/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-NoLbe.epf --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_REDUNDANT_FLOW -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-6.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 11:25:16,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 11:25:16,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 11:25:16,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 11:25:16,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 11:25:16,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 11:25:16,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 11:25:16,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 11:25:16,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 11:25:16,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 11:25:16,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 11:25:16,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 11:25:16,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 11:25:16,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 11:25:16,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 11:25:16,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 11:25:16,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 11:25:16,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 11:25:16,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 11:25:16,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 11:25:16,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 11:25:16,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 11:25:16,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 11:25:16,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 11:25:16,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 11:25:16,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 11:25:16,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 11:25:16,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 11:25:16,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 11:25:16,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 11:25:16,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 11:25:16,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 11:25:16,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 11:25:16,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 11:25:16,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 11:25:16,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 11:25:16,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 11:25:16,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 11:25:16,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 11:25:16,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 11:25:16,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 11:25:16,863 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-NoLbe.epf [2022-12-12 11:25:16,886 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 11:25:16,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 11:25:16,888 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 11:25:16,888 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 11:25:16,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 11:25:16,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 11:25:16,889 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 11:25:16,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 11:25:16,890 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 11:25:16,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 11:25:16,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 11:25:16,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 11:25:16,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 11:25:16,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 11:25:16,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 11:25:16,891 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 11:25:16,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 11:25:16,891 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 11:25:16,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 11:25:16,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 11:25:16,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 11:25:16,891 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 11:25:16,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 11:25:16,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 11:25:16,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 11:25:16,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 11:25:16,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 11:25:16,892 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-12 11:25:16,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 11:25:16,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 11:25:16,892 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 11:25:16,892 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_REDUNDANT_FLOW [2022-12-12 11:25:17,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 11:25:17,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 11:25:17,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 11:25:17,163 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 11:25:17,183 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 11:25:17,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-6.i [2022-12-12 11:25:18,141 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 11:25:18,415 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 11:25:18,415 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-6.i [2022-12-12 11:25:18,427 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/510521e30/ce66859c28ef4915a5a5710a4a553312/FLAG1a6459251 [2022-12-12 11:25:18,443 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/510521e30/ce66859c28ef4915a5a5710a4a553312 [2022-12-12 11:25:18,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 11:25:18,446 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 11:25:18,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 11:25:18,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 11:25:18,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 11:25:18,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d1beac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18, skipping insertion in model container [2022-12-12 11:25:18,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 11:25:18,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 11:25:18,738 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-6.i[30243,30256] [2022-12-12 11:25:18,744 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,745 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,748 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,749 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,752 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,752 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,752 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,752 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,756 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,757 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 11:25:18,765 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 11:25:18,792 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-6.i[30243,30256] [2022-12-12 11:25:18,793 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,794 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,794 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,794 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,800 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,800 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,801 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,801 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,802 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,802 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,803 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 11:25:18,829 INFO L208 MainTranslator]: Completed translation [2022-12-12 11:25:18,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18 WrapperNode [2022-12-12 11:25:18,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 11:25:18,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 11:25:18,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 11:25:18,834 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 11:25:18,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,877 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-12 11:25:18,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 11:25:18,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 11:25:18,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 11:25:18,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 11:25:18,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,893 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 11:25:18,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 11:25:18,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 11:25:18,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 11:25:18,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 11:25:18,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 11:25:18,957 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 11:25:18,980 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 11:25:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-12 11:25:19,008 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-12 11:25:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-12 11:25:19,008 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-12 11:25:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 11:25:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 11:25:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 11:25:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 11:25:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 11:25:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 11:25:19,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 11:25:19,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 11:25:19,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 11:25:19,009 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 11:25:19,090 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 11:25:19,092 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 11:25:19,222 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 11:25:19,227 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 11:25:19,227 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-12 11:25:19,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:25:19 BoogieIcfgContainer [2022-12-12 11:25:19,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 11:25:19,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 11:25:19,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 11:25:19,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 11:25:19,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 11:25:18" (1/3) ... [2022-12-12 11:25:19,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d4be5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:25:19, skipping insertion in model container [2022-12-12 11:25:19,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (2/3) ... [2022-12-12 11:25:19,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d4be5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:25:19, skipping insertion in model container [2022-12-12 11:25:19,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:25:19" (3/3) ... [2022-12-12 11:25:19,235 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-6.i [2022-12-12 11:25:19,249 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 11:25:19,249 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 11:25:19,249 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 11:25:19,300 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-12 11:25:19,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 196 flow [2022-12-12 11:25:19,385 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-12 11:25:19,385 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 11:25:19,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2022-12-12 11:25:19,390 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 93 transitions, 196 flow [2022-12-12 11:25:19,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 188 flow [2022-12-12 11:25:19,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 11:25:19,415 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;@62c71e3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 11:25:19,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 11:25:19,454 INFO L130 PetriNetUnfolder]: 6/81 cut-off events. [2022-12-12 11:25:19,454 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 11:25:19,454 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 11:25:19,455 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, 1, 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 11:25:19,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 11:25:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 11:25:19,461 INFO L85 PathProgramCache]: Analyzing trace with hash 95801150, now seen corresponding path program 1 times [2022-12-12 11:25:19,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 11:25:19,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742192316] [2022-12-12 11:25:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:25:19,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 11:25:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:25:19,774 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 11:25:19,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 11:25:19,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742192316] [2022-12-12 11:25:19,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742192316] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 11:25:19,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 11:25:19,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 11:25:19,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956469175] [2022-12-12 11:25:19,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 11:25:19,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 11:25:19,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 11:25:19,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 11:25:19,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 11:25:19,813 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 93 [2022-12-12 11:25:19,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 11:25:19,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 11:25:19,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 93 [2022-12-12 11:25:19,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 11:25:19,869 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-12-12 11:25:19,869 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 11:25:19,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 92 events. 3/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 18/106 useless extension candidates. Maximal degree in co-relation 75. Up to 6 conditions per place. [2022-12-12 11:25:19,871 INFO L137 encePairwiseOnDemand]: 86/93 looper letters, 9 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2022-12-12 11:25:19,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 206 flow [2022-12-12 11:25:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 11:25:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 11:25:19,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2022-12-12 11:25:19,881 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.9283154121863799 [2022-12-12 11:25:19,883 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 1 predicate places. [2022-12-12 11:25:19,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 206 flow [2022-12-12 11:25:19,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 89 transitions, 198 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-12 11:25:19,887 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 198 flow [2022-12-12 11:25:19,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 11:25:19,888 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 11:25:19,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:25:19,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 11:25:19,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 11:25:19,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 11:25:19,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1875915451, now seen corresponding path program 1 times [2022-12-12 11:25:19,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 11:25:19,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432911522] [2022-12-12 11:25:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:25:19,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 11:25:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:25:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:20,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 11:25:20,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432911522] [2022-12-12 11:25:20,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432911522] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 11:25:20,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048012203] [2022-12-12 11:25:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:25:20,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 11:25:20,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 11:25:20,042 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 11:25:20,093 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 11:25:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:25:20,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 11:25:20,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 11:25:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:20,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 11:25:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:20,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048012203] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 11:25:20,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 11:25:20,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-12 11:25:20,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774380713] [2022-12-12 11:25:20,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 11:25:20,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 11:25:20,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 11:25:20,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 11:25:20,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-12 11:25:20,237 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-12 11:25:20,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 198 flow. Second operand has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 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 11:25:20,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 11:25:20,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-12 11:25:20,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 11:25:20,305 INFO L130 PetriNetUnfolder]: 3/101 cut-off events. [2022-12-12 11:25:20,305 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-12 11:25:20,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 101 events. 3/101 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 103. Up to 10 conditions per place. [2022-12-12 11:25:20,309 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 10 selfloop transitions, 9 changer transitions 0/95 dead transitions. [2022-12-12 11:25:20,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 256 flow [2022-12-12 11:25:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 11:25:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 11:25:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 723 transitions. [2022-12-12 11:25:20,316 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8637992831541219 [2022-12-12 11:25:20,316 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 7 predicate places. [2022-12-12 11:25:20,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 256 flow [2022-12-12 11:25:20,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 95 transitions, 224 flow, removed 14 selfloop flow, removed 2 redundant places. [2022-12-12 11:25:20,319 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 95 transitions, 224 flow [2022-12-12 11:25:20,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 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 11:25:20,320 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 11:25:20,320 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 11:25:20,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-12 11:25:20,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 11:25:20,526 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 11:25:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 11:25:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1869128357, now seen corresponding path program 2 times [2022-12-12 11:25:20,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 11:25:20,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947709492] [2022-12-12 11:25:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:25:20,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 11:25:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:25:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:20,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 11:25:20,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947709492] [2022-12-12 11:25:20,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947709492] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 11:25:20,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143025006] [2022-12-12 11:25:20,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 11:25:20,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 11:25:20,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 11:25:20,701 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 11:25:20,716 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 11:25:20,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 11:25:20,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 11:25:20,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 11:25:20,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 11:25:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:20,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 11:25:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:20,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143025006] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 11:25:20,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 11:25:20,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-12 11:25:20,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393824966] [2022-12-12 11:25:20,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 11:25:20,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 11:25:20,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 11:25:20,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 11:25:20,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-12 11:25:20,917 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-12 11:25:20,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 95 transitions, 224 flow. Second operand has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 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 11:25:20,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 11:25:20,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-12 11:25:20,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 11:25:21,046 INFO L130 PetriNetUnfolder]: 3/129 cut-off events. [2022-12-12 11:25:21,046 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-12 11:25:21,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 129 events. 3/129 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 166. Up to 12 conditions per place. [2022-12-12 11:25:21,047 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 14 selfloop transitions, 21 changer transitions 0/111 dead transitions. [2022-12-12 11:25:21,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 111 transitions, 358 flow [2022-12-12 11:25:21,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 11:25:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 11:25:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1677 transitions. [2022-12-12 11:25:21,051 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.858678955453149 [2022-12-12 11:25:21,052 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 25 predicate places. [2022-12-12 11:25:21,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 111 transitions, 358 flow [2022-12-12 11:25:21,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 111 transitions, 318 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-12-12 11:25:21,056 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 111 transitions, 318 flow [2022-12-12 11:25:21,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 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 11:25:21,057 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 11:25:21,057 INFO L214 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 11:25:21,062 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 11:25:21,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-12 11:25:21,262 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 11:25:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 11:25:21,262 INFO L85 PathProgramCache]: Analyzing trace with hash 526543515, now seen corresponding path program 3 times [2022-12-12 11:25:21,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 11:25:21,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612973881] [2022-12-12 11:25:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:25:21,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 11:25:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:25:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:21,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 11:25:21,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612973881] [2022-12-12 11:25:21,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612973881] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 11:25:21,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798695988] [2022-12-12 11:25:21,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 11:25:21,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 11:25:21,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 11:25:21,606 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 11:25:21,608 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 11:25:21,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-12 11:25:21,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 11:25:21,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-12 11:25:21,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 11:25:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:21,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 11:25:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:22,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798695988] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 11:25:22,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 11:25:22,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2022-12-12 11:25:22,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961217102] [2022-12-12 11:25:22,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 11:25:22,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 11:25:22,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 11:25:22,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 11:25:22,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-12-12 11:25:22,017 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-12 11:25:22,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 111 transitions, 318 flow. Second operand has 31 states, 31 states have (on average 80.06451612903226) internal successors, (2482), 31 states have internal predecessors, (2482), 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 11:25:22,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 11:25:22,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-12 11:25:22,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 11:25:22,400 INFO L130 PetriNetUnfolder]: 3/178 cut-off events. [2022-12-12 11:25:22,401 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-12-12 11:25:22,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 178 events. 3/178 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 7/182 useless extension candidates. Maximal degree in co-relation 307. Up to 24 conditions per place. [2022-12-12 11:25:22,402 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 21 selfloop transitions, 42 changer transitions 0/139 dead transitions. [2022-12-12 11:25:22,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 139 transitions, 598 flow [2022-12-12 11:25:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-12 11:25:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-12 11:25:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3346 transitions. [2022-12-12 11:25:22,407 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8566308243727598 [2022-12-12 11:25:22,408 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 60 predicate places. [2022-12-12 11:25:22,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 139 transitions, 598 flow [2022-12-12 11:25:22,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 139 transitions, 520 flow, removed 21 selfloop flow, removed 18 redundant places. [2022-12-12 11:25:22,410 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 139 transitions, 520 flow [2022-12-12 11:25:22,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 80.06451612903226) internal successors, (2482), 31 states have internal predecessors, (2482), 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 11:25:22,411 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 11:25:22,411 INFO L214 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:25:22,418 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 11:25:22,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 11:25:22,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 11:25:22,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 11:25:22,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1164740830, now seen corresponding path program 4 times [2022-12-12 11:25:22,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 11:25:22,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453695897] [2022-12-12 11:25:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:25:22,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 11:25:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:25:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:24,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 11:25:24,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453695897] [2022-12-12 11:25:24,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453695897] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 11:25:24,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736598858] [2022-12-12 11:25:24,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 11:25:24,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 11:25:24,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 11:25:24,683 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 11:25:24,698 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 11:25:24,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 11:25:24,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 11:25:24,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-12 11:25:24,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 11:25:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 486 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:28,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 11:25:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:31,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736598858] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 11:25:31,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 11:25:31,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 145 [2022-12-12 11:25:31,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574948452] [2022-12-12 11:25:31,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 11:25:31,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-12-12 11:25:31,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 11:25:31,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-12-12 11:25:31,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1237, Invalid=19643, Unknown=0, NotChecked=0, Total=20880 [2022-12-12 11:25:31,569 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 93 [2022-12-12 11:25:31,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 139 transitions, 520 flow. Second operand has 145 states, 145 states have (on average 62.241379310344826) internal successors, (9025), 145 states have internal predecessors, (9025), 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 11:25:31,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 11:25:31,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 93 [2022-12-12 11:25:31,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 11:28:39,340 INFO L130 PetriNetUnfolder]: 35884/135442 cut-off events. [2022-12-12 11:28:39,340 INFO L131 PetriNetUnfolder]: For 4354/4354 co-relation queries the response was YES. [2022-12-12 11:28:39,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202744 conditions, 135442 events. 35884/135442 cut-off events. For 4354/4354 co-relation queries the response was YES. Maximal size of possible extension queue 2043. Compared 1988915 event pairs, 0 based on Foata normal form. 0/124515 useless extension candidates. Maximal degree in co-relation 202699. Up to 18118 conditions per place. [2022-12-12 11:28:39,990 INFO L137 encePairwiseOnDemand]: 76/93 looper letters, 1459 selfloop transitions, 2210 changer transitions 1200/4974 dead transitions. [2022-12-12 11:28:39,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1148 places, 4974 transitions, 19928 flow [2022-12-12 11:28:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1016 states. [2022-12-12 11:28:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1016 states. [2022-12-12 11:28:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 66942 transitions. [2022-12-12 11:28:40,048 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7084709169418338 [2022-12-12 11:28:40,050 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 1057 predicate places. [2022-12-12 11:28:40,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1148 places, 4974 transitions, 19928 flow [2022-12-12 11:28:40,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1147 places, 4974 transitions, 19916 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-12 11:28:40,130 INFO L495 AbstractCegarLoop]: Abstraction has has 1147 places, 4974 transitions, 19916 flow [2022-12-12 11:28:40,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 62.241379310344826) internal successors, (9025), 145 states have internal predecessors, (9025), 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 11:28:40,133 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 11:28:40,133 INFO L214 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:28:40,148 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 11:28:40,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 11:28:40,338 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 11:28:40,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 11:28:40,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1491459372, now seen corresponding path program 1 times [2022-12-12 11:28:40,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 11:28:40,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916938512] [2022-12-12 11:28:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:28:40,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 11:28:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:28:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:28:42,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 11:28:42,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916938512] [2022-12-12 11:28:42,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916938512] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 11:28:42,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651003627] [2022-12-12 11:28:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:28:42,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 11:28:42,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 11:28:42,251 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 11:28:42,251 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 11:28:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:28:42,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-12 11:28:42,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 11:28:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 486 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:28:45,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 11:28:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:28:49,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651003627] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 11:28:49,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 11:28:49,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 153 [2022-12-12 11:28:49,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560248764] [2022-12-12 11:28:49,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 11:28:49,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-12-12 11:28:49,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 11:28:49,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-12-12 11:28:49,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1255, Invalid=22001, Unknown=0, NotChecked=0, Total=23256 [2022-12-12 11:28:49,251 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 93 [2022-12-12 11:28:49,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1147 places, 4974 transitions, 19916 flow. Second operand has 153 states, 153 states have (on average 62.23529411764706) internal successors, (9522), 153 states have internal predecessors, (9522), 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 11:28:49,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 11:28:49,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 93 [2022-12-12 11:28:49,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand