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 20:07:34,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 20:07:34,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 20:07:34,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 20:07:34,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 20:07:34,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 20:07:34,366 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 20:07:34,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 20:07:34,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 20:07:34,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 20:07:34,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 20:07:34,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 20:07:34,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 20:07:34,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 20:07:34,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 20:07:34,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 20:07:34,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 20:07:34,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 20:07:34,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 20:07:34,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 20:07:34,367 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 20:07:34,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 20:07:34,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 20:07:34,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 20:07:34,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 20:07:34,634 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 20:07:34,635 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 20:07:34,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-11.i [2022-12-05 20:07:35,599 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 20:07:35,793 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 20:07:35,794 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-11.i [2022-12-05 20:07:35,810 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c916a47b/8ae29a685aea402aab672f5d84d69813/FLAG8b934ace7 [2022-12-05 20:07:35,826 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c916a47b/8ae29a685aea402aab672f5d84d69813 [2022-12-05 20:07:35,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 20:07:35,829 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 20:07:35,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 20:07:35,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 20:07:35,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 20:07:35,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 08:07:35" (1/1) ... [2022-12-05 20:07:35,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd5ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:35, skipping insertion in model container [2022-12-05 20:07:35,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 08:07:35" (1/1) ... [2022-12-05 20:07:35,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 20:07:35,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 20:07:36,070 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-11.i[30243,30256] [2022-12-05 20:07:36,079 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,079 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,083 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,083 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,087 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,088 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,088 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,088 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,091 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,092 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 20:07:36,100 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 20:07:36,131 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-11.i[30243,30256] [2022-12-05 20:07:36,132 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,132 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,133 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,133 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,134 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,135 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,135 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,135 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,136 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,136 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,137 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 20:07:36,163 INFO L208 MainTranslator]: Completed translation [2022-12-05 20:07:36,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36 WrapperNode [2022-12-05 20:07:36,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 20:07:36,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 20:07:36,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 20:07:36,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 20:07:36,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,192 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,213 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-05 20:07:36,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 20:07:36,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 20:07:36,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 20:07:36,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 20:07:36,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,243 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 20:07:36,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 20:07:36,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 20:07:36,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 20:07:36,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 20:07:36,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:07:36,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-05 20:07:36,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-05 20:07:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-05 20:07:36,319 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-05 20:07:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-05 20:07:36,320 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-05 20:07:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 20:07:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 20:07:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 20:07:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 20:07:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 20:07:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 20:07:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 20:07:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 20:07:36,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 20:07:36,321 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 20:07:36,431 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 20:07:36,432 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 20:07:36,575 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 20:07:36,580 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 20:07:36,580 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-05 20:07:36,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 08:07:36 BoogieIcfgContainer [2022-12-05 20:07:36,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 20:07:36,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 20:07:36,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 20:07:36,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 20:07:36,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 08:07:35" (1/3) ... [2022-12-05 20:07:36,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebe444c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 08:07:36, skipping insertion in model container [2022-12-05 20:07:36,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (2/3) ... [2022-12-05 20:07:36,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebe444c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 08:07:36, skipping insertion in model container [2022-12-05 20:07:36,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 08:07:36" (3/3) ... [2022-12-05 20:07:36,588 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i [2022-12-05 20:07:36,602 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 20:07:36,602 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 20:07:36,602 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 20:07:36,674 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-05 20:07:36,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 196 flow [2022-12-05 20:07:36,750 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-05 20:07:36,751 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 20:07:36,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2022-12-05 20:07:36,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 93 transitions, 196 flow [2022-12-05 20:07:36,760 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 188 flow [2022-12-05 20:07:36,761 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 20:07:36,785 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-05 20:07:36,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 91 transitions, 188 flow [2022-12-05 20:07:36,821 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-05 20:07:36,821 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 20:07:36,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2022-12-05 20:07:36,828 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-05 20:07:36,828 INFO L188 LiptonReduction]: Number of co-enabled transitions 1914 [2022-12-05 20:07:39,901 INFO L203 LiptonReduction]: Total number of compositions: 77 [2022-12-05 20:07:39,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 20:07:39,915 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41ea5aa5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 20:07:39,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 20:07:39,918 INFO L130 PetriNetUnfolder]: 3/12 cut-off events. [2022-12-05 20:07:39,918 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 20:07:39,918 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:07:39,918 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-05 20:07:39,919 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:07:39,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:07:39,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1750465324, now seen corresponding path program 1 times [2022-12-05 20:07:39,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:07:39,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454319913] [2022-12-05 20:07:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:07:39,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:07:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:07:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:40,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:07:40,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454319913] [2022-12-05 20:07:40,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454319913] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:07:40,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:07:40,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 20:07:40,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577878239] [2022-12-05 20:07:40,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:07:40,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 20:07:40,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:07:40,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 20:07:40,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 20:07:40,127 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 14 [2022-12-05 20:07:40,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:40,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:07:40,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 14 [2022-12-05 20:07:40,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:07:40,178 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-12-05 20:07:40,178 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 20:07:40,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 331 event pairs, 20 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 91 conditions per place. [2022-12-05 20:07:40,180 INFO L137 encePairwiseOnDemand]: 10/14 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2022-12-05 20:07:40,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2022-12-05 20:07:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 20:07:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 20:07:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 23 transitions. [2022-12-05 20:07:40,191 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2022-12-05 20:07:40,192 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 23 transitions. [2022-12-05 20:07:40,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2022-12-05 20:07:40,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-05 20:07:40,197 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2022-12-05 20:07:40,198 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2022-12-05 20:07:40,202 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2022-12-05 20:07:40,203 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2022-12-05 20:07:40,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:40,203 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:07:40,203 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:07:40,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 20:07:40,204 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:07:40,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:07:40,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1570150653, now seen corresponding path program 1 times [2022-12-05 20:07:40,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:07:40,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255808253] [2022-12-05 20:07:40,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:07:40,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:07:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:07:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:40,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:07:40,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255808253] [2022-12-05 20:07:40,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255808253] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:07:40,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482699548] [2022-12-05 20:07:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:07:40,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:07:40,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:07:40,309 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:07:40,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 20:07:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:07:40,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-05 20:07:40,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:07:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:40,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:07:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:40,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482699548] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:07:40,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:07:40,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-05 20:07:40,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391453130] [2022-12-05 20:07:40,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:07:40,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 20:07:40,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:07:40,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 20:07:40,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-05 20:07:40,434 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 14 [2022-12-05 20:07:40,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:40,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:07:40,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 14 [2022-12-05 20:07:40,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:07:40,502 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-12-05 20:07:40,503 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 20:07:40,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 203 events. 133/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 443 event pairs, 20 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 471. Up to 64 conditions per place. [2022-12-05 20:07:40,504 INFO L137 encePairwiseOnDemand]: 11/14 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-12-05 20:07:40,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2022-12-05 20:07:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 20:07:40,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 20:07:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 44 transitions. [2022-12-05 20:07:40,520 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2022-12-05 20:07:40,520 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 44 transitions. [2022-12-05 20:07:40,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2022-12-05 20:07:40,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 20:07:40,521 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2022-12-05 20:07:40,521 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2022-12-05 20:07:40,522 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2022-12-05 20:07:40,522 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2022-12-05 20:07:40,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:40,522 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:07:40,522 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-05 20:07:40,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-05 20:07:40,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:07:40,727 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:07:40,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:07:40,728 INFO L85 PathProgramCache]: Analyzing trace with hash 129874156, now seen corresponding path program 2 times [2022-12-05 20:07:40,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:07:40,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223018440] [2022-12-05 20:07:40,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:07:40,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:07:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:07:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:40,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:07:40,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223018440] [2022-12-05 20:07:40,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223018440] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:07:40,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855115014] [2022-12-05 20:07:40,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 20:07:40,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:07:40,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:07:40,855 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:07:40,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 20:07:40,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 20:07:40,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:07:40,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 20:07:40,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:07:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:40,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:07:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:41,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855115014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:07:41,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:07:41,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-05 20:07:41,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143421787] [2022-12-05 20:07:41,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:07:41,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 20:07:41,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:07:41,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 20:07:41,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-05 20:07:41,033 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 14 [2022-12-05 20:07:41,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:41,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:07:41,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 14 [2022-12-05 20:07:41,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:07:41,175 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-12-05 20:07:41,175 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-12-05 20:07:41,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 365 events. 241/365 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 843 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 993. Up to 109 conditions per place. [2022-12-05 20:07:41,178 INFO L137 encePairwiseOnDemand]: 11/14 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-12-05 20:07:41,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2022-12-05 20:07:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 20:07:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 20:07:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 89 transitions. [2022-12-05 20:07:41,181 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2022-12-05 20:07:41,181 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 89 transitions. [2022-12-05 20:07:41,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2022-12-05 20:07:41,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-05 20:07:41,184 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2022-12-05 20:07:41,184 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2022-12-05 20:07:41,184 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2022-12-05 20:07:41,185 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2022-12-05 20:07:41,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:41,185 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:07:41,185 INFO L213 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-05 20:07:41,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 20:07:41,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-05 20:07:41,390 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:07:41,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:07:41,390 INFO L85 PathProgramCache]: Analyzing trace with hash -339398260, now seen corresponding path program 3 times [2022-12-05 20:07:41,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:07:41,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798363148] [2022-12-05 20:07:41,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:07:41,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:07:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:07:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:41,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:07:41,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798363148] [2022-12-05 20:07:41,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798363148] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:07:41,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159893763] [2022-12-05 20:07:41,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 20:07:41,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:07:41,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:07:41,596 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:07:41,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 20:07:41,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-05 20:07:41,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:07:41,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 20:07:41,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:07:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:41,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:07:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:41,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159893763] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:07:41,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:07:41,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-05 20:07:41,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457930305] [2022-12-05 20:07:41,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:07:41,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-05 20:07:41,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:07:41,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-05 20:07:41,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-05 20:07:41,866 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 14 [2022-12-05 20:07:41,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:41,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:07:41,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 14 [2022-12-05 20:07:41,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:07:42,096 INFO L130 PetriNetUnfolder]: 457/689 cut-off events. [2022-12-05 20:07:42,096 INFO L131 PetriNetUnfolder]: For 4203/4203 co-relation queries the response was YES. [2022-12-05 20:07:42,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2140 conditions, 689 events. 457/689 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1640 event pairs, 20 based on Foata normal form. 108/645 useless extension candidates. Maximal degree in co-relation 2118. Up to 190 conditions per place. [2022-12-05 20:07:42,101 INFO L137 encePairwiseOnDemand]: 11/14 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2022-12-05 20:07:42,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 167 transitions, 840 flow [2022-12-05 20:07:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-05 20:07:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-05 20:07:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 179 transitions. [2022-12-05 20:07:42,105 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2022-12-05 20:07:42,105 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 24 states and 179 transitions. [2022-12-05 20:07:42,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 167 transitions, 840 flow [2022-12-05 20:07:42,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 167 transitions, 768 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-12-05 20:07:42,111 INFO L231 Difference]: Finished difference. Result has 71 places, 35 transitions, 266 flow [2022-12-05 20:07:42,111 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=266, PETRI_PLACES=71, PETRI_TRANSITIONS=35} [2022-12-05 20:07:42,112 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 53 predicate places. [2022-12-05 20:07:42,112 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 35 transitions, 266 flow [2022-12-05 20:07:42,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:42,112 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:07:42,112 INFO L213 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-05 20:07:42,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-05 20:07:42,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:07:42,319 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:07:42,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:07:42,320 INFO L85 PathProgramCache]: Analyzing trace with hash -122733876, now seen corresponding path program 4 times [2022-12-05 20:07:42,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:07:42,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013778185] [2022-12-05 20:07:42,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:07:42,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:07:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:07:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:42,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:07:42,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013778185] [2022-12-05 20:07:42,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013778185] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:07:42,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032337324] [2022-12-05 20:07:42,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 20:07:42,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:07:42,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:07:42,662 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:07:42,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 20:07:42,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 20:07:42,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:07:42,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-05 20:07:42,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:07:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:42,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:07:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:43,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032337324] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:07:43,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:07:43,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-12-05 20:07:43,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323880776] [2022-12-05 20:07:43,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:07:43,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 20:07:43,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:07:43,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 20:07:43,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-05 20:07:43,030 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 14 [2022-12-05 20:07:43,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 35 transitions, 266 flow. Second operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:43,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:07:43,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 14 [2022-12-05 20:07:43,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:07:43,237 INFO L130 PetriNetUnfolder]: 493/743 cut-off events. [2022-12-05 20:07:43,237 INFO L131 PetriNetUnfolder]: For 5553/5553 co-relation queries the response was YES. [2022-12-05 20:07:43,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2422 conditions, 743 events. 493/743 cut-off events. For 5553/5553 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1773 event pairs, 20 based on Foata normal form. 18/597 useless extension candidates. Maximal degree in co-relation 2388. Up to 166 conditions per place. [2022-12-05 20:07:43,242 INFO L137 encePairwiseOnDemand]: 11/14 looper letters, 156 selfloop transitions, 25 changer transitions 0/181 dead transitions. [2022-12-05 20:07:43,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 181 transitions, 932 flow [2022-12-05 20:07:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-05 20:07:43,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-05 20:07:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 183 transitions. [2022-12-05 20:07:43,244 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5027472527472527 [2022-12-05 20:07:43,244 INFO L175 Difference]: Start difference. First operand has 71 places, 35 transitions, 266 flow. Second operand 26 states and 183 transitions. [2022-12-05 20:07:43,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 181 transitions, 932 flow [2022-12-05 20:07:43,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 181 transitions, 832 flow, removed 39 selfloop flow, removed 11 redundant places. [2022-12-05 20:07:43,252 INFO L231 Difference]: Finished difference. Result has 87 places, 37 transitions, 242 flow [2022-12-05 20:07:43,253 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=242, PETRI_PLACES=87, PETRI_TRANSITIONS=37} [2022-12-05 20:07:43,253 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 69 predicate places. [2022-12-05 20:07:43,253 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 37 transitions, 242 flow [2022-12-05 20:07:43,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:43,253 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:07:43,253 INFO L213 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2022-12-05 20:07:43,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 20:07:43,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:07:43,458 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:07:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:07:43,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1983165012, now seen corresponding path program 5 times [2022-12-05 20:07:43,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:07:43,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040094147] [2022-12-05 20:07:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:07:43,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:07:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:07:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:44,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:07:44,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040094147] [2022-12-05 20:07:44,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040094147] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:07:44,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366421337] [2022-12-05 20:07:44,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 20:07:44,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:07:44,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:07:44,568 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:07:44,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 20:07:44,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-12-05 20:07:44,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:07:44,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-05 20:07:44,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:07:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:45,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:07:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:46,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366421337] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:07:46,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:07:46,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-12-05 20:07:46,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217220439] [2022-12-05 20:07:46,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:07:46,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-05 20:07:46,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:07:46,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-05 20:07:46,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1048, Invalid=4804, Unknown=0, NotChecked=0, Total=5852 [2022-12-05 20:07:46,770 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 14 [2022-12-05 20:07:46,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 37 transitions, 242 flow. Second operand has 77 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:46,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:07:46,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 14 [2022-12-05 20:07:46,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:08:35,381 INFO L130 PetriNetUnfolder]: 87355/131052 cut-off events. [2022-12-05 20:08:35,382 INFO L131 PetriNetUnfolder]: For 743327/743327 co-relation queries the response was YES. [2022-12-05 20:08:36,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412806 conditions, 131052 events. 87355/131052 cut-off events. For 743327/743327 co-relation queries the response was YES. Maximal size of possible extension queue 2522. Compared 983203 event pairs, 106 based on Foata normal form. 209/98523 useless extension candidates. Maximal degree in co-relation 412770. Up to 27314 conditions per place. [2022-12-05 20:08:36,804 INFO L137 encePairwiseOnDemand]: 9/14 looper letters, 1759 selfloop transitions, 5829 changer transitions 0/7588 dead transitions. [2022-12-05 20:08:36,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 7588 transitions, 67711 flow [2022-12-05 20:08:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 352 states. [2022-12-05 20:08:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2022-12-05 20:08:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 2813 transitions. [2022-12-05 20:08:36,815 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5708198051948052 [2022-12-05 20:08:36,815 INFO L175 Difference]: Start difference. First operand has 87 places, 37 transitions, 242 flow. Second operand 352 states and 2813 transitions. [2022-12-05 20:08:36,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 7588 transitions, 67711 flow [2022-12-05 20:08:43,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 7588 transitions, 54901 flow, removed 2193 selfloop flow, removed 23 redundant places. [2022-12-05 20:08:43,839 INFO L231 Difference]: Finished difference. Result has 443 places, 5866 transitions, 35338 flow [2022-12-05 20:08:43,840 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=352, PETRI_FLOW=35338, PETRI_PLACES=443, PETRI_TRANSITIONS=5866} [2022-12-05 20:08:43,840 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 425 predicate places. [2022-12-05 20:08:43,840 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 5866 transitions, 35338 flow [2022-12-05 20:08:43,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:08:43,841 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:08:43,841 INFO L213 CegarLoopForPetriNet]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:08:43,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-05 20:08:44,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:08:44,048 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:08:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:08:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash 827993679, now seen corresponding path program 1 times [2022-12-05 20:08:44,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:08:44,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160361369] [2022-12-05 20:08:44,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:08:44,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:08:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:08:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:08:45,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:08:45,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160361369] [2022-12-05 20:08:45,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160361369] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:08:45,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644858903] [2022-12-05 20:08:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:08:45,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:08:45,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:08:45,013 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:08:45,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 20:08:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:08:45,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-05 20:08:45,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:08:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 211 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:08:46,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:08:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:08:47,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644858903] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:08:47,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:08:47,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-12-05 20:08:47,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987688854] [2022-12-05 20:08:47,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:08:47,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-05 20:08:47,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:08:47,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-05 20:08:47,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1091, Invalid=5715, Unknown=0, NotChecked=0, Total=6806 [2022-12-05 20:08:47,623 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 14 [2022-12-05 20:08:47,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 5866 transitions, 35338 flow. Second operand has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:08:47,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:08:47,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 14 [2022-12-05 20:08:47,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand