/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-11 18:41:08,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-11 18:41:08,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-11 18:41:08,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-11 18:41:08,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-11 18:41:08,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-11 18:41:08,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-11 18:41:08,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-11 18:41:08,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-11 18:41:08,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-11 18:41:08,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-11 18:41:08,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-11 18:41:08,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-11 18:41:08,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-11 18:41:08,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-11 18:41:08,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-11 18:41:08,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-11 18:41:08,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-11 18:41:08,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-11 18:41:08,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-11 18:41:08,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-11 18:41:08,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-11 18:41:08,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-11 18:41:08,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-11 18:41:08,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-11 18:41:08,870 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-11 18:41:08,870 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-11 18:41:08,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-11 18:41:08,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-11 18:41:08,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-11 18:41:08,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-11 18:41:08,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-11 18:41:08,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-11 18:41:08,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-11 18:41:08,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-11 18:41:08,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-11 18:41:08,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-11 18:41:08,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-11 18:41:08,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-11 18:41:08,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-11 18:41:08,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-11 18:41:08,880 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 [2022-12-11 18:41:08,921 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-11 18:41:08,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-11 18:41:08,922 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-11 18:41:08,922 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-11 18:41:08,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-11 18:41:08,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-11 18:41:08,922 INFO L138 SettingsManager]: * Use SBE=true [2022-12-11 18:41:08,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-11 18:41:08,923 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-11 18:41:08,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-11 18:41:08,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-11 18:41:08,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-11 18:41:08,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-11 18:41:08,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-11 18:41:08,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-11 18:41:08,923 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-11 18:41:08,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-11 18:41:08,924 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-11 18:41:08,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-11 18:41:08,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-11 18:41:08,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-11 18:41:08,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-11 18:41:08,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-11 18:41:08,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 18:41:08,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-11 18:41:08,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-11 18:41:08,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-11 18:41:08,925 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-11 18:41:08,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-11 18:41:08,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-11 18:41:08,925 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-11 18:41:08,925 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-11 18:41:09,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-11 18:41:09,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-11 18:41:09,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-11 18:41:09,207 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-11 18:41:09,207 INFO L275 PluginConnector]: CDTParser initialized [2022-12-11 18:41:09,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-5.i [2022-12-11 18:41:10,199 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-11 18:41:10,336 INFO L351 CDTParser]: Found 1 translation units. [2022-12-11 18:41:10,336 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-5.i [2022-12-11 18:41:10,354 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d5d3fa51/621b0be17d114923aad15dfc5320a282/FLAGa44951d8c [2022-12-11 18:41:10,365 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d5d3fa51/621b0be17d114923aad15dfc5320a282 [2022-12-11 18:41:10,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-11 18:41:10,367 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-11 18:41:10,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-11 18:41:10,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-11 18:41:10,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-11 18:41:10,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20b03fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10, skipping insertion in model container [2022-12-11 18:41:10,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-11 18:41:10,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-11 18:41:10,565 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-5.i[30243,30256] [2022-12-11 18:41:10,573 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,574 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,577 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,577 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,582 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,582 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,582 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,582 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,586 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,587 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 18:41:10,595 INFO L203 MainTranslator]: Completed pre-run [2022-12-11 18:41:10,630 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-5.i[30243,30256] [2022-12-11 18:41:10,637 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,638 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,639 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,639 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,643 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,644 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,644 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,644 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,647 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,647 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 18:41:10,681 INFO L208 MainTranslator]: Completed translation [2022-12-11 18:41:10,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10 WrapperNode [2022-12-11 18:41:10,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-11 18:41:10,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-11 18:41:10,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-11 18:41:10,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-11 18:41:10,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,714 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,733 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-11 18:41:10,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-11 18:41:10,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-11 18:41:10,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-11 18:41:10,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-11 18:41:10,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,751 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-11 18:41:10,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-11 18:41:10,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-11 18:41:10,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-11 18:41:10,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 18:41:10,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:41:10,800 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) [2022-12-11 18:41:10,815 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 [2022-12-11 18:41:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-11 18:41:10,831 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-11 18:41:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-11 18:41:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-11 18:41:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-11 18:41:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-11 18:41:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-11 18:41:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-11 18:41:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-11 18:41:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-11 18:41:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-11 18:41:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-11 18:41:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-11 18:41:10,833 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-11 18:41:10,960 INFO L236 CfgBuilder]: Building ICFG [2022-12-11 18:41:10,961 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-11 18:41:11,072 INFO L277 CfgBuilder]: Performing block encoding [2022-12-11 18:41:11,077 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-11 18:41:11,077 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-11 18:41:11,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 06:41:11 BoogieIcfgContainer [2022-12-11 18:41:11,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-11 18:41:11,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-11 18:41:11,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-11 18:41:11,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-11 18:41:11,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.12 06:41:10" (1/3) ... [2022-12-11 18:41:11,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4076de28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 06:41:11, skipping insertion in model container [2022-12-11 18:41:11,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (2/3) ... [2022-12-11 18:41:11,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4076de28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 06:41:11, skipping insertion in model container [2022-12-11 18:41:11,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 06:41:11" (3/3) ... [2022-12-11 18:41:11,084 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2022-12-11 18:41:11,097 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-11 18:41:11,097 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-11 18:41:11,097 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-11 18:41:11,129 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-11 18:41:11,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 196 flow [2022-12-11 18:41:11,178 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-11 18:41:11,179 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-11 18:41:11,183 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. [2022-12-11 18:41:11,183 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 93 transitions, 196 flow [2022-12-11 18:41:11,186 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 188 flow [2022-12-11 18:41:11,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-11 18:41:11,196 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;@6f270e7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-11 18:41:11,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-11 18:41:11,235 INFO L130 PetriNetUnfolder]: 6/81 cut-off events. [2022-12-11 18:41:11,235 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-11 18:41:11,235 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:41:11,236 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] [2022-12-11 18:41:11,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 18:41:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:41:11,240 INFO L85 PathProgramCache]: Analyzing trace with hash 95801150, now seen corresponding path program 1 times [2022-12-11 18:41:11,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:41:11,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023465602] [2022-12-11 18:41:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:41:11,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:41:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:41:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:11,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:41:11,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023465602] [2022-12-11 18:41:11,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023465602] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:41:11,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:41:11,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-11 18:41:11,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168985941] [2022-12-11 18:41:11,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:41:11,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-11 18:41:11,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:41:11,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-11 18:41:11,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-11 18:41:11,461 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 93 [2022-12-11 18:41:11,462 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) [2022-12-11 18:41:11,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:41:11,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 93 [2022-12-11 18:41:11,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:41:11,492 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-12-11 18:41:11,493 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-11 18:41:11,493 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. [2022-12-11 18:41:11,494 INFO L137 encePairwiseOnDemand]: 86/93 looper letters, 9 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2022-12-11 18:41:11,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 206 flow [2022-12-11 18:41:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-11 18:41:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-11 18:41:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2022-12-11 18:41:11,503 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.9283154121863799 [2022-12-11 18:41:11,504 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 188 flow. Second operand 3 states and 259 transitions. [2022-12-11 18:41:11,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 206 flow [2022-12-11 18:41:11,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 89 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-11 18:41:11,509 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 188 flow [2022-12-11 18:41:11,510 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2022-12-11 18:41:11,513 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 0 predicate places. [2022-12-11 18:41:11,513 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 188 flow [2022-12-11 18:41:11,513 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) [2022-12-11 18:41:11,513 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:41:11,513 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] [2022-12-11 18:41:11,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-11 18:41:11,514 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 18:41:11,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:41:11,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1875915451, now seen corresponding path program 1 times [2022-12-11 18:41:11,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:41:11,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344550535] [2022-12-11 18:41:11,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:41:11,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:41:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:41:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:11,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:41:11,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344550535] [2022-12-11 18:41:11,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344550535] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 18:41:11,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243362930] [2022-12-11 18:41:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:41:11,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 18:41:11,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:41:11,640 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) [2022-12-11 18:41:11,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-11 18:41:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:41:11,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-11 18:41:11,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 18:41:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:11,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 18:41:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:11,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243362930] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 18:41:11,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 18:41:11,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-11 18:41:11,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174777491] [2022-12-11 18:41:11,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 18:41:11,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-11 18:41:11,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:41:11,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-11 18:41:11,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-11 18:41:11,920 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-11 18:41:11,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 188 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) [2022-12-11 18:41:11,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:41:11,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-11 18:41:11,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:41:12,001 INFO L130 PetriNetUnfolder]: 3/101 cut-off events. [2022-12-11 18:41:12,001 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-11 18:41:12,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 101 events. 3/101 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 2/100 useless extension candidates. Maximal degree in co-relation 97. Up to 6 conditions per place. [2022-12-11 18:41:12,005 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 10 selfloop transitions, 9 changer transitions 0/95 dead transitions. [2022-12-11 18:41:12,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 95 transitions, 244 flow [2022-12-11 18:41:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-11 18:41:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-11 18:41:12,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 723 transitions. [2022-12-11 18:41:12,012 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8637992831541219 [2022-12-11 18:41:12,012 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 188 flow. Second operand 9 states and 723 transitions. [2022-12-11 18:41:12,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 95 transitions, 244 flow [2022-12-11 18:41:12,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 95 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-11 18:41:12,015 INFO L231 Difference]: Finished difference. Result has 101 places, 93 transitions, 236 flow [2022-12-11 18:41:12,016 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=236, PETRI_PLACES=101, PETRI_TRANSITIONS=93} [2022-12-11 18:41:12,016 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 10 predicate places. [2022-12-11 18:41:12,017 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 93 transitions, 236 flow [2022-12-11 18:41:12,017 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) [2022-12-11 18:41:12,017 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:41:12,018 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] [2022-12-11 18:41:12,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-11 18:41:12,224 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 [2022-12-11 18:41:12,224 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 18:41:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:41:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1869128357, now seen corresponding path program 2 times [2022-12-11 18:41:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:41:12,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114647499] [2022-12-11 18:41:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:41:12,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:41:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:41:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:12,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:41:12,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114647499] [2022-12-11 18:41:12,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114647499] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 18:41:12,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048609794] [2022-12-11 18:41:12,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 18:41:12,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 18:41:12,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:41:12,547 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) [2022-12-11 18:41:12,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-11 18:41:12,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 18:41:12,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 18:41:12,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-11 18:41:12,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 18:41:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:12,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 18:41:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:12,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048609794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 18:41:12,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 18:41:12,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-11 18:41:12,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788666787] [2022-12-11 18:41:12,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 18:41:12,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-11 18:41:12,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:41:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-11 18:41:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-11 18:41:12,828 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-11 18:41:12,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 93 transitions, 236 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) [2022-12-11 18:41:12,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:41:12,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-11 18:41:12,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:41:13,002 INFO L130 PetriNetUnfolder]: 3/129 cut-off events. [2022-12-11 18:41:13,002 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-11 18:41:13,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 129 events. 3/129 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 4/130 useless extension candidates. Maximal degree in co-relation 186. Up to 11 conditions per place. [2022-12-11 18:41:13,007 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 14 selfloop transitions, 21 changer transitions 0/111 dead transitions. [2022-12-11 18:41:13,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 111 transitions, 402 flow [2022-12-11 18:41:13,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-11 18:41:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-11 18:41:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1677 transitions. [2022-12-11 18:41:13,014 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.858678955453149 [2022-12-11 18:41:13,014 INFO L175 Difference]: Start difference. First operand has 101 places, 93 transitions, 236 flow. Second operand 21 states and 1677 transitions. [2022-12-11 18:41:13,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 111 transitions, 402 flow [2022-12-11 18:41:13,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 111 transitions, 388 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-11 18:41:13,018 INFO L231 Difference]: Finished difference. Result has 125 places, 106 transitions, 360 flow [2022-12-11 18:41:13,018 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=360, PETRI_PLACES=125, PETRI_TRANSITIONS=106} [2022-12-11 18:41:13,019 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 34 predicate places. [2022-12-11 18:41:13,019 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 106 transitions, 360 flow [2022-12-11 18:41:13,020 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) [2022-12-11 18:41:13,020 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:41:13,020 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] [2022-12-11 18:41:13,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-11 18:41:13,225 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 [2022-12-11 18:41:13,226 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 18:41:13,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:41:13,227 INFO L85 PathProgramCache]: Analyzing trace with hash 526543515, now seen corresponding path program 3 times [2022-12-11 18:41:13,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:41:13,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984526445] [2022-12-11 18:41:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:41:13,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:41:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:41:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:13,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:41:13,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984526445] [2022-12-11 18:41:13,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984526445] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 18:41:13,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4614516] [2022-12-11 18:41:13,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-11 18:41:13,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 18:41:13,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:41:13,551 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) [2022-12-11 18:41:13,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-11 18:41:13,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-11 18:41:13,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 18:41:13,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-11 18:41:13,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 18:41:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:13,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 18:41:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:13,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4614516] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 18:41:13,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 18:41:13,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 27 [2022-12-11 18:41:13,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84329962] [2022-12-11 18:41:13,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 18:41:13,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-11 18:41:13,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:41:13,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-11 18:41:13,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2022-12-11 18:41:13,919 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-11 18:41:13,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 106 transitions, 360 flow. Second operand has 27 states, 27 states have (on average 80.07407407407408) internal successors, (2162), 27 states have internal predecessors, (2162), 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) [2022-12-11 18:41:13,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:41:13,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-11 18:41:13,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:41:14,230 INFO L130 PetriNetUnfolder]: 3/164 cut-off events. [2022-12-11 18:41:14,231 INFO L131 PetriNetUnfolder]: For 184/184 co-relation queries the response was YES. [2022-12-11 18:41:14,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 164 events. 3/164 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 5/166 useless extension candidates. Maximal degree in co-relation 330. Up to 21 conditions per place. [2022-12-11 18:41:14,232 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 19 selfloop transitions, 36 changer transitions 0/131 dead transitions. [2022-12-11 18:41:14,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 131 transitions, 662 flow [2022-12-11 18:41:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-11 18:41:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-11 18:41:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2868 transitions. [2022-12-11 18:41:14,251 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8566308243727598 [2022-12-11 18:41:14,252 INFO L175 Difference]: Start difference. First operand has 125 places, 106 transitions, 360 flow. Second operand 36 states and 2868 transitions. [2022-12-11 18:41:14,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 131 transitions, 662 flow [2022-12-11 18:41:14,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 131 transitions, 628 flow, removed 11 selfloop flow, removed 6 redundant places. [2022-12-11 18:41:14,256 INFO L231 Difference]: Finished difference. Result has 160 places, 122 transitions, 548 flow [2022-12-11 18:41:14,256 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=548, PETRI_PLACES=160, PETRI_TRANSITIONS=122} [2022-12-11 18:41:14,267 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 69 predicate places. [2022-12-11 18:41:14,267 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 122 transitions, 548 flow [2022-12-11 18:41:14,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 80.07407407407408) internal successors, (2162), 27 states have internal predecessors, (2162), 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) [2022-12-11 18:41:14,269 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:41:14,269 INFO L214 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 18:41:14,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-11 18:41:14,469 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 [2022-12-11 18:41:14,470 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 18:41:14,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:41:14,470 INFO L85 PathProgramCache]: Analyzing trace with hash 446459774, now seen corresponding path program 4 times [2022-12-11 18:41:14,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:41:14,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732235331] [2022-12-11 18:41:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:41:14,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:41:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:41:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:16,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:41:16,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732235331] [2022-12-11 18:41:16,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732235331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 18:41:16,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320257371] [2022-12-11 18:41:16,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-11 18:41:16,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 18:41:16,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:41:16,088 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) [2022-12-11 18:41:16,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-11 18:41:16,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-11 18:41:16,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 18:41:16,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-11 18:41:16,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 18:41:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 335 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:19,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 18:41:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:21,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320257371] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 18:41:21,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 18:41:21,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 127 [2022-12-11 18:41:21,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155477267] [2022-12-11 18:41:21,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 18:41:21,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-12-11 18:41:21,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:41:21,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-12-11 18:41:21,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=15040, Unknown=0, NotChecked=0, Total=16002 [2022-12-11 18:41:21,804 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 93 [2022-12-11 18:41:21,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 122 transitions, 548 flow. Second operand has 127 states, 127 states have (on average 62.275590551181104) internal successors, (7909), 127 states have internal predecessors, (7909), 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) [2022-12-11 18:41:21,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:41:21,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 93 [2022-12-11 18:41:21,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:43:24,841 INFO L130 PetriNetUnfolder]: 24040/87979 cut-off events. [2022-12-11 18:43:24,841 INFO L131 PetriNetUnfolder]: For 17424/17424 co-relation queries the response was YES. [2022-12-11 18:43:25,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140904 conditions, 87979 events. 24040/87979 cut-off events. For 17424/17424 co-relation queries the response was YES. Maximal size of possible extension queue 1534. Compared 1216777 event pairs, 0 based on Foata normal form. 0/81096 useless extension candidates. Maximal degree in co-relation 140843. Up to 12145 conditions per place. [2022-12-11 18:43:25,639 INFO L137 encePairwiseOnDemand]: 76/93 looper letters, 1111 selfloop transitions, 1725 changer transitions 934/3858 dead transitions. [2022-12-11 18:43:25,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 952 places, 3858 transitions, 15558 flow [2022-12-11 18:43:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 793 states. [2022-12-11 18:43:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2022-12-11 18:43:25,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 52217 transitions. [2022-12-11 18:43:25,689 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7080367191419544 [2022-12-11 18:43:25,689 INFO L175 Difference]: Start difference. First operand has 160 places, 122 transitions, 548 flow. Second operand 793 states and 52217 transitions. [2022-12-11 18:43:25,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 952 places, 3858 transitions, 15558 flow [2022-12-11 18:43:25,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 934 places, 3858 transitions, 15508 flow, removed 7 selfloop flow, removed 18 redundant places. [2022-12-11 18:43:25,838 INFO L231 Difference]: Finished difference. Result has 1252 places, 1872 transitions, 8528 flow [2022-12-11 18:43:25,838 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=793, PETRI_FLOW=8528, PETRI_PLACES=1252, PETRI_TRANSITIONS=1872} [2022-12-11 18:43:25,840 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 1161 predicate places. [2022-12-11 18:43:25,841 INFO L495 AbstractCegarLoop]: Abstraction has has 1252 places, 1872 transitions, 8528 flow [2022-12-11 18:43:25,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 62.275590551181104) internal successors, (7909), 127 states have internal predecessors, (7909), 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) [2022-12-11 18:43:25,845 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:43:25,845 INFO L214 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 18:43:25,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-11 18:43:26,050 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 [2022-12-11 18:43:26,050 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 18:43:26,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:43:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1303608374, now seen corresponding path program 1 times [2022-12-11 18:43:26,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:43:26,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821928015] [2022-12-11 18:43:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:43:26,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:43:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:43:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:43:27,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:43:27,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821928015] [2022-12-11 18:43:27,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821928015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 18:43:27,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415007358] [2022-12-11 18:43:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:43:27,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 18:43:27,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:43:27,784 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) [2022-12-11 18:43:27,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-11 18:43:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:43:27,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-11 18:43:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 18:43:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 325 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:43:30,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 18:43:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:43:33,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415007358] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 18:43:33,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 18:43:33,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 135 [2022-12-11 18:43:33,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7194325] [2022-12-11 18:43:33,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 18:43:33,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-12-11 18:43:33,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:43:33,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-12-11 18:43:33,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=978, Invalid=17112, Unknown=0, NotChecked=0, Total=18090 [2022-12-11 18:43:33,388 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 93 [2022-12-11 18:43:33,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1252 places, 1872 transitions, 8528 flow. Second operand has 135 states, 135 states have (on average 62.266666666666666) internal successors, (8406), 135 states have internal predecessors, (8406), 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) [2022-12-11 18:43:33,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:43:33,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 93 [2022-12-11 18:43:33,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand