/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 --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 20:13:26,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 20:13:26,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 20:13:26,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 20:13:26,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 20:13:26,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 20:13:26,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 20:13:26,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 20:13:26,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 20:13:26,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 20:13:26,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 20:13:26,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 20:13:26,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 20:13:26,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 20:13:26,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 20:13:26,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 20:13:26,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 20:13:26,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 20:13:26,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 20:13:26,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 20:13:26,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 20:13:26,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 20:13:26,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 20:13:26,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 20:13:26,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 20:13:26,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 20:13:26,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 20:13:26,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 20:13:26,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 20:13:26,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 20:13:26,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 20:13:26,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 20:13:26,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 20:13:26,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 20:13:26,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 20:13:26,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 20:13:26,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 20:13:26,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 20:13:26,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 20:13:26,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 20:13:26,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 20:13:26,125 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 [2022-12-12 20:13:26,154 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 20:13:26,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 20:13:26,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 20:13:26,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 20:13:26,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 20:13:26,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 20:13:26,158 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 20:13:26,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 20:13:26,158 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 20:13:26,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 20:13:26,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 20:13:26,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 20:13:26,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 20:13:26,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 20:13:26,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 20:13:26,160 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 20:13:26,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 20:13:26,160 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 20:13:26,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 20:13:26,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 20:13:26,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 20:13:26,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 20:13:26,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 20:13:26,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 20:13:26,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 20:13:26,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 20:13:26,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 20:13:26,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 20:13:26,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 20:13:26,162 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 20:13:26,162 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-12 20:13:26,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 20:13:26,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 20:13:26,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 20:13:26,487 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 20:13:26,487 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 20:13:26,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2022-12-12 20:13:27,604 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 20:13:27,809 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 20:13:27,810 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2022-12-12 20:13:27,816 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f61fa78eb/46f18d44b70a4539a09c45535c330038/FLAG5faa4ba82 [2022-12-12 20:13:27,826 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f61fa78eb/46f18d44b70a4539a09c45535c330038 [2022-12-12 20:13:27,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 20:13:27,829 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 20:13:27,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 20:13:27,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 20:13:27,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 20:13:27,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 08:13:27" (1/1) ... [2022-12-12 20:13:27,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f941de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:13:27, skipping insertion in model container [2022-12-12 20:13:27,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 08:13:27" (1/1) ... [2022-12-12 20:13:27,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 20:13:27,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 20:13:27,971 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:13:27,975 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:13:27,980 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:13:27,981 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:13:27,982 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:13:27,983 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:13:27,999 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2022-12-12 20:13:28,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 20:13:28,029 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 20:13:28,045 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:13:28,048 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:13:28,050 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:13:28,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:13:28,058 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:13:28,060 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:13:28,071 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2022-12-12 20:13:28,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 20:13:28,090 INFO L208 MainTranslator]: Completed translation [2022-12-12 20:13:28,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:13:28 WrapperNode [2022-12-12 20:13:28,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 20:13:28,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 20:13:28,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 20:13:28,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 20:13:28,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:13:28" (1/1) ... [2022-12-12 20:13:28,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:13:28" (1/1) ... [2022-12-12 20:13:28,158 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 271 [2022-12-12 20:13:28,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 20:13:28,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 20:13:28,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 20:13:28,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 20:13:28,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:13:28" (1/1) ... [2022-12-12 20:13:28,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:13:28" (1/1) ... [2022-12-12 20:13:28,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:13:28" (1/1) ... [2022-12-12 20:13:28,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:13:28" (1/1) ... [2022-12-12 20:13:28,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:13:28" (1/1) ... [2022-12-12 20:13:28,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:13:28" (1/1) ... [2022-12-12 20:13:28,205 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:13:28" (1/1) ... [2022-12-12 20:13:28,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:13:28" (1/1) ... [2022-12-12 20:13:28,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 20:13:28,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 20:13:28,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 20:13:28,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 20:13:28,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:13:28" (1/1) ... [2022-12-12 20:13:28,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 20:13:28,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:13:28,248 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) [2022-12-12 20:13:28,269 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 [2022-12-12 20:13:28,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 20:13:28,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 20:13:28,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 20:13:28,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 20:13:28,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 20:13:28,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 20:13:28,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 20:13:28,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 20:13:28,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 20:13:28,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 20:13:28,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 20:13:28,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 20:13:28,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 20:13:28,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 20:13:28,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 20:13:28,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 20:13:28,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 20:13:28,292 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 20:13:28,437 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 20:13:28,438 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 20:13:28,829 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 20:13:29,063 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 20:13:29,063 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-12 20:13:29,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 08:13:29 BoogieIcfgContainer [2022-12-12 20:13:29,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 20:13:29,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 20:13:29,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 20:13:29,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 20:13:29,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 08:13:27" (1/3) ... [2022-12-12 20:13:29,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736c5032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 08:13:29, skipping insertion in model container [2022-12-12 20:13:29,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:13:28" (2/3) ... [2022-12-12 20:13:29,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736c5032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 08:13:29, skipping insertion in model container [2022-12-12 20:13:29,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 08:13:29" (3/3) ... [2022-12-12 20:13:29,073 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2022-12-12 20:13:29,089 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 20:13:29,089 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 20:13:29,090 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 20:13:29,164 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-12 20:13:29,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 176 transitions, 376 flow [2022-12-12 20:13:29,285 INFO L130 PetriNetUnfolder]: 16/173 cut-off events. [2022-12-12 20:13:29,285 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 20:13:29,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 173 events. 16/173 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 105 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 137. Up to 2 conditions per place. [2022-12-12 20:13:29,291 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 176 transitions, 376 flow [2022-12-12 20:13:29,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 163 transitions, 344 flow [2022-12-12 20:13:29,301 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 20:13:29,323 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 163 transitions, 344 flow [2022-12-12 20:13:29,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 163 transitions, 344 flow [2022-12-12 20:13:29,377 INFO L130 PetriNetUnfolder]: 16/163 cut-off events. [2022-12-12 20:13:29,378 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 20:13:29,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 163 events. 16/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 104 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 137. Up to 2 conditions per place. [2022-12-12 20:13:29,384 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 163 transitions, 344 flow [2022-12-12 20:13:29,384 INFO L226 LiptonReduction]: Number of co-enabled transitions 1320 [2022-12-12 20:13:36,318 INFO L241 LiptonReduction]: Total number of compositions: 137 [2022-12-12 20:13:36,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 20:13:36,336 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;@7722a284, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 20:13:36,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-12 20:13:36,343 INFO L130 PetriNetUnfolder]: 5/25 cut-off events. [2022-12-12 20:13:36,343 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 20:13:36,343 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:13:36,343 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:13:36,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:13:36,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:13:36,347 INFO L85 PathProgramCache]: Analyzing trace with hash 902596479, now seen corresponding path program 1 times [2022-12-12 20:13:36,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:13:36,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438995572] [2022-12-12 20:13:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:13:36,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:13:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:13:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:13:36,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:13:36,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438995572] [2022-12-12 20:13:36,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438995572] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:13:36,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:13:36,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-12 20:13:36,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919766578] [2022-12-12 20:13:36,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:13:36,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 20:13:36,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:13:36,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 20:13:36,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 20:13:36,936 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2022-12-12 20:13:36,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-12-12 20:13:36,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:13:36,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2022-12-12 20:13:36,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:13:37,093 INFO L130 PetriNetUnfolder]: 361/510 cut-off events. [2022-12-12 20:13:37,093 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-12 20:13:37,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 510 events. 361/510 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1620 event pairs, 39 based on Foata normal form. 1/313 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2022-12-12 20:13:37,102 INFO L137 encePairwiseOnDemand]: 21/26 looper letters, 34 selfloop transitions, 4 changer transitions 1/42 dead transitions. [2022-12-12 20:13:37,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 195 flow [2022-12-12 20:13:37,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 20:13:37,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 20:13:37,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2022-12-12 20:13:37,113 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2022-12-12 20:13:37,116 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2022-12-12 20:13:37,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 42 transitions, 195 flow [2022-12-12 20:13:37,119 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 41 transitions, 188 flow [2022-12-12 20:13:37,121 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 41 transitions, 188 flow [2022-12-12 20:13:37,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-12-12 20:13:37,121 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:13:37,121 INFO L214 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] [2022-12-12 20:13:37,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 20:13:37,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:13:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:13:37,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1958732551, now seen corresponding path program 1 times [2022-12-12 20:13:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:13:37,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452038779] [2022-12-12 20:13:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:13:37,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:13:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:13:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:13:37,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:13:37,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452038779] [2022-12-12 20:13:37,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452038779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:13:37,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:13:37,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 20:13:37,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223531485] [2022-12-12 20:13:37,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:13:37,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 20:13:37,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:13:37,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 20:13:37,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 20:13:37,409 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2022-12-12 20:13:37,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 41 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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) [2022-12-12 20:13:37,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:13:37,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2022-12-12 20:13:37,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:13:37,579 INFO L130 PetriNetUnfolder]: 368/529 cut-off events. [2022-12-12 20:13:37,579 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-12-12 20:13:37,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 529 events. 368/529 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1732 event pairs, 49 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 1193. Up to 383 conditions per place. [2022-12-12 20:13:37,584 INFO L137 encePairwiseOnDemand]: 20/26 looper letters, 51 selfloop transitions, 6 changer transitions 4/63 dead transitions. [2022-12-12 20:13:37,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 63 transitions, 410 flow [2022-12-12 20:13:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 20:13:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 20:13:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2022-12-12 20:13:37,589 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2022-12-12 20:13:37,590 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2022-12-12 20:13:37,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 63 transitions, 410 flow [2022-12-12 20:13:37,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 59 transitions, 383 flow [2022-12-12 20:13:37,593 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 59 transitions, 383 flow [2022-12-12 20:13:37,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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) [2022-12-12 20:13:37,593 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:13:37,594 INFO L214 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] [2022-12-12 20:13:37,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 20:13:37,594 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:13:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:13:37,595 INFO L85 PathProgramCache]: Analyzing trace with hash 189302509, now seen corresponding path program 1 times [2022-12-12 20:13:37,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:13:37,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431058138] [2022-12-12 20:13:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:13:37,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:13:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:13:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:13:37,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:13:37,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431058138] [2022-12-12 20:13:37,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431058138] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:13:37,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446017099] [2022-12-12 20:13:37,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:13:37,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:13:37,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:13:37,719 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) [2022-12-12 20:13:37,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 20:13:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:13:37,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 20:13:37,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:13:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:13:37,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:13:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:13:37,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446017099] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 20:13:37,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 20:13:37,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-12 20:13:37,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064288696] [2022-12-12 20:13:37,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:13:37,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 20:13:37,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:13:37,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 20:13:37,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-12 20:13:37,993 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2022-12-12 20:13:37,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 59 transitions, 383 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2022-12-12 20:13:37,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:13:37,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2022-12-12 20:13:37,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:13:38,132 INFO L130 PetriNetUnfolder]: 367/526 cut-off events. [2022-12-12 20:13:38,132 INFO L131 PetriNetUnfolder]: For 251/253 co-relation queries the response was YES. [2022-12-12 20:13:38,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2027 conditions, 526 events. 367/526 cut-off events. For 251/253 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1759 event pairs, 43 based on Foata normal form. 2/374 useless extension candidates. Maximal degree in co-relation 1862. Up to 402 conditions per place. [2022-12-12 20:13:38,136 INFO L137 encePairwiseOnDemand]: 21/26 looper letters, 66 selfloop transitions, 7 changer transitions 0/75 dead transitions. [2022-12-12 20:13:38,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 75 transitions, 625 flow [2022-12-12 20:13:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 20:13:38,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 20:13:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 46 transitions. [2022-12-12 20:13:38,138 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35384615384615387 [2022-12-12 20:13:38,139 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2022-12-12 20:13:38,139 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 75 transitions, 625 flow [2022-12-12 20:13:38,142 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 75 transitions, 625 flow [2022-12-12 20:13:38,143 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 75 transitions, 625 flow [2022-12-12 20:13:38,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2022-12-12 20:13:38,143 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:13:38,143 INFO L214 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] [2022-12-12 20:13:38,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 20:13:38,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:13:38,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:13:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:13:38,351 INFO L85 PathProgramCache]: Analyzing trace with hash 101105753, now seen corresponding path program 1 times [2022-12-12 20:13:38,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:13:38,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634628822] [2022-12-12 20:13:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:13:38,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:13:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:13:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:13:38,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:13:38,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634628822] [2022-12-12 20:13:38,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634628822] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:13:38,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729976248] [2022-12-12 20:13:38,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:13:38,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:13:38,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:13:38,528 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) [2022-12-12 20:13:38,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 20:13:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:13:38,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 20:13:38,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:13:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:13:38,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:13:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:13:38,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729976248] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 20:13:38,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 20:13:38,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-12-12 20:13:38,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422116833] [2022-12-12 20:13:38,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:13:38,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 20:13:38,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:13:38,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 20:13:38,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-12 20:13:38,807 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 20:13:38,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 75 transitions, 625 flow. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2022-12-12 20:13:38,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:13:38,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 20:13:38,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:13:39,009 INFO L130 PetriNetUnfolder]: 410/599 cut-off events. [2022-12-12 20:13:39,010 INFO L131 PetriNetUnfolder]: For 814/814 co-relation queries the response was YES. [2022-12-12 20:13:39,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2781 conditions, 599 events. 410/599 cut-off events. For 814/814 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1895 event pairs, 4 based on Foata normal form. 0/468 useless extension candidates. Maximal degree in co-relation 2558. Up to 437 conditions per place. [2022-12-12 20:13:39,015 INFO L137 encePairwiseOnDemand]: 19/26 looper letters, 113 selfloop transitions, 14 changer transitions 0/128 dead transitions. [2022-12-12 20:13:39,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 128 transitions, 1317 flow [2022-12-12 20:13:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 20:13:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 20:13:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 63 transitions. [2022-12-12 20:13:39,017 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.30288461538461536 [2022-12-12 20:13:39,017 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2022-12-12 20:13:39,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 128 transitions, 1317 flow [2022-12-12 20:13:39,022 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 128 transitions, 1317 flow [2022-12-12 20:13:39,022 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 128 transitions, 1317 flow [2022-12-12 20:13:39,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2022-12-12 20:13:39,023 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:13:39,023 INFO L214 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] [2022-12-12 20:13:39,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 20:13:39,229 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,SelfDestructingSolverStorable3 [2022-12-12 20:13:39,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:13:39,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:13:39,230 INFO L85 PathProgramCache]: Analyzing trace with hash 630920597, now seen corresponding path program 1 times [2022-12-12 20:13:39,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:13:39,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487579844] [2022-12-12 20:13:39,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:13:39,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:13:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:13:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:13:40,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:13:40,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487579844] [2022-12-12 20:13:40,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487579844] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:13:40,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393202908] [2022-12-12 20:13:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:13:40,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:13:40,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:13:40,632 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) [2022-12-12 20:13:40,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 20:13:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:13:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-12 20:13:40,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:13:41,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:13:41,148 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-12-12 20:13:41,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 25 [2022-12-12 20:13:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:13:41,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:13:41,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:13:41,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2022-12-12 20:13:41,528 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2022-12-12 20:13:41,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 37 [2022-12-12 20:13:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:13:41,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393202908] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:13:41,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:13:41,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 26 [2022-12-12 20:13:41,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796762672] [2022-12-12 20:13:41,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:13:41,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 20:13:41,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:13:41,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 20:13:41,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-12-12 20:13:41,748 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 20:13:41,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 128 transitions, 1317 flow. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 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) [2022-12-12 20:13:41,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:13:41,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 20:13:41,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:13:43,700 INFO L130 PetriNetUnfolder]: 1297/1886 cut-off events. [2022-12-12 20:13:43,700 INFO L131 PetriNetUnfolder]: For 3628/3682 co-relation queries the response was YES. [2022-12-12 20:13:43,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10460 conditions, 1886 events. 1297/1886 cut-off events. For 3628/3682 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7623 event pairs, 10 based on Foata normal form. 56/1536 useless extension candidates. Maximal degree in co-relation 5838. Up to 1428 conditions per place. [2022-12-12 20:13:43,715 INFO L137 encePairwiseOnDemand]: 12/26 looper letters, 339 selfloop transitions, 127 changer transitions 6/474 dead transitions. [2022-12-12 20:13:43,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 474 transitions, 5820 flow [2022-12-12 20:13:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 20:13:43,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 20:13:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 214 transitions. [2022-12-12 20:13:43,718 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3741258741258741 [2022-12-12 20:13:43,718 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2022-12-12 20:13:43,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 474 transitions, 5820 flow [2022-12-12 20:13:43,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 468 transitions, 5736 flow [2022-12-12 20:13:43,734 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 468 transitions, 5736 flow [2022-12-12 20:13:43,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 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) [2022-12-12 20:13:43,735 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:13:43,735 INFO L214 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] [2022-12-12 20:13:43,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 20:13:43,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:13:43,941 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:13:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:13:43,941 INFO L85 PathProgramCache]: Analyzing trace with hash 842132095, now seen corresponding path program 2 times [2022-12-12 20:13:43,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:13:43,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522621631] [2022-12-12 20:13:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:13:43,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:13:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:13:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:13:45,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:13:45,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522621631] [2022-12-12 20:13:45,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522621631] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:13:45,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511483619] [2022-12-12 20:13:45,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:13:45,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:13:45,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:13:45,325 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) [2022-12-12 20:13:45,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 20:13:45,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:13:45,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:13:45,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-12 20:13:45,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:13:45,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:13:45,476 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-12 20:13:45,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-12 20:13:45,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:13:45,542 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-12 20:13:45,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-12-12 20:13:45,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:13:45,907 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 20:13:45,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2022-12-12 20:13:46,030 INFO L321 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2022-12-12 20:13:46,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 47 [2022-12-12 20:13:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:13:46,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:13:46,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:13:46,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 174 [2022-12-12 20:13:46,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:13:46,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 74 [2022-12-12 20:13:46,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:13:46,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:13:46,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:13:46,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:13:46,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:13:46,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 25 [2022-12-12 20:13:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:13:47,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511483619] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:13:47,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:13:47,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2022-12-12 20:13:47,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475678542] [2022-12-12 20:13:47,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:13:47,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-12 20:13:47,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:13:47,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-12 20:13:47,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=846, Unknown=4, NotChecked=0, Total=992 [2022-12-12 20:13:47,017 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-12 20:13:47,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 468 transitions, 5736 flow. Second operand has 32 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 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) [2022-12-12 20:13:47,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:13:47,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-12 20:13:47,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:13:50,048 INFO L130 PetriNetUnfolder]: 2061/3032 cut-off events. [2022-12-12 20:13:50,049 INFO L131 PetriNetUnfolder]: For 4229/4229 co-relation queries the response was YES. [2022-12-12 20:13:50,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19935 conditions, 3032 events. 2061/3032 cut-off events. For 4229/4229 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13319 event pairs, 8 based on Foata normal form. 4/2285 useless extension candidates. Maximal degree in co-relation 9580. Up to 2351 conditions per place. [2022-12-12 20:13:50,093 INFO L137 encePairwiseOnDemand]: 11/26 looper letters, 559 selfloop transitions, 217 changer transitions 18/794 dead transitions. [2022-12-12 20:13:50,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 794 transitions, 11233 flow [2022-12-12 20:13:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-12 20:13:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-12 20:13:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 240 transitions. [2022-12-12 20:13:50,095 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32967032967032966 [2022-12-12 20:13:50,096 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 64 predicate places. [2022-12-12 20:13:50,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 794 transitions, 11233 flow [2022-12-12 20:13:50,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 776 transitions, 10951 flow [2022-12-12 20:13:50,116 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 776 transitions, 10951 flow [2022-12-12 20:13:50,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 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) [2022-12-12 20:13:50,117 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:13:50,117 INFO L214 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] [2022-12-12 20:13:50,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-12 20:13:50,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:13:50,323 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:13:50,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:13:50,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1149062677, now seen corresponding path program 3 times [2022-12-12 20:13:50,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:13:50,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757397876] [2022-12-12 20:13:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:13:50,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:13:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:13:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:13:51,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:13:51,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757397876] [2022-12-12 20:13:51,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757397876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:13:51,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106380569] [2022-12-12 20:13:51,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:13:51,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:13:51,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:13:51,890 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) [2022-12-12 20:13:51,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 20:13:52,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 20:13:52,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:13:52,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-12 20:13:52,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:13:52,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:13:52,430 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-12-12 20:13:52,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 25 [2022-12-12 20:13:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:13:52,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:13:52,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:13:52,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 94 [2022-12-12 20:13:52,681 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2022-12-12 20:13:52,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2022-12-12 20:13:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:13:52,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106380569] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:13:52,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:13:52,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 26 [2022-12-12 20:13:52,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142706565] [2022-12-12 20:13:52,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:13:52,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 20:13:52,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:13:52,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 20:13:52,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-12-12 20:13:52,946 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 20:13:52,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 776 transitions, 10951 flow. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 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) [2022-12-12 20:13:52,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:13:52,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 20:13:52,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:13:55,626 INFO L130 PetriNetUnfolder]: 2464/3606 cut-off events. [2022-12-12 20:13:55,627 INFO L131 PetriNetUnfolder]: For 6876/6876 co-relation queries the response was YES. [2022-12-12 20:13:55,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27063 conditions, 3606 events. 2464/3606 cut-off events. For 6876/6876 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16397 event pairs, 8 based on Foata normal form. 1/2712 useless extension candidates. Maximal degree in co-relation 14115. Up to 2856 conditions per place. [2022-12-12 20:13:55,655 INFO L137 encePairwiseOnDemand]: 14/26 looper letters, 781 selfloop transitions, 143 changer transitions 3/947 dead transitions. [2022-12-12 20:13:55,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 947 transitions, 15256 flow [2022-12-12 20:13:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 20:13:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 20:13:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 195 transitions. [2022-12-12 20:13:55,658 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3125 [2022-12-12 20:13:55,659 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 87 predicate places. [2022-12-12 20:13:55,659 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 947 transitions, 15256 flow [2022-12-12 20:13:55,685 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 944 transitions, 15202 flow [2022-12-12 20:13:55,685 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 944 transitions, 15202 flow [2022-12-12 20:13:55,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 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) [2022-12-12 20:13:55,685 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:13:55,686 INFO L214 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] [2022-12-12 20:13:55,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 20:13:55,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:13:55,892 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:13:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:13:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1455157459, now seen corresponding path program 4 times [2022-12-12 20:13:55,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:13:55,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090734984] [2022-12-12 20:13:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:13:55,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:13:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:13:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:13:57,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:13:57,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090734984] [2022-12-12 20:13:57,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090734984] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:13:57,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133197624] [2022-12-12 20:13:57,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:13:57,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:13:57,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:13:57,199 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) [2022-12-12 20:13:57,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 20:13:57,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:13:57,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:13:57,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-12 20:13:57,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:13:57,585 INFO L321 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2022-12-12 20:13:57,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 47 [2022-12-12 20:13:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:13:57,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:13:57,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:13:57,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 94 [2022-12-12 20:13:57,971 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2022-12-12 20:13:57,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2022-12-12 20:13:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:13:58,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133197624] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:13:58,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:13:58,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 25 [2022-12-12 20:13:58,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278998750] [2022-12-12 20:13:58,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:13:58,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 20:13:58,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:13:58,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 20:13:58,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-12-12 20:13:58,107 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-12 20:13:58,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 944 transitions, 15202 flow. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 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) [2022-12-12 20:13:58,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:13:58,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-12 20:13:58,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:14:01,108 INFO L130 PetriNetUnfolder]: 3366/4969 cut-off events. [2022-12-12 20:14:01,108 INFO L131 PetriNetUnfolder]: For 8631/8631 co-relation queries the response was YES. [2022-12-12 20:14:01,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42462 conditions, 4969 events. 3366/4969 cut-off events. For 8631/8631 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24690 event pairs, 10 based on Foata normal form. 3/3661 useless extension candidates. Maximal degree in co-relation 23715. Up to 4088 conditions per place. [2022-12-12 20:14:01,141 INFO L137 encePairwiseOnDemand]: 12/26 looper letters, 1076 selfloop transitions, 312 changer transitions 9/1397 dead transitions. [2022-12-12 20:14:01,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 1397 transitions, 25228 flow [2022-12-12 20:14:01,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-12 20:14:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-12-12 20:14:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 286 transitions. [2022-12-12 20:14:01,143 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2558139534883721 [2022-12-12 20:14:01,144 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 129 predicate places. [2022-12-12 20:14:01,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 1397 transitions, 25228 flow [2022-12-12 20:14:01,183 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 1388 transitions, 25048 flow [2022-12-12 20:14:01,183 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 1388 transitions, 25048 flow [2022-12-12 20:14:01,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 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) [2022-12-12 20:14:01,184 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:14:01,184 INFO L214 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] [2022-12-12 20:14:01,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 20:14:01,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:14:01,390 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:14:01,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:14:01,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1764049147, now seen corresponding path program 5 times [2022-12-12 20:14:01,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:14:01,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052448823] [2022-12-12 20:14:01,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:14:01,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:14:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:14:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:14:02,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:14:02,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052448823] [2022-12-12 20:14:02,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052448823] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:14:02,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824434697] [2022-12-12 20:14:02,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:14:02,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:14:02,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:14:02,364 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:14:02,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 20:14:02,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 20:14:02,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:14:02,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 20:14:02,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:14:02,724 INFO L321 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2022-12-12 20:14:02,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 47 [2022-12-12 20:14:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:14:02,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:14:03,049 INFO L321 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2022-12-12 20:14:03,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 29 [2022-12-12 20:14:03,080 INFO L321 Elim1Store]: treesize reduction 49, result has 32.9 percent of original size [2022-12-12 20:14:03,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 34 [2022-12-12 20:14:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:14:03,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824434697] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:14:03,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:14:03,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 23 [2022-12-12 20:14:03,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638726519] [2022-12-12 20:14:03,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:14:03,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 20:14:03,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:14:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 20:14:03,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-12-12 20:14:03,144 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 20:14:03,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 1388 transitions, 25048 flow. Second operand has 25 states, 25 states have (on average 3.52) internal successors, (88), 25 states have internal predecessors, (88), 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) [2022-12-12 20:14:03,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:14:03,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 20:14:03,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:14:05,726 INFO L130 PetriNetUnfolder]: 4465/6770 cut-off events. [2022-12-12 20:14:05,726 INFO L131 PetriNetUnfolder]: For 15720/15720 co-relation queries the response was YES. [2022-12-12 20:14:05,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64018 conditions, 6770 events. 4465/6770 cut-off events. For 15720/15720 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37562 event pairs, 17 based on Foata normal form. 3/4992 useless extension candidates. Maximal degree in co-relation 32139. Up to 5635 conditions per place. [2022-12-12 20:14:05,763 INFO L137 encePairwiseOnDemand]: 12/26 looper letters, 1528 selfloop transitions, 583 changer transitions 47/2191 dead transitions. [2022-12-12 20:14:05,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 2191 transitions, 44177 flow [2022-12-12 20:14:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 20:14:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 20:14:05,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 199 transitions. [2022-12-12 20:14:05,765 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3189102564102564 [2022-12-12 20:14:05,765 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 152 predicate places. [2022-12-12 20:14:05,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 2191 transitions, 44177 flow [2022-12-12 20:14:05,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 2144 transitions, 43219 flow [2022-12-12 20:14:05,813 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 2144 transitions, 43219 flow [2022-12-12 20:14:05,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.52) internal successors, (88), 25 states have internal predecessors, (88), 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) [2022-12-12 20:14:05,813 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:14:05,813 INFO L214 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] [2022-12-12 20:14:05,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 20:14:06,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:14:06,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:14:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:14:06,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1538710115, now seen corresponding path program 6 times [2022-12-12 20:14:06,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:14:06,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383432190] [2022-12-12 20:14:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:14:06,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:14:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:14:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:14:07,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:14:07,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383432190] [2022-12-12 20:14:07,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383432190] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:14:07,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201994112] [2022-12-12 20:14:07,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:14:07,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:14:07,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:14:07,359 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:14:07,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 20:14:07,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 20:14:07,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:14:07,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-12 20:14:07,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:14:07,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:14:07,866 INFO L321 Elim1Store]: treesize reduction 45, result has 33.8 percent of original size [2022-12-12 20:14:07,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 33 [2022-12-12 20:14:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:14:07,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:14:08,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:14:08,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2022-12-12 20:14:08,120 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2022-12-12 20:14:08,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 37 [2022-12-12 20:14:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:14:08,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201994112] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:14:08,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:14:08,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2022-12-12 20:14:08,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555413052] [2022-12-12 20:14:08,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:14:08,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 20:14:08,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:14:08,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 20:14:08,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-12-12 20:14:08,315 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-12 20:14:08,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 2144 transitions, 43219 flow. Second operand has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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) [2022-12-12 20:14:08,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:14:08,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-12 20:14:08,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:14:12,108 INFO L130 PetriNetUnfolder]: 4393/6756 cut-off events. [2022-12-12 20:14:12,108 INFO L131 PetriNetUnfolder]: For 16860/16860 co-relation queries the response was YES. [2022-12-12 20:14:12,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70645 conditions, 6756 events. 4393/6756 cut-off events. For 16860/16860 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 38564 event pairs, 4 based on Foata normal form. 3/5090 useless extension candidates. Maximal degree in co-relation 34704. Up to 5643 conditions per place. [2022-12-12 20:14:12,146 INFO L137 encePairwiseOnDemand]: 12/26 looper letters, 1949 selfloop transitions, 287 changer transitions 39/2275 dead transitions. [2022-12-12 20:14:12,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 2275 transitions, 50415 flow [2022-12-12 20:14:12,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-12 20:14:12,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-12 20:14:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 179 transitions. [2022-12-12 20:14:12,148 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.24587912087912087 [2022-12-12 20:14:12,148 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 179 predicate places. [2022-12-12 20:14:12,148 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 2275 transitions, 50415 flow [2022-12-12 20:14:12,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 2236 transitions, 49518 flow [2022-12-12 20:14:12,208 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 2236 transitions, 49518 flow [2022-12-12 20:14:12,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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) [2022-12-12 20:14:12,208 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:14:12,208 INFO L214 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] [2022-12-12 20:14:12,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-12 20:14:12,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-12 20:14:12,409 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:14:12,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:14:12,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1315919483, now seen corresponding path program 7 times [2022-12-12 20:14:12,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:14:12,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785805870] [2022-12-12 20:14:12,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:14:12,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:14:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:14:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:14:13,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:14:13,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785805870] [2022-12-12 20:14:13,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785805870] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:14:13,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264456623] [2022-12-12 20:14:13,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:14:13,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:14:13,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:14:13,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:14:13,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 20:14:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:14:13,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-12 20:14:13,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:14:13,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:14:13,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:14:13,772 INFO L321 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2022-12-12 20:14:13,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 21 [2022-12-12 20:14:13,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:14:13,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:14:13,918 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-12-12 20:14:13,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2022-12-12 20:14:14,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:14:14,363 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 20:14:14,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2022-12-12 20:14:14,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:14:14,478 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 20:14:14,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2022-12-12 20:14:14,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:14:14,609 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-12-12 20:14:14,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 25 [2022-12-12 20:14:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:14:14,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:14:14,844 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (* 4 c_~M~0))) (let ((.cse1 (+ .cse4 c_~B~0.offset)) (.cse2 (+ c_~A~0.offset .cse4))) (and (forall ((v_ArrVal_524 (Array Int Int)) (v_ArrVal_525 (Array Int Int))) (<= c_~res1~0 (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_524) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_525))) (+ (select (select .cse0 c_~B~0.base) .cse1) c_~res2~0 (select (select .cse0 c_~A~0.base) .cse2))))) (forall ((v_ArrVal_524 (Array Int Int)) (v_ArrVal_525 (Array Int Int))) (< (let ((.cse3 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_524) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_525))) (+ (select (select .cse3 c_~B~0.base) .cse1) c_~res2~0 (select (select .cse3 c_~A~0.base) .cse2))) (+ c_~res1~0 1)))))) is different from false [2022-12-12 20:14:14,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:14:14,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1526 treesize of output 970 [2022-12-12 20:14:14,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:14:14,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 886 treesize of output 702 [2022-12-12 20:14:14,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:14:14,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 694 treesize of output 606 [2022-12-12 20:14:18,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:14:18,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:14:18,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:14:18,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:14:18,945 INFO L321 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2022-12-12 20:14:18,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 30 [2022-12-12 20:14:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:14:19,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264456623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:14:19,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:14:19,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2022-12-12 20:14:19,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78644297] [2022-12-12 20:14:19,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:14:19,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 20:14:19,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:14:19,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 20:14:19,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=758, Unknown=7, NotChecked=56, Total=930 [2022-12-12 20:14:19,354 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 20:14:19,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 2236 transitions, 49518 flow. Second operand has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 31 states have internal predecessors, (95), 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) [2022-12-12 20:14:19,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:14:19,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 20:14:19,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:14:26,256 INFO L130 PetriNetUnfolder]: 4955/7577 cut-off events. [2022-12-12 20:14:26,257 INFO L131 PetriNetUnfolder]: For 24052/24052 co-relation queries the response was YES. [2022-12-12 20:14:26,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85973 conditions, 7577 events. 4955/7577 cut-off events. For 24052/24052 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 43806 event pairs, 7 based on Foata normal form. 2/5739 useless extension candidates. Maximal degree in co-relation 44900. Up to 6381 conditions per place. [2022-12-12 20:14:26,306 INFO L137 encePairwiseOnDemand]: 13/26 looper letters, 2161 selfloop transitions, 311 changer transitions 7/2512 dead transitions. [2022-12-12 20:14:26,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 2512 transitions, 60632 flow [2022-12-12 20:14:26,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 20:14:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 20:14:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 196 transitions. [2022-12-12 20:14:26,308 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34265734265734266 [2022-12-12 20:14:26,309 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 200 predicate places. [2022-12-12 20:14:26,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 2512 transitions, 60632 flow [2022-12-12 20:14:26,457 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 2505 transitions, 60452 flow [2022-12-12 20:14:26,458 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 2505 transitions, 60452 flow [2022-12-12 20:14:26,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 31 states have internal predecessors, (95), 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) [2022-12-12 20:14:26,458 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:14:26,458 INFO L214 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] [2022-12-12 20:14:26,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-12 20:14:26,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:14:26,659 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:14:26,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:14:26,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1217497681, now seen corresponding path program 8 times [2022-12-12 20:14:26,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:14:26,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593535629] [2022-12-12 20:14:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:14:26,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:14:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:14:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:14:27,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:14:27,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593535629] [2022-12-12 20:14:27,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593535629] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:14:27,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409614208] [2022-12-12 20:14:27,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:14:27,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:14:27,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:14:27,800 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:14:27,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 20:14:27,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:14:27,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:14:27,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-12 20:14:27,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:14:28,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:14:28,238 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-12-12 20:14:28,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 25 [2022-12-12 20:14:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:14:28,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:14:28,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:14:28,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 82 [2022-12-12 20:14:28,522 INFO L321 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2022-12-12 20:14:28,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 30 [2022-12-12 20:14:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:14:28,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409614208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:14:28,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:14:28,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 26 [2022-12-12 20:14:28,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879936209] [2022-12-12 20:14:28,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:14:28,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 20:14:28,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:14:28,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 20:14:28,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-12-12 20:14:28,728 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 20:14:28,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 2505 transitions, 60452 flow. Second operand has 28 states, 28 states have (on average 3.0714285714285716) internal successors, (86), 28 states have internal predecessors, (86), 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) [2022-12-12 20:14:28,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:14:28,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 20:14:28,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:14:33,540 INFO L130 PetriNetUnfolder]: 5440/8346 cut-off events. [2022-12-12 20:14:33,540 INFO L131 PetriNetUnfolder]: For 30589/30589 co-relation queries the response was YES. [2022-12-12 20:14:33,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102214 conditions, 8346 events. 5440/8346 cut-off events. For 30589/30589 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 49195 event pairs, 22 based on Foata normal form. 4/6302 useless extension candidates. Maximal degree in co-relation 52443. Up to 7142 conditions per place. [2022-12-12 20:14:33,592 INFO L137 encePairwiseOnDemand]: 13/26 looper letters, 2413 selfloop transitions, 330 changer transitions 16/2792 dead transitions. [2022-12-12 20:14:33,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 2792 transitions, 72924 flow [2022-12-12 20:14:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-12 20:14:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-12 20:14:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 215 transitions. [2022-12-12 20:14:33,594 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.30626780626780625 [2022-12-12 20:14:33,594 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 226 predicate places. [2022-12-12 20:14:33,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 2792 transitions, 72924 flow [2022-12-12 20:14:33,660 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 257 places, 2776 transitions, 72484 flow [2022-12-12 20:14:33,661 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 2776 transitions, 72484 flow [2022-12-12 20:14:33,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0714285714285716) internal successors, (86), 28 states have internal predecessors, (86), 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) [2022-12-12 20:14:33,661 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:14:33,661 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:14:33,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-12 20:14:33,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-12 20:14:33,862 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:14:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:14:33,862 INFO L85 PathProgramCache]: Analyzing trace with hash -204563967, now seen corresponding path program 9 times [2022-12-12 20:14:33,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:14:33,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48754303] [2022-12-12 20:14:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:14:33,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:14:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:14:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:14:33,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:14:33,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48754303] [2022-12-12 20:14:33,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48754303] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:14:33,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898575704] [2022-12-12 20:14:33,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:14:33,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:14:33,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:14:33,960 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:14:33,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 20:14:34,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:14:34,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:14:34,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 20:14:34,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:14:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:14:34,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:14:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:14:34,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898575704] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:14:34,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:14:34,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-12 20:14:34,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612606841] [2022-12-12 20:14:34,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:14:34,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 20:14:34,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:14:34,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 20:14:34,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-12 20:14:34,182 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2022-12-12 20:14:34,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 2776 transitions, 72484 flow. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 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) [2022-12-12 20:14:34,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:14:34,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2022-12-12 20:14:34,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:14:39,584 INFO L130 PetriNetUnfolder]: 8545/13557 cut-off events. [2022-12-12 20:14:39,585 INFO L131 PetriNetUnfolder]: For 62742/62742 co-relation queries the response was YES. [2022-12-12 20:14:39,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177611 conditions, 13557 events. 8545/13557 cut-off events. For 62742/62742 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 92646 event pairs, 32 based on Foata normal form. 18/10739 useless extension candidates. Maximal degree in co-relation 50130. Up to 11742 conditions per place. [2022-12-12 20:14:39,677 INFO L137 encePairwiseOnDemand]: 18/26 looper letters, 4003 selfloop transitions, 203 changer transitions 100/4391 dead transitions. [2022-12-12 20:14:39,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 4391 transitions, 124016 flow [2022-12-12 20:14:39,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 20:14:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 20:14:39,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2022-12-12 20:14:39,678 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2022-12-12 20:14:39,679 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 237 predicate places. [2022-12-12 20:14:39,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 4391 transitions, 124016 flow [2022-12-12 20:14:39,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 4291 transitions, 121216 flow [2022-12-12 20:14:39,796 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 4291 transitions, 121216 flow [2022-12-12 20:14:39,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 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) [2022-12-12 20:14:39,796 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:14:39,796 INFO L214 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] [2022-12-12 20:14:39,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-12 20:14:39,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-12 20:14:39,997 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:14:39,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:14:39,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1270440702, now seen corresponding path program 1 times [2022-12-12 20:14:39,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:14:39,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104222799] [2022-12-12 20:14:39,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:14:39,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:14:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:14:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:14:40,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:14:40,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104222799] [2022-12-12 20:14:40,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104222799] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:14:40,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74186916] [2022-12-12 20:14:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:14:40,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:14:40,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:14:40,120 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:14:40,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 20:14:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:14:40,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 20:14:40,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:14:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:14:40,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:14:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:14:40,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74186916] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:14:40,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:14:40,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-12 20:14:40,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588157842] [2022-12-12 20:14:40,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:14:40,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 20:14:40,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:14:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 20:14:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-12-12 20:14:40,571 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 20:14:40,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 4291 transitions, 121216 flow. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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) [2022-12-12 20:14:40,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:14:40,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 20:14:40,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:14:49,851 INFO L130 PetriNetUnfolder]: 8706/13916 cut-off events. [2022-12-12 20:14:49,851 INFO L131 PetriNetUnfolder]: For 54624/54624 co-relation queries the response was YES. [2022-12-12 20:14:49,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196198 conditions, 13916 events. 8706/13916 cut-off events. For 54624/54624 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 96436 event pairs, 6 based on Foata normal form. 64/11240 useless extension candidates. Maximal degree in co-relation 55661. Up to 12217 conditions per place. [2022-12-12 20:14:49,963 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 3759 selfloop transitions, 642 changer transitions 106/4550 dead transitions. [2022-12-12 20:14:49,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 4550 transitions, 136444 flow [2022-12-12 20:14:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 20:14:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 20:14:49,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 226 transitions. [2022-12-12 20:14:49,965 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4346153846153846 [2022-12-12 20:14:49,965 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 256 predicate places. [2022-12-12 20:14:49,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 4550 transitions, 136444 flow [2022-12-12 20:14:50,103 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 285 places, 4444 transitions, 133240 flow [2022-12-12 20:14:50,104 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 4444 transitions, 133240 flow [2022-12-12 20:14:50,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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) [2022-12-12 20:14:50,104 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:14:50,104 INFO L214 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] [2022-12-12 20:14:50,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-12 20:14:50,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-12 20:14:50,305 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:14:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:14:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2033894760, now seen corresponding path program 2 times [2022-12-12 20:14:50,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:14:50,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638407846] [2022-12-12 20:14:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:14:50,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:14:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:14:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:14:50,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:14:50,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638407846] [2022-12-12 20:14:50,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638407846] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:14:50,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241570832] [2022-12-12 20:14:50,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:14:50,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:14:50,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:14:50,426 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:14:50,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-12 20:14:50,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:14:50,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:14:50,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:14:50,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:14:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:14:50,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:14:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:14:50,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241570832] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:14:50,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:14:50,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2022-12-12 20:14:50,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990630930] [2022-12-12 20:14:50,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:14:50,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 20:14:50,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:14:50,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 20:14:50,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-12 20:14:50,731 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 20:14:50,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 4444 transitions, 133240 flow. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 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) [2022-12-12 20:14:50,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:14:50,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 20:14:50,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:15:02,249 INFO L130 PetriNetUnfolder]: 7855/13475 cut-off events. [2022-12-12 20:15:02,249 INFO L131 PetriNetUnfolder]: For 80320/80320 co-relation queries the response was YES. [2022-12-12 20:15:02,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203138 conditions, 13475 events. 7855/13475 cut-off events. For 80320/80320 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 104293 event pairs, 6 based on Foata normal form. 522/12294 useless extension candidates. Maximal degree in co-relation 51946. Up to 11463 conditions per place. [2022-12-12 20:15:02,363 INFO L137 encePairwiseOnDemand]: 15/26 looper letters, 2867 selfloop transitions, 227 changer transitions 1616/4745 dead transitions. [2022-12-12 20:15:02,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 4745 transitions, 151998 flow [2022-12-12 20:15:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 20:15:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 20:15:02,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 195 transitions. [2022-12-12 20:15:02,365 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.375 [2022-12-12 20:15:02,365 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 269 predicate places. [2022-12-12 20:15:02,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 300 places, 4745 transitions, 151998 flow [2022-12-12 20:15:02,463 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 285 places, 3129 transitions, 100096 flow [2022-12-12 20:15:02,464 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 3129 transitions, 100096 flow [2022-12-12 20:15:02,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 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) [2022-12-12 20:15:02,464 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:15:02,464 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:15:02,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-12 20:15:02,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-12 20:15:02,665 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:15:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:15:02,665 INFO L85 PathProgramCache]: Analyzing trace with hash 370197125, now seen corresponding path program 10 times [2022-12-12 20:15:02,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:15:02,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678067436] [2022-12-12 20:15:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:15:02,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:15:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:15:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:15:02,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:15:02,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678067436] [2022-12-12 20:15:02,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678067436] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:15:02,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833196432] [2022-12-12 20:15:02,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:15:02,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:02,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:15:02,852 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:15:02,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-12 20:15:02,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:15:02,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:15:02,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 20:15:02,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:15:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:15:03,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:15:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:15:03,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833196432] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:15:03,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:15:03,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-12 20:15:03,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220745433] [2022-12-12 20:15:03,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:15:03,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:15:03,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:15:03,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:15:03,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:15:03,157 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2022-12-12 20:15:03,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 3129 transitions, 100096 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 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) [2022-12-12 20:15:03,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:15:03,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2022-12-12 20:15:03,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:15:07,410 INFO L130 PetriNetUnfolder]: 3396/6164 cut-off events. [2022-12-12 20:15:07,410 INFO L131 PetriNetUnfolder]: For 64387/64387 co-relation queries the response was YES. [2022-12-12 20:15:07,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97694 conditions, 6164 events. 3396/6164 cut-off events. For 64387/64387 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 44637 event pairs, 2 based on Foata normal form. 780/6423 useless extension candidates. Maximal degree in co-relation 28941. Up to 5407 conditions per place. [2022-12-12 20:15:07,627 INFO L137 encePairwiseOnDemand]: 18/26 looper letters, 1308 selfloop transitions, 107 changer transitions 1098/2559 dead transitions. [2022-12-12 20:15:07,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 2559 transitions, 86718 flow [2022-12-12 20:15:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 20:15:07,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 20:15:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 136 transitions. [2022-12-12 20:15:07,628 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37362637362637363 [2022-12-12 20:15:07,628 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 258 predicate places. [2022-12-12 20:15:07,628 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 2559 transitions, 86718 flow [2022-12-12 20:15:07,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 1461 transitions, 49461 flow [2022-12-12 20:15:07,666 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 1461 transitions, 49461 flow [2022-12-12 20:15:07,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 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) [2022-12-12 20:15:07,667 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:15:07,667 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:15:07,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 20:15:07,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:07,867 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:15:07,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:15:07,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1602148508, now seen corresponding path program 11 times [2022-12-12 20:15:07,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:15:07,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694833893] [2022-12-12 20:15:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:15:07,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:15:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:15:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:15:07,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:15:07,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694833893] [2022-12-12 20:15:07,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694833893] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:15:07,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806675651] [2022-12-12 20:15:07,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:15:07,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:07,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:15:07,972 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:15:07,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 20:15:08,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:15:08,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:15:08,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 20:15:08,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:15:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:15:08,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:15:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:15:08,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806675651] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:15:08,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:15:08,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-12 20:15:08,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077858506] [2022-12-12 20:15:08,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:15:08,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 20:15:08,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:15:08,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 20:15:08,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-12-12 20:15:08,180 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2022-12-12 20:15:08,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 1461 transitions, 49461 flow. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 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) [2022-12-12 20:15:08,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:15:08,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2022-12-12 20:15:08,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:15:08,921 INFO L130 PetriNetUnfolder]: 1448/2217 cut-off events. [2022-12-12 20:15:08,921 INFO L131 PetriNetUnfolder]: For 12827/12827 co-relation queries the response was YES. [2022-12-12 20:15:08,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37292 conditions, 2217 events. 1448/2217 cut-off events. For 12827/12827 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9981 event pairs, 0 based on Foata normal form. 0/1702 useless extension candidates. Maximal degree in co-relation 30492. Up to 2091 conditions per place. [2022-12-12 20:15:08,938 INFO L137 encePairwiseOnDemand]: 21/26 looper letters, 951 selfloop transitions, 6 changer transitions 0/1001 dead transitions. [2022-12-12 20:15:08,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 1001 transitions, 35860 flow [2022-12-12 20:15:08,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 20:15:08,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 20:15:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 49 transitions. [2022-12-12 20:15:08,939 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2692307692307692 [2022-12-12 20:15:08,939 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 128 predicate places. [2022-12-12 20:15:08,939 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 1001 transitions, 35860 flow [2022-12-12 20:15:08,964 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 1001 transitions, 35860 flow [2022-12-12 20:15:08,964 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 1001 transitions, 35860 flow [2022-12-12 20:15:08,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 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) [2022-12-12 20:15:08,965 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:15:08,965 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:15:08,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 20:15:09,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-12 20:15:09,165 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:15:09,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:15:09,166 INFO L85 PathProgramCache]: Analyzing trace with hash -439776133, now seen corresponding path program 12 times [2022-12-12 20:15:09,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:15:09,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022342785] [2022-12-12 20:15:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:15:09,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:15:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:15:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:15:09,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:15:09,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022342785] [2022-12-12 20:15:09,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022342785] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:15:09,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947551018] [2022-12-12 20:15:09,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:15:09,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:09,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:15:09,264 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:15:09,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-12 20:15:09,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 20:15:09,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:15:09,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 20:15:09,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:15:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:15:09,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:15:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:15:09,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947551018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:15:09,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:15:09,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-12-12 20:15:09,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542695265] [2022-12-12 20:15:09,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:15:09,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:15:09,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:15:09,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:15:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:15:09,575 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-12 20:15:09,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 1001 transitions, 35860 flow. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 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) [2022-12-12 20:15:09,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:15:09,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-12 20:15:09,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:15:10,662 INFO L130 PetriNetUnfolder]: 1325/1980 cut-off events. [2022-12-12 20:15:10,662 INFO L131 PetriNetUnfolder]: For 11613/11613 co-relation queries the response was YES. [2022-12-12 20:15:10,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35620 conditions, 1980 events. 1325/1980 cut-off events. For 11613/11613 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8297 event pairs, 0 based on Foata normal form. 0/1570 useless extension candidates. Maximal degree in co-relation 32051. Up to 1869 conditions per place. [2022-12-12 20:15:10,677 INFO L137 encePairwiseOnDemand]: 13/26 looper letters, 599 selfloop transitions, 270 changer transitions 0/869 dead transitions. [2022-12-12 20:15:10,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 869 transitions, 32413 flow [2022-12-12 20:15:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 20:15:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 20:15:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 151 transitions. [2022-12-12 20:15:10,678 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2903846153846154 [2022-12-12 20:15:10,679 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 136 predicate places. [2022-12-12 20:15:10,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 869 transitions, 32413 flow [2022-12-12 20:15:10,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 869 transitions, 32413 flow [2022-12-12 20:15:10,702 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 869 transitions, 32413 flow [2022-12-12 20:15:10,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 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) [2022-12-12 20:15:10,702 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:15:10,702 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:15:10,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-12 20:15:10,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-12 20:15:10,903 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:15:10,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:15:10,903 INFO L85 PathProgramCache]: Analyzing trace with hash 630038857, now seen corresponding path program 13 times [2022-12-12 20:15:10,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:15:10,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658092583] [2022-12-12 20:15:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:15:10,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:15:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:15:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:15:11,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:15:11,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658092583] [2022-12-12 20:15:11,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658092583] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:15:11,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010826176] [2022-12-12 20:15:11,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:15:11,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:11,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:15:11,032 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:15:11,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-12 20:15:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:15:11,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 20:15:11,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:15:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:15:11,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:15:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:15:11,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010826176] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:15:11,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:15:11,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-12 20:15:11,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741078228] [2022-12-12 20:15:11,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:15:11,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 20:15:11,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:15:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 20:15:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-12-12 20:15:11,398 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 20:15:11,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 869 transitions, 32413 flow. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 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) [2022-12-12 20:15:11,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:15:11,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 20:15:11,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:15:12,844 INFO L130 PetriNetUnfolder]: 2415/3626 cut-off events. [2022-12-12 20:15:12,844 INFO L131 PetriNetUnfolder]: For 18501/18501 co-relation queries the response was YES. [2022-12-12 20:15:12,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69957 conditions, 3626 events. 2415/3626 cut-off events. For 18501/18501 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 17186 event pairs, 0 based on Foata normal form. 0/2760 useless extension candidates. Maximal degree in co-relation 63401. Up to 3499 conditions per place. [2022-12-12 20:15:12,873 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 1259 selfloop transitions, 414 changer transitions 0/1687 dead transitions. [2022-12-12 20:15:12,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1687 transitions, 66975 flow [2022-12-12 20:15:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 20:15:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 20:15:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 178 transitions. [2022-12-12 20:15:12,874 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3603238866396761 [2022-12-12 20:15:12,875 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 154 predicate places. [2022-12-12 20:15:12,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 1687 transitions, 66975 flow [2022-12-12 20:15:12,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 1687 transitions, 66975 flow [2022-12-12 20:15:12,919 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 1687 transitions, 66975 flow [2022-12-12 20:15:12,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 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) [2022-12-12 20:15:12,919 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:15:12,919 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:15:12,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-12 20:15:13,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:13,125 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:15:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:15:13,125 INFO L85 PathProgramCache]: Analyzing trace with hash -936294145, now seen corresponding path program 14 times [2022-12-12 20:15:13,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:15:13,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182645791] [2022-12-12 20:15:13,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:15:13,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:15:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:15:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:13,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:15:13,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182645791] [2022-12-12 20:15:13,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182645791] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:15:13,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904727169] [2022-12-12 20:15:13,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:15:13,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:13,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:15:13,256 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:15:13,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-12 20:15:13,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:15:13,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:15:13,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 20:15:13,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:15:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:13,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:15:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:13,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904727169] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:15:13,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:15:13,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 20:15:13,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801561334] [2022-12-12 20:15:13,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:15:13,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:15:13,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:15:13,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:15:13,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:15:13,616 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 20:15:13,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 1687 transitions, 66975 flow. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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) [2022-12-12 20:15:13,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:15:13,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 20:15:13,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:15:15,492 INFO L130 PetriNetUnfolder]: 2444/3677 cut-off events. [2022-12-12 20:15:15,492 INFO L131 PetriNetUnfolder]: For 21013/21013 co-relation queries the response was YES. [2022-12-12 20:15:15,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74533 conditions, 3677 events. 2444/3677 cut-off events. For 21013/21013 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 17535 event pairs, 0 based on Foata normal form. 0/2813 useless extension candidates. Maximal degree in co-relation 67552. Up to 3550 conditions per place. [2022-12-12 20:15:15,525 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 1523 selfloop transitions, 178 changer transitions 0/1715 dead transitions. [2022-12-12 20:15:15,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 1715 transitions, 71509 flow [2022-12-12 20:15:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 20:15:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 20:15:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 81 transitions. [2022-12-12 20:15:15,527 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.31153846153846154 [2022-12-12 20:15:15,527 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 163 predicate places. [2022-12-12 20:15:15,527 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 1715 transitions, 71509 flow [2022-12-12 20:15:15,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 1715 transitions, 71509 flow [2022-12-12 20:15:15,576 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 1715 transitions, 71509 flow [2022-12-12 20:15:15,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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) [2022-12-12 20:15:15,576 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:15:15,576 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:15:15,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-12 20:15:15,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:15,777 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:15:15,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:15:15,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1830924919, now seen corresponding path program 15 times [2022-12-12 20:15:15,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:15:15,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752325340] [2022-12-12 20:15:15,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:15:15,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:15:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:15:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:15,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:15:15,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752325340] [2022-12-12 20:15:15,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752325340] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:15:15,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696541432] [2022-12-12 20:15:15,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:15:15,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:15,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:15:15,928 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:15:15,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-12 20:15:16,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:15:16,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:15:16,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 20:15:16,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:15:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:16,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:15:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:16,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696541432] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:15:16,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:15:16,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-12 20:15:16,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450998331] [2022-12-12 20:15:16,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:15:16,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 20:15:16,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:15:16,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 20:15:16,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-12-12 20:15:16,243 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 20:15:16,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 1715 transitions, 71509 flow. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 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) [2022-12-12 20:15:16,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:15:16,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 20:15:16,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:15:18,131 INFO L130 PetriNetUnfolder]: 2488/3757 cut-off events. [2022-12-12 20:15:18,131 INFO L131 PetriNetUnfolder]: For 21508/21508 co-relation queries the response was YES. [2022-12-12 20:15:18,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79827 conditions, 3757 events. 2488/3757 cut-off events. For 21508/21508 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18176 event pairs, 0 based on Foata normal form. 0/2905 useless extension candidates. Maximal degree in co-relation 72510. Up to 3630 conditions per place. [2022-12-12 20:15:18,165 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 1468 selfloop transitions, 271 changer transitions 0/1753 dead transitions. [2022-12-12 20:15:18,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 1753 transitions, 76601 flow [2022-12-12 20:15:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 20:15:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 20:15:18,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 129 transitions. [2022-12-12 20:15:18,167 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33076923076923076 [2022-12-12 20:15:18,167 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 177 predicate places. [2022-12-12 20:15:18,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 1753 transitions, 76601 flow [2022-12-12 20:15:18,217 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 1753 transitions, 76601 flow [2022-12-12 20:15:18,217 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 1753 transitions, 76601 flow [2022-12-12 20:15:18,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 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) [2022-12-12 20:15:18,218 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:15:18,218 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:15:18,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-12 20:15:18,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:18,418 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:15:18,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:15:18,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1603196749, now seen corresponding path program 16 times [2022-12-12 20:15:18,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:15:18,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920577163] [2022-12-12 20:15:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:15:18,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:15:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:15:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:18,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:15:18,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920577163] [2022-12-12 20:15:18,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920577163] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:15:18,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401188302] [2022-12-12 20:15:18,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:15:18,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:18,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:15:18,560 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:15:18,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-12 20:15:18,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:15:18,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:15:18,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 20:15:18,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:15:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:18,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:15:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:18,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401188302] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:15:18,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:15:18,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-12-12 20:15:18,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540331197] [2022-12-12 20:15:18,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:15:18,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 20:15:18,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:15:18,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 20:15:18,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-12-12 20:15:18,900 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 20:15:18,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 1753 transitions, 76601 flow. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 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) [2022-12-12 20:15:18,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:15:18,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 20:15:18,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:15:21,059 INFO L130 PetriNetUnfolder]: 2447/3678 cut-off events. [2022-12-12 20:15:21,059 INFO L131 PetriNetUnfolder]: For 22163/22163 co-relation queries the response was YES. [2022-12-12 20:15:21,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81670 conditions, 3678 events. 2447/3678 cut-off events. For 22163/22163 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 17576 event pairs, 0 based on Foata normal form. 0/2858 useless extension candidates. Maximal degree in co-relation 74111. Up to 3551 conditions per place. [2022-12-12 20:15:21,091 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 1458 selfloop transitions, 232 changer transitions 0/1704 dead transitions. [2022-12-12 20:15:21,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 1704 transitions, 77807 flow [2022-12-12 20:15:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 20:15:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 20:15:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 93 transitions. [2022-12-12 20:15:21,092 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32517482517482516 [2022-12-12 20:15:21,093 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 186 predicate places. [2022-12-12 20:15:21,093 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 1704 transitions, 77807 flow [2022-12-12 20:15:21,145 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 1704 transitions, 77807 flow [2022-12-12 20:15:21,146 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 1704 transitions, 77807 flow [2022-12-12 20:15:21,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 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) [2022-12-12 20:15:21,146 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:15:21,146 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:15:21,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-12 20:15:21,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-12 20:15:21,353 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:15:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:15:21,353 INFO L85 PathProgramCache]: Analyzing trace with hash 140533501, now seen corresponding path program 17 times [2022-12-12 20:15:21,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:15:21,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532392036] [2022-12-12 20:15:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:15:21,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:15:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:15:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:21,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:15:21,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532392036] [2022-12-12 20:15:21,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532392036] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:15:21,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037737043] [2022-12-12 20:15:21,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:15:21,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:21,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:15:21,603 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:15:21,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-12 20:15:21,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:15:21,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:15:21,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 20:15:21,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:15:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:21,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:15:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:21,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037737043] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:15:21,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:15:21,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-12-12 20:15:21,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52188567] [2022-12-12 20:15:21,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:15:21,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:15:21,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:15:21,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:15:21,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:15:21,881 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-12 20:15:21,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 1704 transitions, 77807 flow. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2022-12-12 20:15:21,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:15:21,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-12 20:15:21,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:15:25,143 INFO L130 PetriNetUnfolder]: 2488/3749 cut-off events. [2022-12-12 20:15:25,143 INFO L131 PetriNetUnfolder]: For 24797/24797 co-relation queries the response was YES. [2022-12-12 20:15:25,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87033 conditions, 3749 events. 2488/3749 cut-off events. For 24797/24797 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18084 event pairs, 0 based on Foata normal form. 0/2929 useless extension candidates. Maximal degree in co-relation 79130. Up to 3622 conditions per place. [2022-12-12 20:15:25,175 INFO L137 encePairwiseOnDemand]: 14/26 looper letters, 1324 selfloop transitions, 525 changer transitions 0/1849 dead transitions. [2022-12-12 20:15:25,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 1849 transitions, 87731 flow [2022-12-12 20:15:25,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-12 20:15:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-12 20:15:25,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 272 transitions. [2022-12-12 20:15:25,177 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.27530364372469635 [2022-12-12 20:15:25,177 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 223 predicate places. [2022-12-12 20:15:25,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 1849 transitions, 87731 flow [2022-12-12 20:15:25,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 1849 transitions, 87731 flow [2022-12-12 20:15:25,230 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 1849 transitions, 87731 flow [2022-12-12 20:15:25,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2022-12-12 20:15:25,230 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:15:25,230 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:15:25,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-12 20:15:25,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-12 20:15:25,430 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:15:25,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:15:25,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2079203757, now seen corresponding path program 18 times [2022-12-12 20:15:25,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:15:25,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691655750] [2022-12-12 20:15:25,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:15:25,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:15:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:15:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:25,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:15:25,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691655750] [2022-12-12 20:15:25,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691655750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:15:25,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329159253] [2022-12-12 20:15:25,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:15:25,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:25,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:15:25,579 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:15:25,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-12 20:15:25,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 20:15:25,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:15:25,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 20:15:25,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:15:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:25,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:15:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:25,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329159253] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:15:25,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:15:25,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 20:15:25,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205446275] [2022-12-12 20:15:25,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:15:25,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:15:25,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:15:25,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:15:25,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:15:25,935 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 20:15:25,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 1849 transitions, 87731 flow. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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) [2022-12-12 20:15:25,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:15:25,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 20:15:25,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:15:28,207 INFO L130 PetriNetUnfolder]: 2444/3665 cut-off events. [2022-12-12 20:15:28,207 INFO L131 PetriNetUnfolder]: For 24485/24485 co-relation queries the response was YES. [2022-12-12 20:15:28,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88587 conditions, 3665 events. 2444/3665 cut-off events. For 24485/24485 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17388 event pairs, 0 based on Foata normal form. 0/2879 useless extension candidates. Maximal degree in co-relation 80588. Up to 3538 conditions per place. [2022-12-12 20:15:28,242 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 1609 selfloop transitions, 160 changer transitions 0/1798 dead transitions. [2022-12-12 20:15:28,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1798 transitions, 88825 flow [2022-12-12 20:15:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 20:15:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 20:15:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 74 transitions. [2022-12-12 20:15:28,244 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2846153846153846 [2022-12-12 20:15:28,244 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 231 predicate places. [2022-12-12 20:15:28,244 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 1798 transitions, 88825 flow [2022-12-12 20:15:28,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 1798 transitions, 88825 flow [2022-12-12 20:15:28,300 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 1798 transitions, 88825 flow [2022-12-12 20:15:28,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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) [2022-12-12 20:15:28,300 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:15:28,300 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:15:28,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-12 20:15:28,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:28,501 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:15:28,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:15:28,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1836280659, now seen corresponding path program 19 times [2022-12-12 20:15:28,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:15:28,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921291772] [2022-12-12 20:15:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:15:28,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:15:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:15:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:28,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:15:28,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921291772] [2022-12-12 20:15:28,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921291772] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:15:28,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870991429] [2022-12-12 20:15:28,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:15:28,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:28,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:15:28,759 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:15:28,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-12 20:15:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:15:28,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 20:15:28,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:15:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:28,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:15:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:29,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870991429] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:15:29,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:15:29,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 20:15:29,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366271463] [2022-12-12 20:15:29,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:15:29,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:15:29,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:15:29,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:15:29,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:15:29,052 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-12 20:15:29,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 1798 transitions, 88825 flow. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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) [2022-12-12 20:15:29,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:15:29,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-12 20:15:29,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:15:30,708 INFO L130 PetriNetUnfolder]: 2400/3581 cut-off events. [2022-12-12 20:15:30,709 INFO L131 PetriNetUnfolder]: For 25773/25773 co-relation queries the response was YES. [2022-12-12 20:15:30,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89977 conditions, 3581 events. 2400/3581 cut-off events. For 25773/25773 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16757 event pairs, 0 based on Foata normal form. 0/2829 useless extension candidates. Maximal degree in co-relation 81869. Up to 3454 conditions per place. [2022-12-12 20:15:30,745 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 1387 selfloop transitions, 330 changer transitions 0/1745 dead transitions. [2022-12-12 20:15:30,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 1745 transitions, 89615 flow [2022-12-12 20:15:30,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 20:15:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 20:15:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 80 transitions. [2022-12-12 20:15:30,746 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2022-12-12 20:15:30,747 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 239 predicate places. [2022-12-12 20:15:30,747 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 1745 transitions, 89615 flow [2022-12-12 20:15:30,805 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 1745 transitions, 89615 flow [2022-12-12 20:15:30,805 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 1745 transitions, 89615 flow [2022-12-12 20:15:30,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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) [2022-12-12 20:15:30,805 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:15:30,805 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:15:30,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-12 20:15:31,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:31,012 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:15:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:15:31,012 INFO L85 PathProgramCache]: Analyzing trace with hash 160141789, now seen corresponding path program 20 times [2022-12-12 20:15:31,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:15:31,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62881771] [2022-12-12 20:15:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:15:31,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:15:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:15:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:15:33,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:15:33,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62881771] [2022-12-12 20:15:33,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62881771] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:15:33,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697942703] [2022-12-12 20:15:33,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:15:33,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:33,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:15:33,494 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:15:33,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-12 20:15:33,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:15:33,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:15:33,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-12 20:15:33,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:15:34,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:15:34,156 INFO L321 Elim1Store]: treesize reduction 84, result has 52.5 percent of original size [2022-12-12 20:15:34,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 59 treesize of output 107 [2022-12-12 20:15:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:15:34,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:15:34,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:15:34,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 82 treesize of output 371 [2022-12-12 20:15:41,721 INFO L321 Elim1Store]: treesize reduction 292, result has 18.2 percent of original size [2022-12-12 20:15:41,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 81 treesize of output 78 [2022-12-12 20:15:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:15:41,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697942703] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:15:41,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:15:41,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 9] total 37 [2022-12-12 20:15:41,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595275266] [2022-12-12 20:15:41,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:15:41,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-12 20:15:41,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:15:41,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-12 20:15:41,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2022-12-12 20:15:41,854 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-12 20:15:41,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 1745 transitions, 89615 flow. Second operand has 39 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 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) [2022-12-12 20:15:41,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:15:41,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-12 20:15:41,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:15:54,044 INFO L130 PetriNetUnfolder]: 5522/8375 cut-off events. [2022-12-12 20:15:54,044 INFO L131 PetriNetUnfolder]: For 62617/62617 co-relation queries the response was YES. [2022-12-12 20:15:54,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220000 conditions, 8375 events. 5522/8375 cut-off events. For 62617/62617 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 47681 event pairs, 12 based on Foata normal form. 6/6540 useless extension candidates. Maximal degree in co-relation 162532. Up to 8127 conditions per place. [2022-12-12 20:15:54,280 INFO L137 encePairwiseOnDemand]: 9/26 looper letters, 3052 selfloop transitions, 1017 changer transitions 51/4120 dead transitions. [2022-12-12 20:15:54,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 4120 transitions, 221001 flow [2022-12-12 20:15:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-12 20:15:54,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-12-12 20:15:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 577 transitions. [2022-12-12 20:15:54,282 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2998960498960499 [2022-12-12 20:15:54,282 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 312 predicate places. [2022-12-12 20:15:54,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 343 places, 4120 transitions, 221001 flow [2022-12-12 20:15:54,425 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 343 places, 4069 transitions, 218193 flow [2022-12-12 20:15:54,425 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 4069 transitions, 218193 flow [2022-12-12 20:15:54,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 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) [2022-12-12 20:15:54,425 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:15:54,425 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:15:54,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-12 20:15:54,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-12 20:15:54,626 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:15:54,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:15:54,626 INFO L85 PathProgramCache]: Analyzing trace with hash -27167873, now seen corresponding path program 21 times [2022-12-12 20:15:54,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:15:54,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051534756] [2022-12-12 20:15:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:15:54,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:15:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:15:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:15:55,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:15:55,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051534756] [2022-12-12 20:15:55,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051534756] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:15:55,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34635604] [2022-12-12 20:15:55,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:15:55,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:15:55,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:15:55,803 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:15:55,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-12 20:15:55,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:15:55,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:15:55,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-12 20:15:55,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:15:56,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:15:56,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:15:56,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:15:56,481 INFO L321 Elim1Store]: treesize reduction 48, result has 37.7 percent of original size [2022-12-12 20:15:56,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 59 treesize of output 43 [2022-12-12 20:15:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:15:56,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:15:56,909 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:15:56,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 82 treesize of output 371 [2022-12-12 20:16:00,030 INFO L321 Elim1Store]: treesize reduction 269, result has 24.6 percent of original size [2022-12-12 20:16:00,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 81 treesize of output 101 [2022-12-12 20:16:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:16:00,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34635604] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:16:00,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:16:00,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 9] total 32 [2022-12-12 20:16:00,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398256783] [2022-12-12 20:16:00,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:16:00,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-12 20:16:00,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:16:00,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-12 20:16:00,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2022-12-12 20:16:00,163 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-12 20:16:00,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 4069 transitions, 218193 flow. Second operand has 34 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 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) [2022-12-12 20:16:00,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:16:00,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-12 20:16:00,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:16:15,586 INFO L130 PetriNetUnfolder]: 8571/13170 cut-off events. [2022-12-12 20:16:15,586 INFO L131 PetriNetUnfolder]: For 101102/101102 co-relation queries the response was YES. [2022-12-12 20:16:15,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359587 conditions, 13170 events. 8571/13170 cut-off events. For 101102/101102 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 82989 event pairs, 7 based on Foata normal form. 12/10370 useless extension candidates. Maximal degree in co-relation 219429. Up to 12805 conditions per place. [2022-12-12 20:16:15,844 INFO L137 encePairwiseOnDemand]: 10/26 looper letters, 5328 selfloop transitions, 1053 changer transitions 100/6481 dead transitions. [2022-12-12 20:16:15,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 6481 transitions, 361303 flow [2022-12-12 20:16:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 20:16:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-12 20:16:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 270 transitions. [2022-12-12 20:16:15,845 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2022-12-12 20:16:15,846 INFO L295 CegarLoopForPetriNet]: 31 programPoint places, 341 predicate places. [2022-12-12 20:16:15,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 372 places, 6481 transitions, 361303 flow [2022-12-12 20:16:16,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 372 places, 6381 transitions, 355595 flow [2022-12-12 20:16:16,087 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 6381 transitions, 355595 flow [2022-12-12 20:16:16,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 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) [2022-12-12 20:16:16,087 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:16:16,087 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:16:16,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-12 20:16:16,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-12 20:16:16,288 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:16:16,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:16:16,288 INFO L85 PathProgramCache]: Analyzing trace with hash -90371120, now seen corresponding path program 3 times [2022-12-12 20:16:16,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:16:16,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627597975] [2022-12-12 20:16:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:16:16,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:16:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:16:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:16:17,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:16:17,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627597975] [2022-12-12 20:16:17,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627597975] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:16:17,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355093731] [2022-12-12 20:16:17,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:16:17,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:16:17,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:16:17,700 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:16:17,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-12 20:16:17,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:16:17,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:16:17,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 106 conjunts are in the unsatisfiable core [2022-12-12 20:16:17,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:16:18,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-12 20:16:18,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:16:18,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:16:18,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:16:18,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:16:18,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:16:18,716 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-12-12 20:16:18,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 37 [2022-12-12 20:16:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:16:18,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:16:19,318 WARN L837 $PredicateComparison]: unable to prove that (or (let ((.cse10 (* 4 c_~M~0))) (let ((.cse4 (+ c_~A~0.offset .cse10)) (.cse5 (+ .cse10 c_~B~0.offset)) (.cse1 (+ 4 c_~B~0.offset)) (.cse3 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1505 (Array Int Int)) (v_ArrVal_1506 (Array Int Int)) (~A~0.base Int)) (let ((.cse6 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1505) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1506))) (let ((.cse2 (select .cse6 ~A~0.base)) (.cse0 (select .cse6 c_~B~0.base))) (<= (+ (select .cse0 .cse1) c_~res1~0 (select .cse2 .cse3)) (+ (select .cse2 .cse4) (select .cse0 .cse5) c_~res2~0))))) (forall ((v_ArrVal_1505 (Array Int Int)) (v_ArrVal_1506 (Array Int Int)) (~A~0.base Int)) (let ((.cse9 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1505) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1506))) (let ((.cse8 (select .cse9 c_~B~0.base)) (.cse7 (select .cse9 ~A~0.base))) (< (+ (select .cse7 .cse4) (select .cse8 .cse5) c_~res2~0) (+ (select .cse8 .cse1) c_~res1~0 (select .cse7 .cse3) 1)))))))) (not (< 0 c_~M~0))) is different from false [2022-12-12 20:16:19,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:16:19,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 87 [2022-12-12 20:16:19,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:16:19,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 10486 treesize of output 9666 [2022-12-12 20:16:19,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:16:19,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 9590 treesize of output 7094 [2022-12-12 20:16:19,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:16:19,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 7030 treesize of output 5814 [2022-12-12 20:16:19,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:16:19,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 5750 treesize of output 5174 Received shutdown request... [2022-12-12 20:26:43,419 WARN L249 SmtUtils]: Removed 2 from assertion stack [2022-12-12 20:26:43,420 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-12-12 20:26:43,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-12 20:26:43,435 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 20:26:43,435 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 20:26:43,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-12 20:26:43,621 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 15ms.. [2022-12-12 20:26:43,622 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-12-12 20:26:43,623 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-12-12 20:26:43,623 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-12-12 20:26:43,623 INFO L445 BasicCegarLoop]: Path program histogram: [21, 3, 1, 1, 1, 1] [2022-12-12 20:26:43,625 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 20:26:43,625 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 20:26:43,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 08:26:43 BasicIcfg [2022-12-12 20:26:43,627 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 20:26:43,627 INFO L158 Benchmark]: Toolchain (without parser) took 795798.49ms. Allocated memory was 177.2MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 153.5MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. [2022-12-12 20:26:43,627 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 177.2MB. Free memory is still 154.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 20:26:43,627 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.90ms. Allocated memory is still 177.2MB. Free memory was 153.1MB in the beginning and 140.9MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-12 20:26:43,628 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.99ms. Allocated memory is still 177.2MB. Free memory was 140.9MB in the beginning and 138.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 20:26:43,628 INFO L158 Benchmark]: Boogie Preprocessor took 50.53ms. Allocated memory is still 177.2MB. Free memory was 138.4MB in the beginning and 136.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 20:26:43,628 INFO L158 Benchmark]: RCFGBuilder took 855.06ms. Allocated memory was 177.2MB in the beginning and 212.9MB in the end (delta: 35.7MB). Free memory was 136.3MB in the beginning and 184.1MB in the end (delta: -47.8MB). Peak memory consumption was 58.4MB. Max. memory is 8.0GB. [2022-12-12 20:26:43,628 INFO L158 Benchmark]: TraceAbstraction took 794559.20ms. Allocated memory was 212.9MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 182.6MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. [2022-12-12 20:26:43,630 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 177.2MB. Free memory is still 154.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 260.90ms. Allocated memory is still 177.2MB. Free memory was 153.1MB in the beginning and 140.9MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 66.99ms. Allocated memory is still 177.2MB. Free memory was 140.9MB in the beginning and 138.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 50.53ms. Allocated memory is still 177.2MB. Free memory was 138.4MB in the beginning and 136.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 855.06ms. Allocated memory was 177.2MB in the beginning and 212.9MB in the end (delta: 35.7MB). Free memory was 136.3MB in the beginning and 184.1MB in the end (delta: -47.8MB). Peak memory consumption was 58.4MB. Max. memory is 8.0GB. * TraceAbstraction took 794559.20ms. Allocated memory was 212.9MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 182.6MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.9s, 157 PlacesBefore, 31 PlacesAfterwards, 163 TransitionsBefore, 26 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 96 TrivialYvCompositions, 30 ConcurrentYvCompositions, 11 ChoiceCompositions, 137 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 721, independent: 715, independent conditional: 715, independent unconditional: 0, dependent: 6, dependent conditional: 6, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 721, independent: 715, independent conditional: 0, independent unconditional: 715, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 721, independent: 715, independent conditional: 0, independent unconditional: 715, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 721, independent: 715, independent conditional: 0, independent unconditional: 715, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 721, independent: 715, independent conditional: 0, independent unconditional: 715, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 721, independent: 715, independent conditional: 0, independent unconditional: 715, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 32, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 721, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 721, unknown conditional: 0, unknown unconditional: 721] , Statistics on independence cache: Total cache size (in pairs): 1137, Positive cache size: 1131, Positive conditional cache size: 0, Positive unconditional cache size: 1131, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 15ms.. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 15ms.. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 15ms.. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 15ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 191 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 1.6s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 794.4s, OverallIterations: 28, TraceHistogramMax: 2, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 105.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5930 SdHoareTripleChecker+Valid, 14.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5930 mSDsluCounter, 1178 SdHoareTripleChecker+Invalid, 12.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 108 IncrementalHoareTripleChecker+Unchecked, 1070 mSDsCounter, 567 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 22453 IncrementalHoareTripleChecker+Invalid, 23128 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 567 mSolverCounterUnsat, 108 mSDtfsCounter, 22453 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1939 GetRequests, 974 SyntacticMatches, 56 SemanticMatches, 909 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9723 ImplicationChecksByTransitivity, 29.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=355595occurred in iteration=27, InterpolantAutomatonStates: 549, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 27 MinimizatonAttempts, 106788 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 42.9s InterpolantComputationTime, 1361 NumberOfCodeBlocks, 1361 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 1943 ConstructedInterpolants, 17 QuantifiedInterpolants, 25162 SizeOfPredicates, 390 NumberOfNonLiveVariables, 7938 ConjunctsInSsa, 817 ConjunctsInUnsatCore, 77 InterpolantComputations, 4 PerfectInterpolantSequences, 282/505 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