/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 20:14:16,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 20:14:16,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 20:14:16,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 20:14:16,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 20:14:16,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 20:14:16,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 20:14:16,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 20:14:16,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 20:14:16,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 20:14:16,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 20:14:16,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 20:14:16,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 20:14:16,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 20:14:16,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 20:14:16,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 20:14:16,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 20:14:16,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 20:14:16,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 20:14:16,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 20:14:16,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 20:14:16,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 20:14:16,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 20:14:16,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 20:14:16,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 20:14:16,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 20:14:16,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 20:14:16,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 20:14:16,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 20:14:16,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 20:14:16,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 20:14:16,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 20:14:16,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 20:14:16,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 20:14:16,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 20:14:16,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 20:14:16,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 20:14:16,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 20:14:16,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 20:14:16,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 20:14:16,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 20:14:16,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-05 20:14:16,517 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 20:14:16,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 20:14:16,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 20:14:16,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 20:14:16,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 20:14:16,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 20:14:16,519 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 20:14:16,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 20:14:16,519 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 20:14:16,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 20:14:16,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 20:14:16,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 20:14:16,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 20:14:16,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 20:14:16,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 20:14:16,521 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 20:14:16,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 20:14:16,521 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 20:14:16,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 20:14:16,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 20:14:16,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 20:14:16,521 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 20:14:16,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 20:14:16,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 20:14:16,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 20:14:16,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 20:14:16,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 20:14:16,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 20:14:16,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 20:14:16,522 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 20:14:16,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 20:14:16,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 20:14:16,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 20:14:16,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 20:14:16,839 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 20:14:16,850 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 20:14:16,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2022-12-05 20:14:17,837 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 20:14:18,076 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 20:14:18,076 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2022-12-05 20:14:18,091 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/001951164/8b9e5f9d54ca4f82a761ab6b03678539/FLAG58b9f67ea [2022-12-05 20:14:18,106 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/001951164/8b9e5f9d54ca4f82a761ab6b03678539 [2022-12-05 20:14:18,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 20:14:18,108 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 20:14:18,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 20:14:18,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 20:14:18,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 20:14:18,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 08:14:18" (1/1) ... [2022-12-05 20:14:18,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ac14afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:18, skipping insertion in model container [2022-12-05 20:14:18,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 08:14:18" (1/1) ... [2022-12-05 20:14:18,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 20:14:18,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 20:14:18,389 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:18,390 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:18,392 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:18,393 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:18,396 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:18,398 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:18,398 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:18,400 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:18,400 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/triangular-longer-2.i[30963,30976] [2022-12-05 20:14:18,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 20:14:18,407 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 20:14:18,438 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:18,438 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:18,439 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:18,439 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:18,441 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:18,441 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:18,441 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:18,441 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:18,442 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/triangular-longer-2.i[30963,30976] [2022-12-05 20:14:18,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 20:14:18,471 INFO L208 MainTranslator]: Completed translation [2022-12-05 20:14:18,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:18 WrapperNode [2022-12-05 20:14:18,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 20:14:18,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 20:14:18,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 20:14:18,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 20:14:18,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:18" (1/1) ... [2022-12-05 20:14:18,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:18" (1/1) ... [2022-12-05 20:14:18,504 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-12-05 20:14:18,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 20:14:18,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 20:14:18,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 20:14:18,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 20:14:18,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:18" (1/1) ... [2022-12-05 20:14:18,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:18" (1/1) ... [2022-12-05 20:14:18,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:18" (1/1) ... [2022-12-05 20:14:18,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:18" (1/1) ... [2022-12-05 20:14:18,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:18" (1/1) ... [2022-12-05 20:14:18,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:18" (1/1) ... [2022-12-05 20:14:18,529 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:18" (1/1) ... [2022-12-05 20:14:18,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:18" (1/1) ... [2022-12-05 20:14:18,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 20:14:18,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 20:14:18,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 20:14:18,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 20:14:18,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:18" (1/1) ... [2022-12-05 20:14:18,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 20:14:18,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:18,575 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-05 20:14:18,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-05 20:14:18,613 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-05 20:14:18,613 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-05 20:14:18,613 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-05 20:14:18,614 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-05 20:14:18,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 20:14:18,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 20:14:18,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 20:14:18,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 20:14:18,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 20:14:18,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 20:14:18,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 20:14:18,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 20:14:18,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 20:14:18,615 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 20:14:18,735 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 20:14:18,736 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 20:14:18,841 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 20:14:18,845 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 20:14:18,845 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-05 20:14:18,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 08:14:18 BoogieIcfgContainer [2022-12-05 20:14:18,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 20:14:18,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 20:14:18,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 20:14:18,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 20:14:18,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 08:14:18" (1/3) ... [2022-12-05 20:14:18,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e39f925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 08:14:18, skipping insertion in model container [2022-12-05 20:14:18,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:18" (2/3) ... [2022-12-05 20:14:18,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e39f925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 08:14:18, skipping insertion in model container [2022-12-05 20:14:18,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 08:14:18" (3/3) ... [2022-12-05 20:14:18,852 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2022-12-05 20:14:18,864 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 20:14:18,864 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 20:14:18,864 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 20:14:18,900 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-05 20:14:18,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2022-12-05 20:14:18,968 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2022-12-05 20:14:18,968 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 20:14:18,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2022-12-05 20:14:18,974 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2022-12-05 20:14:18,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2022-12-05 20:14:18,979 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 20:14:19,021 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 64 transitions, 134 flow [2022-12-05 20:14:19,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 64 transitions, 134 flow [2022-12-05 20:14:19,058 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2022-12-05 20:14:19,059 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 20:14:19,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2022-12-05 20:14:19,065 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 64 transitions, 134 flow [2022-12-05 20:14:19,066 INFO L188 LiptonReduction]: Number of co-enabled transitions 1078 [2022-12-05 20:14:20,990 INFO L203 LiptonReduction]: Total number of compositions: 51 [2022-12-05 20:14:21,004 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 20:14:21,009 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;@6e9414e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 20:14:21,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 20:14:21,015 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-12-05 20:14:21,015 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 20:14:21,016 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:21,016 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-05 20:14:21,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:21,021 INFO L85 PathProgramCache]: Analyzing trace with hash -977143138, now seen corresponding path program 1 times [2022-12-05 20:14:21,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:21,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884501021] [2022-12-05 20:14:21,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:21,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:21,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:21,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884501021] [2022-12-05 20:14:21,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884501021] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:14:21,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:14:21,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 20:14:21,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870216515] [2022-12-05 20:14:21,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:14:21,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 20:14:21,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:21,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 20:14:21,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 20:14:21,280 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:21,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 32 flow. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:21,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:21,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:21,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:21,332 INFO L130 PetriNetUnfolder]: 94/152 cut-off events. [2022-12-05 20:14:21,333 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 20:14:21,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 395 event pairs, 11 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2022-12-05 20:14:21,334 INFO L137 encePairwiseOnDemand]: 9/13 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2022-12-05 20:14:21,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2022-12-05 20:14:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 20:14:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 20:14:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 27 transitions. [2022-12-05 20:14:21,342 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2022-12-05 20:14:21,343 INFO L175 Difference]: Start difference. First operand has 18 places, 13 transitions, 32 flow. Second operand 4 states and 27 transitions. [2022-12-05 20:14:21,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2022-12-05 20:14:21,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-05 20:14:21,346 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2022-12-05 20:14:21,347 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2022-12-05 20:14:21,350 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2022-12-05 20:14:21,350 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2022-12-05 20:14:21,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:21,350 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:21,350 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:21,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 20:14:21,350 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:21,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1562132877, now seen corresponding path program 1 times [2022-12-05 20:14:21,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:21,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653442307] [2022-12-05 20:14:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:21,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:21,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:21,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653442307] [2022-12-05 20:14:21,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653442307] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:14:21,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:14:21,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 20:14:21,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80190610] [2022-12-05 20:14:21,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:14:21,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 20:14:21,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:21,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 20:14:21,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 20:14:21,444 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:21,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:21,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:21,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:21,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:21,542 INFO L130 PetriNetUnfolder]: 126/217 cut-off events. [2022-12-05 20:14:21,543 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-12-05 20:14:21,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 664 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2022-12-05 20:14:21,544 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2022-12-05 20:14:21,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2022-12-05 20:14:21,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 20:14:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 20:14:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 38 transitions. [2022-12-05 20:14:21,547 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2022-12-05 20:14:21,547 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 38 transitions. [2022-12-05 20:14:21,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2022-12-05 20:14:21,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 20:14:21,551 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2022-12-05 20:14:21,551 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2022-12-05 20:14:21,552 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2022-12-05 20:14:21,552 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2022-12-05 20:14:21,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:21,552 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:21,552 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:21,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 20:14:21,553 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1562125437, now seen corresponding path program 2 times [2022-12-05 20:14:21,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:21,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407037157] [2022-12-05 20:14:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:21,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:21,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:21,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407037157] [2022-12-05 20:14:21,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407037157] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:14:21,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:14:21,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 20:14:21,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994326956] [2022-12-05 20:14:21,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:14:21,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 20:14:21,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:21,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 20:14:21,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-05 20:14:21,679 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:21,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:21,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:21,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:21,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:21,750 INFO L130 PetriNetUnfolder]: 114/199 cut-off events. [2022-12-05 20:14:21,750 INFO L131 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2022-12-05 20:14:21,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 199 events. 114/199 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 632 event pairs, 19 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 636. Up to 84 conditions per place. [2022-12-05 20:14:21,752 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 29 selfloop transitions, 9 changer transitions 4/42 dead transitions. [2022-12-05 20:14:21,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 284 flow [2022-12-05 20:14:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 20:14:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 20:14:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 33 transitions. [2022-12-05 20:14:21,753 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2022-12-05 20:14:21,753 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 5 states and 33 transitions. [2022-12-05 20:14:21,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 284 flow [2022-12-05 20:14:21,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 282 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-05 20:14:21,756 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 182 flow [2022-12-05 20:14:21,757 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2022-12-05 20:14:21,757 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 17 predicate places. [2022-12-05 20:14:21,757 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 182 flow [2022-12-05 20:14:21,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:21,757 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:21,757 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:21,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 20:14:21,758 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:21,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:21,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1570456670, now seen corresponding path program 1 times [2022-12-05 20:14:21,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:21,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702596191] [2022-12-05 20:14:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:21,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:21,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:21,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702596191] [2022-12-05 20:14:21,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702596191] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:14:21,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:14:21,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 20:14:21,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144305178] [2022-12-05 20:14:21,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:14:21,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 20:14:21,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:21,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 20:14:21,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-05 20:14:21,853 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:21,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 182 flow. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:21,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:21,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:21,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:21,931 INFO L130 PetriNetUnfolder]: 136/239 cut-off events. [2022-12-05 20:14:21,931 INFO L131 PetriNetUnfolder]: For 571/571 co-relation queries the response was YES. [2022-12-05 20:14:21,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 239 events. 136/239 cut-off events. For 571/571 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 798 event pairs, 31 based on Foata normal form. 4/243 useless extension candidates. Maximal degree in co-relation 842. Up to 101 conditions per place. [2022-12-05 20:14:21,934 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 30 selfloop transitions, 16 changer transitions 8/54 dead transitions. [2022-12-05 20:14:21,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 419 flow [2022-12-05 20:14:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 20:14:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 20:14:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 41 transitions. [2022-12-05 20:14:21,937 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2022-12-05 20:14:21,937 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 182 flow. Second operand 7 states and 41 transitions. [2022-12-05 20:14:21,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 419 flow [2022-12-05 20:14:21,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 54 transitions, 379 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-12-05 20:14:21,943 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 269 flow [2022-12-05 20:14:21,943 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=269, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2022-12-05 20:14:21,944 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 22 predicate places. [2022-12-05 20:14:21,944 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 269 flow [2022-12-05 20:14:21,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:21,945 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:21,945 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:21,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 20:14:21,945 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:21,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:21,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1571069540, now seen corresponding path program 2 times [2022-12-05 20:14:21,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:21,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879446285] [2022-12-05 20:14:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:21,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:22,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:22,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879446285] [2022-12-05 20:14:22,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879446285] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:14:22,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:14:22,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 20:14:22,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752814496] [2022-12-05 20:14:22,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:14:22,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 20:14:22,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:22,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 20:14:22,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-05 20:14:22,034 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:22,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 269 flow. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:22,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:22,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:22,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:22,113 INFO L130 PetriNetUnfolder]: 172/303 cut-off events. [2022-12-05 20:14:22,113 INFO L131 PetriNetUnfolder]: For 787/787 co-relation queries the response was YES. [2022-12-05 20:14:22,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1151 conditions, 303 events. 172/303 cut-off events. For 787/787 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1061 event pairs, 22 based on Foata normal form. 8/311 useless extension candidates. Maximal degree in co-relation 1127. Up to 79 conditions per place. [2022-12-05 20:14:22,116 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 38 selfloop transitions, 22 changer transitions 3/63 dead transitions. [2022-12-05 20:14:22,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 519 flow [2022-12-05 20:14:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 20:14:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 20:14:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 46 transitions. [2022-12-05 20:14:22,118 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2022-12-05 20:14:22,118 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 269 flow. Second operand 8 states and 46 transitions. [2022-12-05 20:14:22,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 519 flow [2022-12-05 20:14:22,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 495 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-05 20:14:22,123 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 375 flow [2022-12-05 20:14:22,123 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=375, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2022-12-05 20:14:22,124 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 32 predicate places. [2022-12-05 20:14:22,124 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 375 flow [2022-12-05 20:14:22,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:22,125 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:22,125 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:22,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-05 20:14:22,125 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:22,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1617536060, now seen corresponding path program 3 times [2022-12-05 20:14:22,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:22,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101205190] [2022-12-05 20:14:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:22,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:22,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:22,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101205190] [2022-12-05 20:14:22,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101205190] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:14:22,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:14:22,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 20:14:22,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223104807] [2022-12-05 20:14:22,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:14:22,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 20:14:22,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:22,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 20:14:22,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-05 20:14:22,197 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:22,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 375 flow. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:22,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:22,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:22,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:22,289 INFO L130 PetriNetUnfolder]: 168/295 cut-off events. [2022-12-05 20:14:22,289 INFO L131 PetriNetUnfolder]: For 1373/1373 co-relation queries the response was YES. [2022-12-05 20:14:22,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1328 conditions, 295 events. 168/295 cut-off events. For 1373/1373 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1046 event pairs, 18 based on Foata normal form. 8/303 useless extension candidates. Maximal degree in co-relation 1299. Up to 71 conditions per place. [2022-12-05 20:14:22,291 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 28 selfloop transitions, 27 changer transitions 10/65 dead transitions. [2022-12-05 20:14:22,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 651 flow [2022-12-05 20:14:22,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 20:14:22,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 20:14:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 45 transitions. [2022-12-05 20:14:22,292 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2022-12-05 20:14:22,292 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 375 flow. Second operand 8 states and 45 transitions. [2022-12-05 20:14:22,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 651 flow [2022-12-05 20:14:22,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 617 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-12-05 20:14:22,297 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 476 flow [2022-12-05 20:14:22,297 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=476, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2022-12-05 20:14:22,297 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 39 predicate places. [2022-12-05 20:14:22,297 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 476 flow [2022-12-05 20:14:22,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:22,298 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:22,298 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:22,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-05 20:14:22,298 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:22,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:22,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1446291715, now seen corresponding path program 4 times [2022-12-05 20:14:22,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:22,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612170525] [2022-12-05 20:14:22,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:22,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:22,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612170525] [2022-12-05 20:14:22,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612170525] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18338598] [2022-12-05 20:14:22,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 20:14:22,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:22,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:22,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:14:22,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 20:14:22,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 20:14:22,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:22,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-05 20:14:22,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:22,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:22,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18338598] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:22,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:22,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-05 20:14:22,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457975995] [2022-12-05 20:14:22,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:22,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 20:14:22,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:22,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 20:14:22,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-05 20:14:22,569 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:22,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 43 transitions, 476 flow. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:22,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:22,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:22,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:22,734 INFO L130 PetriNetUnfolder]: 192/343 cut-off events. [2022-12-05 20:14:22,735 INFO L131 PetriNetUnfolder]: For 2700/2700 co-relation queries the response was YES. [2022-12-05 20:14:22,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1694 conditions, 343 events. 192/343 cut-off events. For 2700/2700 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1204 event pairs, 41 based on Foata normal form. 24/367 useless extension candidates. Maximal degree in co-relation 1662. Up to 181 conditions per place. [2022-12-05 20:14:22,738 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 45 selfloop transitions, 19 changer transitions 19/83 dead transitions. [2022-12-05 20:14:22,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 916 flow [2022-12-05 20:14:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 20:14:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 20:14:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 65 transitions. [2022-12-05 20:14:22,741 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2022-12-05 20:14:22,741 INFO L175 Difference]: Start difference. First operand has 57 places, 43 transitions, 476 flow. Second operand 12 states and 65 transitions. [2022-12-05 20:14:22,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 916 flow [2022-12-05 20:14:22,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 83 transitions, 861 flow, removed 10 selfloop flow, removed 5 redundant places. [2022-12-05 20:14:22,747 INFO L231 Difference]: Finished difference. Result has 69 places, 49 transitions, 586 flow [2022-12-05 20:14:22,747 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=586, PETRI_PLACES=69, PETRI_TRANSITIONS=49} [2022-12-05 20:14:22,748 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 51 predicate places. [2022-12-05 20:14:22,748 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 49 transitions, 586 flow [2022-12-05 20:14:22,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:22,748 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:22,748 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:22,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 20:14:22,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:22,953 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:22,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1439141875, now seen corresponding path program 5 times [2022-12-05 20:14:22,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:22,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7746535] [2022-12-05 20:14:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:22,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:23,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:23,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7746535] [2022-12-05 20:14:23,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7746535] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:23,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701328445] [2022-12-05 20:14:23,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 20:14:23,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:23,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:23,073 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:14:23,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 20:14:23,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 20:14:23,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:23,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-05 20:14:23,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:23,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:23,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701328445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:23,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:23,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-05 20:14:23,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106245508] [2022-12-05 20:14:23,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:23,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 20:14:23,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:23,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 20:14:23,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-05 20:14:23,244 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:23,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 49 transitions, 586 flow. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:23,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:23,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:23,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:23,511 INFO L130 PetriNetUnfolder]: 254/459 cut-off events. [2022-12-05 20:14:23,511 INFO L131 PetriNetUnfolder]: For 6945/6945 co-relation queries the response was YES. [2022-12-05 20:14:23,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2615 conditions, 459 events. 254/459 cut-off events. For 6945/6945 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1800 event pairs, 28 based on Foata normal form. 28/487 useless extension candidates. Maximal degree in co-relation 2577. Up to 131 conditions per place. [2022-12-05 20:14:23,514 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 46 selfloop transitions, 44 changer transitions 29/119 dead transitions. [2022-12-05 20:14:23,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 119 transitions, 1453 flow [2022-12-05 20:14:23,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-05 20:14:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-05 20:14:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 97 transitions. [2022-12-05 20:14:23,515 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.41452991452991456 [2022-12-05 20:14:23,515 INFO L175 Difference]: Start difference. First operand has 69 places, 49 transitions, 586 flow. Second operand 18 states and 97 transitions. [2022-12-05 20:14:23,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 119 transitions, 1453 flow [2022-12-05 20:14:23,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 119 transitions, 1310 flow, removed 59 selfloop flow, removed 5 redundant places. [2022-12-05 20:14:23,526 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 944 flow [2022-12-05 20:14:23,526 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=944, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2022-12-05 20:14:23,526 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 73 predicate places. [2022-12-05 20:14:23,527 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 944 flow [2022-12-05 20:14:23,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:23,527 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:23,527 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:23,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 20:14:23,732 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,SelfDestructingSolverStorable7 [2022-12-05 20:14:23,733 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:23,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:23,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2030635239, now seen corresponding path program 6 times [2022-12-05 20:14:23,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:23,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083398608] [2022-12-05 20:14:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:23,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:23,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:23,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083398608] [2022-12-05 20:14:23,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083398608] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:23,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358933815] [2022-12-05 20:14:23,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 20:14:23,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:23,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:23,905 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:14:23,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 20:14:23,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 20:14:23,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:23,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 20:14:23,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:23,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:24,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358933815] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:24,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:24,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-05 20:14:24,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918013129] [2022-12-05 20:14:24,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:24,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 20:14:24,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:24,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 20:14:24,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-05 20:14:24,050 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:24,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 944 flow. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:24,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:24,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:24,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:24,356 INFO L130 PetriNetUnfolder]: 338/619 cut-off events. [2022-12-05 20:14:24,356 INFO L131 PetriNetUnfolder]: For 15401/15401 co-relation queries the response was YES. [2022-12-05 20:14:24,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4526 conditions, 619 events. 338/619 cut-off events. For 15401/15401 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2640 event pairs, 27 based on Foata normal form. 24/643 useless extension candidates. Maximal degree in co-relation 4478. Up to 207 conditions per place. [2022-12-05 20:14:24,361 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 56 selfloop transitions, 60 changer transitions 19/135 dead transitions. [2022-12-05 20:14:24,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 135 transitions, 2183 flow [2022-12-05 20:14:24,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-05 20:14:24,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-05 20:14:24,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 92 transitions. [2022-12-05 20:14:24,363 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.39316239316239315 [2022-12-05 20:14:24,363 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 944 flow. Second operand 18 states and 92 transitions. [2022-12-05 20:14:24,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 135 transitions, 2183 flow [2022-12-05 20:14:24,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 135 transitions, 1903 flow, removed 130 selfloop flow, removed 4 redundant places. [2022-12-05 20:14:24,400 INFO L231 Difference]: Finished difference. Result has 112 places, 82 transitions, 1311 flow [2022-12-05 20:14:24,401 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1311, PETRI_PLACES=112, PETRI_TRANSITIONS=82} [2022-12-05 20:14:24,401 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 94 predicate places. [2022-12-05 20:14:24,401 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 82 transitions, 1311 flow [2022-12-05 20:14:24,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:24,401 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:24,401 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:24,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 20:14:24,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:24,607 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:24,607 INFO L85 PathProgramCache]: Analyzing trace with hash -325615129, now seen corresponding path program 7 times [2022-12-05 20:14:24,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:24,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495932986] [2022-12-05 20:14:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:24,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:24,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:24,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495932986] [2022-12-05 20:14:24,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495932986] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:24,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279079041] [2022-12-05 20:14:24,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 20:14:24,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:24,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:24,705 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:14:24,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 20:14:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:24,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 20:14:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:24,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:24,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279079041] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:24,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:24,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-05 20:14:24,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950554610] [2022-12-05 20:14:24,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:24,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 20:14:24,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:24,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 20:14:24,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-12-05 20:14:24,841 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:24,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 82 transitions, 1311 flow. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:24,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:24,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:24,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:25,250 INFO L130 PetriNetUnfolder]: 398/727 cut-off events. [2022-12-05 20:14:25,250 INFO L131 PetriNetUnfolder]: For 29807/29807 co-relation queries the response was YES. [2022-12-05 20:14:25,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6058 conditions, 727 events. 398/727 cut-off events. For 29807/29807 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3192 event pairs, 12 based on Foata normal form. 28/755 useless extension candidates. Maximal degree in co-relation 6003. Up to 246 conditions per place. [2022-12-05 20:14:25,256 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 46 selfloop transitions, 86 changer transitions 38/170 dead transitions. [2022-12-05 20:14:25,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 170 transitions, 3081 flow [2022-12-05 20:14:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 20:14:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 20:14:25,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 116 transitions. [2022-12-05 20:14:25,258 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.40559440559440557 [2022-12-05 20:14:25,258 INFO L175 Difference]: Start difference. First operand has 112 places, 82 transitions, 1311 flow. Second operand 22 states and 116 transitions. [2022-12-05 20:14:25,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 170 transitions, 3081 flow [2022-12-05 20:14:25,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 170 transitions, 2497 flow, removed 252 selfloop flow, removed 12 redundant places. [2022-12-05 20:14:25,317 INFO L231 Difference]: Finished difference. Result has 132 places, 103 transitions, 1774 flow [2022-12-05 20:14:25,317 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1774, PETRI_PLACES=132, PETRI_TRANSITIONS=103} [2022-12-05 20:14:25,318 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 114 predicate places. [2022-12-05 20:14:25,318 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 103 transitions, 1774 flow [2022-12-05 20:14:25,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:25,318 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:25,318 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:25,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 20:14:25,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:25,519 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:25,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:25,519 INFO L85 PathProgramCache]: Analyzing trace with hash 887507261, now seen corresponding path program 8 times [2022-12-05 20:14:25,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:25,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797409228] [2022-12-05 20:14:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:25,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:25,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:25,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797409228] [2022-12-05 20:14:25,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797409228] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:25,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3682683] [2022-12-05 20:14:25,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 20:14:25,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:25,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:25,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:14:25,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 20:14:25,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 20:14:25,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:25,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 20:14:25,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:25,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:25,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3682683] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:25,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:25,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-12-05 20:14:25,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873456162] [2022-12-05 20:14:25,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:25,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 20:14:25,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:25,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 20:14:25,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-12-05 20:14:25,815 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:25,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 103 transitions, 1774 flow. Second operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:25,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:25,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:25,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:26,486 INFO L130 PetriNetUnfolder]: 546/975 cut-off events. [2022-12-05 20:14:26,486 INFO L131 PetriNetUnfolder]: For 45988/45988 co-relation queries the response was YES. [2022-12-05 20:14:26,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9009 conditions, 975 events. 546/975 cut-off events. For 45988/45988 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4214 event pairs, 15 based on Foata normal form. 36/1011 useless extension candidates. Maximal degree in co-relation 8946. Up to 338 conditions per place. [2022-12-05 20:14:26,496 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 60 selfloop transitions, 123 changer transitions 66/249 dead transitions. [2022-12-05 20:14:26,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 249 transitions, 5042 flow [2022-12-05 20:14:26,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-05 20:14:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-05 20:14:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 182 transitions. [2022-12-05 20:14:26,498 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2022-12-05 20:14:26,498 INFO L175 Difference]: Start difference. First operand has 132 places, 103 transitions, 1774 flow. Second operand 36 states and 182 transitions. [2022-12-05 20:14:26,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 249 transitions, 5042 flow [2022-12-05 20:14:26,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 249 transitions, 4403 flow, removed 281 selfloop flow, removed 14 redundant places. [2022-12-05 20:14:26,562 INFO L231 Difference]: Finished difference. Result has 171 places, 140 transitions, 2813 flow [2022-12-05 20:14:26,562 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2813, PETRI_PLACES=171, PETRI_TRANSITIONS=140} [2022-12-05 20:14:26,563 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 153 predicate places. [2022-12-05 20:14:26,563 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 140 transitions, 2813 flow [2022-12-05 20:14:26,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:26,563 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:26,563 INFO L213 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:26,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-05 20:14:26,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-05 20:14:26,768 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:26,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:26,769 INFO L85 PathProgramCache]: Analyzing trace with hash -968968222, now seen corresponding path program 9 times [2022-12-05 20:14:26,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:26,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311458445] [2022-12-05 20:14:26,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:26,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:27,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:27,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311458445] [2022-12-05 20:14:27,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311458445] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:27,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479857291] [2022-12-05 20:14:27,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 20:14:27,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:27,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:27,014 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:14:27,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 20:14:27,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-05 20:14:27,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:27,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-05 20:14:27,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:27,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:27,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479857291] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:27,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:27,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-12-05 20:14:27,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588132691] [2022-12-05 20:14:27,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:27,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-05 20:14:27,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:27,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-05 20:14:27,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2022-12-05 20:14:27,440 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:27,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 140 transitions, 2813 flow. Second operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:27,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:27,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:27,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:28,037 INFO L130 PetriNetUnfolder]: 682/1247 cut-off events. [2022-12-05 20:14:28,037 INFO L131 PetriNetUnfolder]: For 95718/95718 co-relation queries the response was YES. [2022-12-05 20:14:28,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14334 conditions, 1247 events. 682/1247 cut-off events. For 95718/95718 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5732 event pairs, 103 based on Foata normal form. 24/1271 useless extension candidates. Maximal degree in co-relation 14258. Up to 474 conditions per place. [2022-12-05 20:14:28,101 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 115 selfloop transitions, 100 changer transitions 71/286 dead transitions. [2022-12-05 20:14:28,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 286 transitions, 7110 flow [2022-12-05 20:14:28,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-05 20:14:28,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-05 20:14:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 171 transitions. [2022-12-05 20:14:28,103 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2022-12-05 20:14:28,103 INFO L175 Difference]: Start difference. First operand has 171 places, 140 transitions, 2813 flow. Second operand 38 states and 171 transitions. [2022-12-05 20:14:28,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 286 transitions, 7110 flow [2022-12-05 20:14:28,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 286 transitions, 5475 flow, removed 785 selfloop flow, removed 13 redundant places. [2022-12-05 20:14:28,301 INFO L231 Difference]: Finished difference. Result has 203 places, 174 transitions, 3069 flow [2022-12-05 20:14:28,302 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3069, PETRI_PLACES=203, PETRI_TRANSITIONS=174} [2022-12-05 20:14:28,302 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 185 predicate places. [2022-12-05 20:14:28,302 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 174 transitions, 3069 flow [2022-12-05 20:14:28,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:28,302 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:28,302 INFO L213 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:28,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 20:14:28,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:28,508 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:28,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:28,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1867846858, now seen corresponding path program 10 times [2022-12-05 20:14:28,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:28,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203278580] [2022-12-05 20:14:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:28,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:28,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:28,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203278580] [2022-12-05 20:14:28,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203278580] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:28,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076418120] [2022-12-05 20:14:28,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 20:14:28,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:28,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:28,751 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:14:28,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 20:14:28,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 20:14:28,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:28,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-05 20:14:28,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:28,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:29,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076418120] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:29,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:29,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-12-05 20:14:29,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688538830] [2022-12-05 20:14:29,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:29,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-05 20:14:29,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:29,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-05 20:14:29,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2022-12-05 20:14:29,094 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:29,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 174 transitions, 3069 flow. Second operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:29,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:29,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:29,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:30,009 INFO L130 PetriNetUnfolder]: 874/1623 cut-off events. [2022-12-05 20:14:30,009 INFO L131 PetriNetUnfolder]: For 157750/157750 co-relation queries the response was YES. [2022-12-05 20:14:30,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18396 conditions, 1623 events. 874/1623 cut-off events. For 157750/157750 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 8004 event pairs, 44 based on Foata normal form. 32/1655 useless extension candidates. Maximal degree in co-relation 18316. Up to 658 conditions per place. [2022-12-05 20:14:30,030 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 84 selfloop transitions, 184 changer transitions 79/347 dead transitions. [2022-12-05 20:14:30,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 347 transitions, 7842 flow [2022-12-05 20:14:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-05 20:14:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-05 20:14:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 194 transitions. [2022-12-05 20:14:30,031 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3553113553113553 [2022-12-05 20:14:30,031 INFO L175 Difference]: Start difference. First operand has 203 places, 174 transitions, 3069 flow. Second operand 42 states and 194 transitions. [2022-12-05 20:14:30,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 347 transitions, 7842 flow [2022-12-05 20:14:30,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 347 transitions, 7183 flow, removed 262 selfloop flow, removed 17 redundant places. [2022-12-05 20:14:30,413 INFO L231 Difference]: Finished difference. Result has 239 places, 224 transitions, 4409 flow [2022-12-05 20:14:30,413 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=2598, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=4409, PETRI_PLACES=239, PETRI_TRANSITIONS=224} [2022-12-05 20:14:30,414 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 221 predicate places. [2022-12-05 20:14:30,414 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 224 transitions, 4409 flow [2022-12-05 20:14:30,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:30,414 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:30,414 INFO L213 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:30,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-05 20:14:30,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:30,616 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:30,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:30,616 INFO L85 PathProgramCache]: Analyzing trace with hash 103487634, now seen corresponding path program 11 times [2022-12-05 20:14:30,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:30,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250654286] [2022-12-05 20:14:30,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:30,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:30,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:30,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250654286] [2022-12-05 20:14:30,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250654286] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:30,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574351117] [2022-12-05 20:14:30,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 20:14:30,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:30,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:30,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:14:30,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-05 20:14:30,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-05 20:14:30,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:30,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-05 20:14:30,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:30,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:31,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574351117] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:31,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:31,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-12-05 20:14:31,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911820725] [2022-12-05 20:14:31,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:31,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-05 20:14:31,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-05 20:14:31,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2022-12-05 20:14:31,204 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:31,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 224 transitions, 4409 flow. Second operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:31,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:31,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:31,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:32,344 INFO L130 PetriNetUnfolder]: 1006/1867 cut-off events. [2022-12-05 20:14:32,344 INFO L131 PetriNetUnfolder]: For 253563/253563 co-relation queries the response was YES. [2022-12-05 20:14:32,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23574 conditions, 1867 events. 1006/1867 cut-off events. For 253563/253563 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 9498 event pairs, 16 based on Foata normal form. 36/1903 useless extension candidates. Maximal degree in co-relation 23481. Up to 770 conditions per place. [2022-12-05 20:14:32,365 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 75 selfloop transitions, 234 changer transitions 81/390 dead transitions. [2022-12-05 20:14:32,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 390 transitions, 9461 flow [2022-12-05 20:14:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-05 20:14:32,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-05 20:14:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 213 transitions. [2022-12-05 20:14:32,367 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3723776223776224 [2022-12-05 20:14:32,367 INFO L175 Difference]: Start difference. First operand has 239 places, 224 transitions, 4409 flow. Second operand 44 states and 213 transitions. [2022-12-05 20:14:32,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 390 transitions, 9461 flow [2022-12-05 20:14:32,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 390 transitions, 8517 flow, removed 381 selfloop flow, removed 16 redundant places. [2022-12-05 20:14:32,847 INFO L231 Difference]: Finished difference. Result has 280 places, 259 transitions, 5409 flow [2022-12-05 20:14:32,847 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=3493, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5409, PETRI_PLACES=280, PETRI_TRANSITIONS=259} [2022-12-05 20:14:32,848 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 262 predicate places. [2022-12-05 20:14:32,848 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 259 transitions, 5409 flow [2022-12-05 20:14:32,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:32,848 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:32,848 INFO L213 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:32,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-05 20:14:33,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-05 20:14:33,053 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:33,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1628516673, now seen corresponding path program 12 times [2022-12-05 20:14:33,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:33,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193190040] [2022-12-05 20:14:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:33,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:33,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:33,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193190040] [2022-12-05 20:14:33,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193190040] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:33,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136779277] [2022-12-05 20:14:33,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 20:14:33,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:33,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:33,269 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:14:33,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-05 20:14:33,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-12-05 20:14:33,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:33,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-05 20:14:33,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:33,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:33,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136779277] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:33,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:33,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2022-12-05 20:14:33,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354557975] [2022-12-05 20:14:33,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:33,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-05 20:14:33,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:33,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-05 20:14:33,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2022-12-05 20:14:33,600 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:33,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 259 transitions, 5409 flow. Second operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:33,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:33,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:33,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:34,723 INFO L130 PetriNetUnfolder]: 1054/1951 cut-off events. [2022-12-05 20:14:34,723 INFO L131 PetriNetUnfolder]: For 351585/351585 co-relation queries the response was YES. [2022-12-05 20:14:34,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27466 conditions, 1951 events. 1054/1951 cut-off events. For 351585/351585 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 9934 event pairs, 20 based on Foata normal form. 20/1971 useless extension candidates. Maximal degree in co-relation 27358. Up to 790 conditions per place. [2022-12-05 20:14:34,747 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 68 selfloop transitions, 248 changer transitions 74/390 dead transitions. [2022-12-05 20:14:34,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 390 transitions, 10404 flow [2022-12-05 20:14:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-05 20:14:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-05 20:14:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 191 transitions. [2022-12-05 20:14:34,749 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36730769230769234 [2022-12-05 20:14:34,749 INFO L175 Difference]: Start difference. First operand has 280 places, 259 transitions, 5409 flow. Second operand 40 states and 191 transitions. [2022-12-05 20:14:34,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 390 transitions, 10404 flow [2022-12-05 20:14:35,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 390 transitions, 9123 flow, removed 507 selfloop flow, removed 25 redundant places. [2022-12-05 20:14:35,583 INFO L231 Difference]: Finished difference. Result has 302 places, 271 transitions, 5572 flow [2022-12-05 20:14:35,583 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=4222, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=5572, PETRI_PLACES=302, PETRI_TRANSITIONS=271} [2022-12-05 20:14:35,583 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 284 predicate places. [2022-12-05 20:14:35,584 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 271 transitions, 5572 flow [2022-12-05 20:14:35,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:35,584 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:35,584 INFO L213 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:35,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-05 20:14:35,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-05 20:14:35,789 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:35,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:35,789 INFO L85 PathProgramCache]: Analyzing trace with hash 155943686, now seen corresponding path program 13 times [2022-12-05 20:14:35,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:35,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093500928] [2022-12-05 20:14:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:35,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:36,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:36,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093500928] [2022-12-05 20:14:36,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093500928] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:36,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213554879] [2022-12-05 20:14:36,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 20:14:36,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:36,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:36,021 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:14:36,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-05 20:14:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:36,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-05 20:14:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:36,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:36,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213554879] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:36,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:36,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 26 [2022-12-05 20:14:36,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705343308] [2022-12-05 20:14:36,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:36,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-05 20:14:36,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:36,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-05 20:14:36,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-12-05 20:14:36,360 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:36,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 271 transitions, 5572 flow. Second operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:36,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:36,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:36,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:37,539 INFO L130 PetriNetUnfolder]: 1154/2127 cut-off events. [2022-12-05 20:14:37,539 INFO L131 PetriNetUnfolder]: For 431064/431064 co-relation queries the response was YES. [2022-12-05 20:14:37,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31506 conditions, 2127 events. 1154/2127 cut-off events. For 431064/431064 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 10832 event pairs, 15 based on Foata normal form. 20/2147 useless extension candidates. Maximal degree in co-relation 31392. Up to 850 conditions per place. [2022-12-05 20:14:37,564 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 80 selfloop transitions, 275 changer transitions 90/445 dead transitions. [2022-12-05 20:14:37,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 445 transitions, 12204 flow [2022-12-05 20:14:37,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-05 20:14:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-05 20:14:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 232 transitions. [2022-12-05 20:14:37,565 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2022-12-05 20:14:37,565 INFO L175 Difference]: Start difference. First operand has 302 places, 271 transitions, 5572 flow. Second operand 48 states and 232 transitions. [2022-12-05 20:14:37,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 445 transitions, 12204 flow [2022-12-05 20:14:38,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 445 transitions, 10485 flow, removed 654 selfloop flow, removed 32 redundant places. [2022-12-05 20:14:38,545 INFO L231 Difference]: Finished difference. Result has 327 places, 296 transitions, 6320 flow [2022-12-05 20:14:38,545 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=4525, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=6320, PETRI_PLACES=327, PETRI_TRANSITIONS=296} [2022-12-05 20:14:38,546 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 309 predicate places. [2022-12-05 20:14:38,546 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 296 transitions, 6320 flow [2022-12-05 20:14:38,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:38,546 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:38,546 INFO L213 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:38,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-05 20:14:38,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-05 20:14:38,752 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:38,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1235709889, now seen corresponding path program 14 times [2022-12-05 20:14:38,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:38,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619510654] [2022-12-05 20:14:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:38,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-05 20:14:38,787 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-05 20:14:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-05 20:14:38,820 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-05 20:14:38,821 INFO L373 BasicCegarLoop]: Counterexample is feasible [2022-12-05 20:14:38,821 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-05 20:14:38,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-05 20:14:38,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-05 20:14:38,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-05 20:14:38,826 INFO L458 BasicCegarLoop]: Path program histogram: [14, 2, 1] [2022-12-05 20:14:38,830 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 20:14:38,830 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 20:14:38,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 08:14:38 BasicIcfg [2022-12-05 20:14:38,886 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 20:14:38,887 INFO L158 Benchmark]: Toolchain (without parser) took 20778.28ms. Allocated memory was 208.7MB in the beginning and 459.3MB in the end (delta: 250.6MB). Free memory was 184.4MB in the beginning and 162.8MB in the end (delta: 21.5MB). Peak memory consumption was 273.1MB. Max. memory is 8.0GB. [2022-12-05 20:14:38,887 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 208.7MB. Free memory was 185.0MB in the beginning and 184.9MB in the end (delta: 89.5kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 20:14:38,887 INFO L158 Benchmark]: CACSL2BoogieTranslator took 360.99ms. Allocated memory is still 208.7MB. Free memory was 183.8MB in the beginning and 163.9MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2022-12-05 20:14:38,887 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.61ms. Allocated memory is still 208.7MB. Free memory was 163.9MB in the beginning and 161.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 20:14:38,887 INFO L158 Benchmark]: Boogie Preprocessor took 25.96ms. Allocated memory is still 208.7MB. Free memory was 161.9MB in the beginning and 160.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 20:14:38,887 INFO L158 Benchmark]: RCFGBuilder took 315.81ms. Allocated memory is still 208.7MB. Free memory was 160.3MB in the beginning and 147.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-05 20:14:38,888 INFO L158 Benchmark]: TraceAbstraction took 20038.04ms. Allocated memory was 208.7MB in the beginning and 459.3MB in the end (delta: 250.6MB). Free memory was 147.3MB in the beginning and 162.8MB in the end (delta: -15.6MB). Peak memory consumption was 236.4MB. Max. memory is 8.0GB. [2022-12-05 20:14:38,888 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 208.7MB. Free memory was 185.0MB in the beginning and 184.9MB in the end (delta: 89.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 360.99ms. Allocated memory is still 208.7MB. Free memory was 183.8MB in the beginning and 163.9MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 31.61ms. Allocated memory is still 208.7MB. Free memory was 163.9MB in the beginning and 161.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.96ms. Allocated memory is still 208.7MB. Free memory was 161.9MB in the beginning and 160.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 315.81ms. Allocated memory is still 208.7MB. Free memory was 160.3MB in the beginning and 147.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 20038.04ms. Allocated memory was 208.7MB in the beginning and 459.3MB in the end (delta: 250.6MB). Free memory was 147.3MB in the beginning and 162.8MB in the end (delta: -15.6MB). Peak memory consumption was 236.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 66 PlacesBefore, 18 PlacesAfterwards, 64 TransitionsBefore, 13 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 18 TrivialYvCompositions, 30 ConcurrentYvCompositions, 3 ChoiceCompositions, 51 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 613, independent: 598, independent conditional: 598, independent unconditional: 0, dependent: 15, dependent conditional: 15, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 613, independent: 598, independent conditional: 0, independent unconditional: 598, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 613, independent: 598, independent conditional: 0, independent unconditional: 598, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 613, independent: 598, independent conditional: 0, independent unconditional: 598, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 598, independent: 588, independent conditional: 0, independent unconditional: 588, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 598, independent: 588, independent conditional: 0, independent unconditional: 588, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 10, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 27, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 613, independent: 10, independent conditional: 0, independent unconditional: 10, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 598, unknown conditional: 0, unknown unconditional: 598] , Statistics on independence cache: Total cache size (in pairs): 1033, Positive cache size: 1023, Positive conditional cache size: 0, Positive unconditional cache size: 1023, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-2] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=-1] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L716] 0 int condI = i >= (2*10 +6); VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=6, k=0, k=1] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L719] 0 int condJ = j >= (2*10 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=10, k=10] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 19.9s, OverallIterations: 17, TraceHistogramMax: 10, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 10.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4014 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4014 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 514 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2858 IncrementalHoareTripleChecker+Invalid, 3372 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 514 mSolverCounterUnsat, 0 mSDtfsCounter, 2858 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 763 GetRequests, 204 SyntacticMatches, 26 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8843 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6320occurred in iteration=16, InterpolantAutomatonStates: 356, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 436 NumberOfCodeBlocks, 436 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 2326 SizeOfPredicates, 98 NumberOfNonLiveVariables, 1590 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 36 InterpolantComputations, 6 PerfectInterpolantSequences, 0/816 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-05 20:14:38,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...