/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/weaver/popl20-simple-array-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 22:08:39,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 22:08:39,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 22:08:39,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 22:08:39,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 22:08:39,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 22:08:39,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 22:08:39,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 22:08:39,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 22:08:39,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 22:08:39,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 22:08:39,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 22:08:39,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 22:08:39,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 22:08:39,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 22:08:39,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 22:08:39,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 22:08:39,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 22:08:39,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 22:08:39,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 22:08:39,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 22:08:39,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 22:08:39,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 22:08:39,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 22:08:39,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 22:08:39,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 22:08:39,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 22:08:39,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 22:08:39,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 22:08:39,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 22:08:39,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 22:08:39,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 22:08:39,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 22:08:39,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 22:08:39,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 22:08:39,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 22:08:39,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 22:08:39,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 22:08:39,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 22:08:39,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 22:08:39,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 22:08:39,604 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 22:08:39,628 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 22:08:39,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 22:08:39,630 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 22:08:39,630 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 22:08:39,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 22:08:39,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 22:08:39,631 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 22:08:39,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 22:08:39,631 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 22:08:39,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 22:08:39,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 22:08:39,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 22:08:39,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 22:08:39,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 22:08:39,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 22:08:39,633 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 22:08:39,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 22:08:39,633 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 22:08:39,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 22:08:39,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 22:08:39,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 22:08:39,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 22:08:39,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 22:08:39,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:08:39,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 22:08:39,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 22:08:39,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 22:08:39,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 22:08:39,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 22:08:39,639 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 22:08:39,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 22:08:39,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 22:08:39,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 22:08:39,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 22:08:39,926 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 22:08:39,926 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 22:08:39,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2022-12-05 22:08:40,924 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 22:08:41,133 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 22:08:41,134 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2022-12-05 22:08:41,140 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a54c7ad1/f2ba6850ee24469ca79db0a62937a033/FLAG8d0beb319 [2022-12-05 22:08:41,154 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a54c7ad1/f2ba6850ee24469ca79db0a62937a033 [2022-12-05 22:08:41,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 22:08:41,158 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 22:08:41,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 22:08:41,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 22:08:41,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 22:08:41,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:08:41" (1/1) ... [2022-12-05 22:08:41,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4327d837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:41, skipping insertion in model container [2022-12-05 22:08:41,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:08:41" (1/1) ... [2022-12-05 22:08:41,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 22:08:41,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 22:08:41,314 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:08:41,316 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:08:41,316 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:08:41,317 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:08:41,318 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:08:41,319 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:08:41,320 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:08:41,325 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:08:41,334 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-12-05 22:08:41,348 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:08:41,354 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 22:08:41,372 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:08:41,372 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:08:41,373 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:08:41,373 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:08:41,375 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:08:41,375 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:08:41,376 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:08:41,380 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:08:41,386 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-12-05 22:08:41,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:08:41,407 INFO L208 MainTranslator]: Completed translation [2022-12-05 22:08:41,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:41 WrapperNode [2022-12-05 22:08:41,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 22:08:41,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 22:08:41,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 22:08:41,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 22:08:41,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:41" (1/1) ... [2022-12-05 22:08:41,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:41" (1/1) ... [2022-12-05 22:08:41,451 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 121 [2022-12-05 22:08:41,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 22:08:41,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 22:08:41,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 22:08:41,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 22:08:41,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:41" (1/1) ... [2022-12-05 22:08:41,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:41" (1/1) ... [2022-12-05 22:08:41,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:41" (1/1) ... [2022-12-05 22:08:41,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:41" (1/1) ... [2022-12-05 22:08:41,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:41" (1/1) ... [2022-12-05 22:08:41,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:41" (1/1) ... [2022-12-05 22:08:41,486 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:41" (1/1) ... [2022-12-05 22:08:41,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:41" (1/1) ... [2022-12-05 22:08:41,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 22:08:41,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 22:08:41,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 22:08:41,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 22:08:41,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:41" (1/1) ... [2022-12-05 22:08:41,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:08:41,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:41,519 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 22:08:41,526 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 22:08:41,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 22:08:41,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 22:08:41,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 22:08:41,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 22:08:41,548 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 22:08:41,548 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 22:08:41,548 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 22:08:41,548 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 22:08:41,548 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-05 22:08:41,548 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-05 22:08:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 22:08:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 22:08:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 22:08:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-05 22:08:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 22:08:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 22:08:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 22:08:41,550 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 22:08:41,681 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 22:08:41,684 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 22:08:41,895 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 22:08:41,913 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 22:08:41,913 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-05 22:08:41,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:08:41 BoogieIcfgContainer [2022-12-05 22:08:41,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 22:08:41,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 22:08:41,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 22:08:41,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 22:08:41,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 10:08:41" (1/3) ... [2022-12-05 22:08:41,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602ebec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:08:41, skipping insertion in model container [2022-12-05 22:08:41,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:08:41" (2/3) ... [2022-12-05 22:08:41,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602ebec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:08:41, skipping insertion in model container [2022-12-05 22:08:41,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:08:41" (3/3) ... [2022-12-05 22:08:41,920 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2022-12-05 22:08:41,932 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 22:08:41,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 22:08:41,932 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 22:08:41,987 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-05 22:08:42,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 171 transitions, 366 flow [2022-12-05 22:08:42,107 INFO L130 PetriNetUnfolder]: 16/168 cut-off events. [2022-12-05 22:08:42,107 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 22:08:42,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 168 events. 16/168 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 115 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 129. Up to 3 conditions per place. [2022-12-05 22:08:42,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 171 transitions, 366 flow [2022-12-05 22:08:42,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 158 transitions, 334 flow [2022-12-05 22:08:42,123 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:08:42,134 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 158 transitions, 334 flow [2022-12-05 22:08:42,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 158 transitions, 334 flow [2022-12-05 22:08:42,181 INFO L130 PetriNetUnfolder]: 16/158 cut-off events. [2022-12-05 22:08:42,182 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 22:08:42,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 158 events. 16/158 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 114 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 129. Up to 3 conditions per place. [2022-12-05 22:08:42,185 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 158 transitions, 334 flow [2022-12-05 22:08:42,185 INFO L188 LiptonReduction]: Number of co-enabled transitions 1720 [2022-12-05 22:08:47,257 INFO L203 LiptonReduction]: Total number of compositions: 129 [2022-12-05 22:08:47,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 22:08:47,272 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;@38fe8b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 22:08:47,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-05 22:08:47,291 INFO L130 PetriNetUnfolder]: 6/28 cut-off events. [2022-12-05 22:08:47,292 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 22:08:47,292 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:47,292 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:47,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:47,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:47,296 INFO L85 PathProgramCache]: Analyzing trace with hash -662271631, now seen corresponding path program 1 times [2022-12-05 22:08:47,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:47,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144386936] [2022-12-05 22:08:47,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:47,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:47,925 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 22:08:47,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:47,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144386936] [2022-12-05 22:08:47,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144386936] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:08:47,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:08:47,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 22:08:47,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393157386] [2022-12-05 22:08:47,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:08:47,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:08:47,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:47,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:08:47,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:08:47,951 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2022-12-05 22:08:47,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:47,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:47,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2022-12-05 22:08:47,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:48,160 INFO L130 PetriNetUnfolder]: 853/1153 cut-off events. [2022-12-05 22:08:48,160 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-12-05 22:08:48,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2389 conditions, 1153 events. 853/1153 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4243 event pairs, 310 based on Foata normal form. 1/684 useless extension candidates. Maximal degree in co-relation 1073. Up to 740 conditions per place. [2022-12-05 22:08:48,169 INFO L137 encePairwiseOnDemand]: 23/29 looper letters, 44 selfloop transitions, 5 changer transitions 1/53 dead transitions. [2022-12-05 22:08:48,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 242 flow [2022-12-05 22:08:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:08:48,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:08:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2022-12-05 22:08:48,179 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2022-12-05 22:08:48,180 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 4 states and 63 transitions. [2022-12-05 22:08:48,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 242 flow [2022-12-05 22:08:48,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 53 transitions, 218 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-05 22:08:48,190 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 98 flow [2022-12-05 22:08:48,191 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2022-12-05 22:08:48,194 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2022-12-05 22:08:48,194 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 98 flow [2022-12-05 22:08:48,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:48,194 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:48,194 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:48,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 22:08:48,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:48,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:48,195 INFO L85 PathProgramCache]: Analyzing trace with hash -788667866, now seen corresponding path program 1 times [2022-12-05 22:08:48,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:48,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690963925] [2022-12-05 22:08:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:48,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:48,278 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 22:08:48,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:48,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690963925] [2022-12-05 22:08:48,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690963925] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:48,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571057312] [2022-12-05 22:08:48,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:48,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:48,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:48,281 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 22:08:48,287 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 22:08:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:48,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 22:08:48,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:48,437 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 22:08:48,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:48,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571057312] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:48,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 22:08:48,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2022-12-05 22:08:48,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643355995] [2022-12-05 22:08:48,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:08:48,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:08:48,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:48,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:08:48,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-05 22:08:48,463 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2022-12-05 22:08:48,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 22:08:48,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:48,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2022-12-05 22:08:48,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:48,704 INFO L130 PetriNetUnfolder]: 1608/2187 cut-off events. [2022-12-05 22:08:48,704 INFO L131 PetriNetUnfolder]: For 310/310 co-relation queries the response was YES. [2022-12-05 22:08:48,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4859 conditions, 2187 events. 1608/2187 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 9304 event pairs, 756 based on Foata normal form. 0/1516 useless extension candidates. Maximal degree in co-relation 3832. Up to 1108 conditions per place. [2022-12-05 22:08:48,714 INFO L137 encePairwiseOnDemand]: 24/29 looper letters, 51 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2022-12-05 22:08:48,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 59 transitions, 280 flow [2022-12-05 22:08:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:08:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:08:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2022-12-05 22:08:48,717 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4689655172413793 [2022-12-05 22:08:48,717 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 98 flow. Second operand 5 states and 68 transitions. [2022-12-05 22:08:48,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 59 transitions, 280 flow [2022-12-05 22:08:48,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 59 transitions, 272 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-05 22:08:48,719 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 112 flow [2022-12-05 22:08:48,720 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2022-12-05 22:08:48,720 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2022-12-05 22:08:48,721 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 112 flow [2022-12-05 22:08:48,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 22:08:48,723 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:48,723 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:48,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-05 22:08:48,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:48,928 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:48,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:48,929 INFO L85 PathProgramCache]: Analyzing trace with hash 177933592, now seen corresponding path program 1 times [2022-12-05 22:08:48,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:48,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331184581] [2022-12-05 22:08:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:48,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:48,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:48,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331184581] [2022-12-05 22:08:48,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331184581] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:08:48,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:08:48,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 22:08:48,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840738569] [2022-12-05 22:08:48,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:08:48,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:08:48,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:48,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:08:48,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 22:08:48,995 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-05 22:08:48,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:48,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:48,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-05 22:08:48,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:49,168 INFO L130 PetriNetUnfolder]: 1172/1618 cut-off events. [2022-12-05 22:08:49,168 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2022-12-05 22:08:49,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3414 conditions, 1618 events. 1172/1618 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6393 event pairs, 521 based on Foata normal form. 67/1172 useless extension candidates. Maximal degree in co-relation 2060. Up to 793 conditions per place. [2022-12-05 22:08:49,176 INFO L137 encePairwiseOnDemand]: 23/29 looper letters, 60 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2022-12-05 22:08:49,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 68 transitions, 324 flow [2022-12-05 22:08:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:08:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:08:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2022-12-05 22:08:49,178 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5241379310344828 [2022-12-05 22:08:49,178 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 112 flow. Second operand 5 states and 76 transitions. [2022-12-05 22:08:49,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 68 transitions, 324 flow [2022-12-05 22:08:49,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 68 transitions, 319 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-05 22:08:49,181 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 120 flow [2022-12-05 22:08:49,182 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2022-12-05 22:08:49,182 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2022-12-05 22:08:49,183 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 120 flow [2022-12-05 22:08:49,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:49,183 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:49,183 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:49,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 22:08:49,183 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:49,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:49,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1805842622, now seen corresponding path program 1 times [2022-12-05 22:08:49,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:49,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221643630] [2022-12-05 22:08:49,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:49,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:08:49,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:49,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221643630] [2022-12-05 22:08:49,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221643630] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:49,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565660213] [2022-12-05 22:08:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:49,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:49,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:49,292 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 22:08:49,294 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 22:08:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:49,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 22:08:49,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:08:49,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:08:49,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565660213] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:49,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 22:08:49,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2022-12-05 22:08:49,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222645145] [2022-12-05 22:08:49,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:08:49,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:08:49,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:49,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:08:49,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-05 22:08:49,422 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-05 22:08:49,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 22:08:49,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:49,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-05 22:08:49,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:49,602 INFO L130 PetriNetUnfolder]: 1059/1478 cut-off events. [2022-12-05 22:08:49,603 INFO L131 PetriNetUnfolder]: For 435/459 co-relation queries the response was YES. [2022-12-05 22:08:49,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3295 conditions, 1478 events. 1059/1478 cut-off events. For 435/459 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6036 event pairs, 380 based on Foata normal form. 24/1111 useless extension candidates. Maximal degree in co-relation 1868. Up to 507 conditions per place. [2022-12-05 22:08:49,610 INFO L137 encePairwiseOnDemand]: 23/29 looper letters, 69 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2022-12-05 22:08:49,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 79 transitions, 388 flow [2022-12-05 22:08:49,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 22:08:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 22:08:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2022-12-05 22:08:49,613 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4942528735632184 [2022-12-05 22:08:49,613 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 120 flow. Second operand 6 states and 86 transitions. [2022-12-05 22:08:49,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 79 transitions, 388 flow [2022-12-05 22:08:49,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 79 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-05 22:08:49,617 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 146 flow [2022-12-05 22:08:49,617 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2022-12-05 22:08:49,618 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 12 predicate places. [2022-12-05 22:08:49,619 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 146 flow [2022-12-05 22:08:49,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 22:08:49,619 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:49,619 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:49,626 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 22:08:49,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-05 22:08:49,824 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:49,825 INFO L85 PathProgramCache]: Analyzing trace with hash 48479343, now seen corresponding path program 1 times [2022-12-05 22:08:49,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:49,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473509351] [2022-12-05 22:08:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:49,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:49,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:49,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473509351] [2022-12-05 22:08:49,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473509351] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:08:49,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:08:49,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 22:08:49,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738787000] [2022-12-05 22:08:49,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:08:49,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:08:49,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:49,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:08:49,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 22:08:49,916 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-05 22:08:49,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 22:08:49,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:49,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-05 22:08:49,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:50,052 INFO L130 PetriNetUnfolder]: 611/888 cut-off events. [2022-12-05 22:08:50,052 INFO L131 PetriNetUnfolder]: For 637/705 co-relation queries the response was YES. [2022-12-05 22:08:50,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2365 conditions, 888 events. 611/888 cut-off events. For 637/705 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3378 event pairs, 290 based on Foata normal form. 68/884 useless extension candidates. Maximal degree in co-relation 1678. Up to 614 conditions per place. [2022-12-05 22:08:50,056 INFO L137 encePairwiseOnDemand]: 22/29 looper letters, 26 selfloop transitions, 4 changer transitions 30/62 dead transitions. [2022-12-05 22:08:50,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 326 flow [2022-12-05 22:08:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:08:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:08:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 69 transitions. [2022-12-05 22:08:50,057 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.47586206896551725 [2022-12-05 22:08:50,057 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 146 flow. Second operand 5 states and 69 transitions. [2022-12-05 22:08:50,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 326 flow [2022-12-05 22:08:50,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 322 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-05 22:08:50,059 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 127 flow [2022-12-05 22:08:50,059 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2022-12-05 22:08:50,059 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 16 predicate places. [2022-12-05 22:08:50,059 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 127 flow [2022-12-05 22:08:50,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 22:08:50,060 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:50,060 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:50,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-05 22:08:50,060 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:50,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1863224071, now seen corresponding path program 1 times [2022-12-05 22:08:50,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:50,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866524370] [2022-12-05 22:08:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:50,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:50,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:50,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866524370] [2022-12-05 22:08:50,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866524370] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:50,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955661522] [2022-12-05 22:08:50,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:50,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:50,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:50,137 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 22:08:50,139 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 22:08:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:50,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 22:08:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:50,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:50,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955661522] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:50,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 22:08:50,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2022-12-05 22:08:50,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043874584] [2022-12-05 22:08:50,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:08:50,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:08:50,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:50,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:08:50,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-05 22:08:50,269 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-05 22:08:50,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 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 22:08:50,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:50,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-05 22:08:50,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:50,358 INFO L130 PetriNetUnfolder]: 563/780 cut-off events. [2022-12-05 22:08:50,358 INFO L131 PetriNetUnfolder]: For 497/577 co-relation queries the response was YES. [2022-12-05 22:08:50,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2208 conditions, 780 events. 563/780 cut-off events. For 497/577 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2727 event pairs, 237 based on Foata normal form. 122/810 useless extension candidates. Maximal degree in co-relation 2179. Up to 609 conditions per place. [2022-12-05 22:08:50,363 INFO L137 encePairwiseOnDemand]: 24/29 looper letters, 40 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2022-12-05 22:08:50,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 265 flow [2022-12-05 22:08:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:08:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:08:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2022-12-05 22:08:50,364 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2022-12-05 22:08:50,364 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 127 flow. Second operand 5 states and 52 transitions. [2022-12-05 22:08:50,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 265 flow [2022-12-05 22:08:50,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 235 flow, removed 7 selfloop flow, removed 7 redundant places. [2022-12-05 22:08:50,366 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 121 flow [2022-12-05 22:08:50,366 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2022-12-05 22:08:50,367 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2022-12-05 22:08:50,367 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 121 flow [2022-12-05 22:08:50,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 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 22:08:50,367 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:50,367 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:50,374 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 22:08:50,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:50,572 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:50,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:50,573 INFO L85 PathProgramCache]: Analyzing trace with hash -811544718, now seen corresponding path program 1 times [2022-12-05 22:08:50,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:50,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980845700] [2022-12-05 22:08:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:50,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:50,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:50,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980845700] [2022-12-05 22:08:50,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980845700] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:50,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857213584] [2022-12-05 22:08:50,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:50,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:50,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:50,681 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 22:08:50,707 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 22:08:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:50,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 22:08:50,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:50,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:50,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857213584] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:50,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 22:08:50,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2022-12-05 22:08:50,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727315194] [2022-12-05 22:08:50,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:08:50,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:08:50,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:50,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:08:50,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-05 22:08:50,832 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-05 22:08:50,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 22:08:50,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:50,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-05 22:08:50,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:50,942 INFO L130 PetriNetUnfolder]: 515/725 cut-off events. [2022-12-05 22:08:50,942 INFO L131 PetriNetUnfolder]: For 678/858 co-relation queries the response was YES. [2022-12-05 22:08:50,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2049 conditions, 725 events. 515/725 cut-off events. For 678/858 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2303 event pairs, 191 based on Foata normal form. 180/800 useless extension candidates. Maximal degree in co-relation 2025. Up to 395 conditions per place. [2022-12-05 22:08:50,945 INFO L137 encePairwiseOnDemand]: 22/29 looper letters, 39 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2022-12-05 22:08:50,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 262 flow [2022-12-05 22:08:50,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:08:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:08:50,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2022-12-05 22:08:50,947 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.35172413793103446 [2022-12-05 22:08:50,947 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 121 flow. Second operand 5 states and 51 transitions. [2022-12-05 22:08:50,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 262 flow [2022-12-05 22:08:50,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 251 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-05 22:08:50,948 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 144 flow [2022-12-05 22:08:50,948 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2022-12-05 22:08:50,949 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2022-12-05 22:08:50,949 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 144 flow [2022-12-05 22:08:50,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 22:08:50,949 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:50,949 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:50,956 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 22:08:51,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:51,154 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1827960664, now seen corresponding path program 1 times [2022-12-05 22:08:51,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:51,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654604095] [2022-12-05 22:08:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:51,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 22:08:51,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:51,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654604095] [2022-12-05 22:08:51,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654604095] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:08:51,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:08:51,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:08:51,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077438283] [2022-12-05 22:08:51,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:08:51,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:08:51,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:51,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:08:51,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:08:51,292 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-05 22:08:51,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 22:08:51,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:51,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-05 22:08:51,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:51,373 INFO L130 PetriNetUnfolder]: 492/700 cut-off events. [2022-12-05 22:08:51,374 INFO L131 PetriNetUnfolder]: For 695/827 co-relation queries the response was YES. [2022-12-05 22:08:51,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2250 conditions, 700 events. 492/700 cut-off events. For 695/827 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2147 event pairs, 83 based on Foata normal form. 132/777 useless extension candidates. Maximal degree in co-relation 2224. Up to 556 conditions per place. [2022-12-05 22:08:51,377 INFO L137 encePairwiseOnDemand]: 25/29 looper letters, 48 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2022-12-05 22:08:51,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 319 flow [2022-12-05 22:08:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:08:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:08:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 54 transitions. [2022-12-05 22:08:51,378 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.46551724137931033 [2022-12-05 22:08:51,378 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 144 flow. Second operand 4 states and 54 transitions. [2022-12-05 22:08:51,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 319 flow [2022-12-05 22:08:51,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 311 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-05 22:08:51,380 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 171 flow [2022-12-05 22:08:51,380 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2022-12-05 22:08:51,381 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 13 predicate places. [2022-12-05 22:08:51,381 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 171 flow [2022-12-05 22:08:51,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 22:08:51,381 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:51,381 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:51,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-05 22:08:51,381 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:51,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1334264808, now seen corresponding path program 2 times [2022-12-05 22:08:51,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:51,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997601968] [2022-12-05 22:08:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:51,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:51,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:51,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997601968] [2022-12-05 22:08:51,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997601968] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:51,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478240601] [2022-12-05 22:08:51,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:08:51,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:51,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:51,484 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 22:08:51,486 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 22:08:51,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:08:51,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:51,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 22:08:51,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:51,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:51,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478240601] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:51,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:51,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-05 22:08:51,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925118450] [2022-12-05 22:08:51,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:51,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 22:08:51,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:51,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 22:08:51,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-05 22:08:51,767 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2022-12-05 22:08:51,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 171 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:51,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:51,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2022-12-05 22:08:51,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:52,008 INFO L130 PetriNetUnfolder]: 793/1129 cut-off events. [2022-12-05 22:08:52,008 INFO L131 PetriNetUnfolder]: For 1637/1797 co-relation queries the response was YES. [2022-12-05 22:08:52,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3691 conditions, 1129 events. 793/1129 cut-off events. For 1637/1797 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4023 event pairs, 238 based on Foata normal form. 212/1314 useless extension candidates. Maximal degree in co-relation 3663. Up to 590 conditions per place. [2022-12-05 22:08:52,014 INFO L137 encePairwiseOnDemand]: 24/29 looper letters, 79 selfloop transitions, 14 changer transitions 6/100 dead transitions. [2022-12-05 22:08:52,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 100 transitions, 616 flow [2022-12-05 22:08:52,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 22:08:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 22:08:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2022-12-05 22:08:52,015 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2022-12-05 22:08:52,015 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 171 flow. Second operand 8 states and 96 transitions. [2022-12-05 22:08:52,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 100 transitions, 616 flow [2022-12-05 22:08:52,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 100 transitions, 616 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 22:08:52,018 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 300 flow [2022-12-05 22:08:52,018 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=300, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2022-12-05 22:08:52,018 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 25 predicate places. [2022-12-05 22:08:52,019 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 300 flow [2022-12-05 22:08:52,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:08:52,019 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:52,019 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:52,029 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 22:08:52,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:52,224 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1372689404, now seen corresponding path program 3 times [2022-12-05 22:08:52,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:52,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393472147] [2022-12-05 22:08:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:52,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 22:08:52,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:52,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393472147] [2022-12-05 22:08:52,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393472147] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:52,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787522077] [2022-12-05 22:08:52,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:08:52,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:52,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:52,345 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 22:08:52,347 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 22:08:52,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 22:08:52,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:52,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 22:08:52,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 22:08:52,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 22:08:52,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787522077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:52,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:52,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-05 22:08:52,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075959226] [2022-12-05 22:08:52,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:52,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 22:08:52,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:52,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 22:08:52,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-05 22:08:52,622 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2022-12-05 22:08:52,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 300 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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 22:08:52,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:52,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2022-12-05 22:08:52,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:52,929 INFO L130 PetriNetUnfolder]: 1173/1665 cut-off events. [2022-12-05 22:08:52,929 INFO L131 PetriNetUnfolder]: For 3825/4057 co-relation queries the response was YES. [2022-12-05 22:08:52,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6640 conditions, 1665 events. 1173/1665 cut-off events. For 3825/4057 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6280 event pairs, 123 based on Foata normal form. 258/1922 useless extension candidates. Maximal degree in co-relation 6607. Up to 443 conditions per place. [2022-12-05 22:08:52,939 INFO L137 encePairwiseOnDemand]: 23/29 looper letters, 99 selfloop transitions, 20 changer transitions 9/129 dead transitions. [2022-12-05 22:08:52,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 129 transitions, 931 flow [2022-12-05 22:08:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 22:08:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 22:08:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2022-12-05 22:08:52,940 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.42911877394636017 [2022-12-05 22:08:52,940 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 300 flow. Second operand 9 states and 112 transitions. [2022-12-05 22:08:52,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 129 transitions, 931 flow [2022-12-05 22:08:52,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 129 transitions, 923 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-05 22:08:52,947 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 454 flow [2022-12-05 22:08:52,947 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=454, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2022-12-05 22:08:52,947 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 36 predicate places. [2022-12-05 22:08:52,947 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 454 flow [2022-12-05 22:08:52,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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 22:08:52,948 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:52,948 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:52,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-05 22:08:53,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:53,154 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:53,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:53,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1680357346, now seen corresponding path program 4 times [2022-12-05 22:08:53,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:53,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932474649] [2022-12-05 22:08:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:53,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:53,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:53,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932474649] [2022-12-05 22:08:53,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932474649] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:53,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329932174] [2022-12-05 22:08:53,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 22:08:53,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:53,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:53,280 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 22:08:53,282 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 22:08:53,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 22:08:53,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:53,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 22:08:53,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:53,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:53,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329932174] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:53,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:53,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-05 22:08:53,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463908961] [2022-12-05 22:08:53,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:53,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 22:08:53,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:53,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 22:08:53,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-05 22:08:53,533 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2022-12-05 22:08:53,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 454 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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 22:08:53,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:53,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2022-12-05 22:08:53,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:53,741 INFO L130 PetriNetUnfolder]: 1386/1974 cut-off events. [2022-12-05 22:08:53,741 INFO L131 PetriNetUnfolder]: For 6577/6857 co-relation queries the response was YES. [2022-12-05 22:08:53,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8673 conditions, 1974 events. 1386/1974 cut-off events. For 6577/6857 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7695 event pairs, 201 based on Foata normal form. 306/2279 useless extension candidates. Maximal degree in co-relation 8636. Up to 730 conditions per place. [2022-12-05 22:08:53,757 INFO L137 encePairwiseOnDemand]: 23/29 looper letters, 77 selfloop transitions, 24 changer transitions 9/111 dead transitions. [2022-12-05 22:08:53,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 111 transitions, 918 flow [2022-12-05 22:08:53,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 22:08:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 22:08:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2022-12-05 22:08:53,759 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4433497536945813 [2022-12-05 22:08:53,759 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 454 flow. Second operand 7 states and 90 transitions. [2022-12-05 22:08:53,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 111 transitions, 918 flow [2022-12-05 22:08:53,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 111 transitions, 887 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-12-05 22:08:53,776 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 575 flow [2022-12-05 22:08:53,776 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=575, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2022-12-05 22:08:53,776 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 42 predicate places. [2022-12-05 22:08:53,777 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 575 flow [2022-12-05 22:08:53,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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 22:08:53,777 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:53,777 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:53,795 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 22:08:53,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:53,983 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:53,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:53,984 INFO L85 PathProgramCache]: Analyzing trace with hash -227216009, now seen corresponding path program 5 times [2022-12-05 22:08:53,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:53,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820022530] [2022-12-05 22:08:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:53,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:54,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:54,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820022530] [2022-12-05 22:08:54,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820022530] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:54,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659830842] [2022-12-05 22:08:54,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 22:08:54,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:54,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:54,083 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 22:08:54,103 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 22:08:54,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:08:54,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:54,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 22:08:54,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:54,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:54,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659830842] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:54,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:54,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-05 22:08:54,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565534986] [2022-12-05 22:08:54,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:54,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 22:08:54,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:54,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 22:08:54,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-05 22:08:54,336 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-05 22:08:54,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 575 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 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 22:08:54,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:54,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-05 22:08:54,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:54,690 INFO L130 PetriNetUnfolder]: 1735/2534 cut-off events. [2022-12-05 22:08:54,690 INFO L131 PetriNetUnfolder]: For 11929/12459 co-relation queries the response was YES. [2022-12-05 22:08:54,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11493 conditions, 2534 events. 1735/2534 cut-off events. For 11929/12459 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11129 event pairs, 574 based on Foata normal form. 536/3044 useless extension candidates. Maximal degree in co-relation 8324. Up to 1281 conditions per place. [2022-12-05 22:08:54,705 INFO L137 encePairwiseOnDemand]: 20/29 looper letters, 65 selfloop transitions, 7 changer transitions 60/137 dead transitions. [2022-12-05 22:08:54,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 137 transitions, 1335 flow [2022-12-05 22:08:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 22:08:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 22:08:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2022-12-05 22:08:54,706 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2022-12-05 22:08:54,706 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 575 flow. Second operand 9 states and 99 transitions. [2022-12-05 22:08:54,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 137 transitions, 1335 flow [2022-12-05 22:08:54,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 137 transitions, 1285 flow, removed 10 selfloop flow, removed 3 redundant places. [2022-12-05 22:08:54,733 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 592 flow [2022-12-05 22:08:54,735 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=592, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2022-12-05 22:08:54,736 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 51 predicate places. [2022-12-05 22:08:54,736 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 592 flow [2022-12-05 22:08:54,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 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 22:08:54,736 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:54,736 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:54,744 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 22:08:54,942 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,SelfDestructingSolverStorable11 [2022-12-05 22:08:54,943 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:54,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:54,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1996113858, now seen corresponding path program 6 times [2022-12-05 22:08:54,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:54,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697460222] [2022-12-05 22:08:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:54,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-05 22:08:55,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:55,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697460222] [2022-12-05 22:08:55,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697460222] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:55,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941134390] [2022-12-05 22:08:55,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 22:08:55,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:55,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:55,038 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 22:08:55,040 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 22:08:55,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 22:08:55,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:55,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 22:08:55,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-05 22:08:55,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-05 22:08:55,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941134390] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:55,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:55,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-05 22:08:55,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081545312] [2022-12-05 22:08:55,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:55,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 22:08:55,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 22:08:55,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-12-05 22:08:55,399 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2022-12-05 22:08:55,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 592 flow. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 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 22:08:55,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:55,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2022-12-05 22:08:55,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:55,861 INFO L130 PetriNetUnfolder]: 1966/2771 cut-off events. [2022-12-05 22:08:55,861 INFO L131 PetriNetUnfolder]: For 14700/14914 co-relation queries the response was YES. [2022-12-05 22:08:55,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13030 conditions, 2771 events. 1966/2771 cut-off events. For 14700/14914 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11546 event pairs, 495 based on Foata normal form. 331/3075 useless extension candidates. Maximal degree in co-relation 12976. Up to 1280 conditions per place. [2022-12-05 22:08:55,875 INFO L137 encePairwiseOnDemand]: 21/29 looper letters, 158 selfloop transitions, 14 changer transitions 21/197 dead transitions. [2022-12-05 22:08:55,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 197 transitions, 2288 flow [2022-12-05 22:08:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 22:08:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 22:08:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 100 transitions. [2022-12-05 22:08:55,877 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.31347962382445144 [2022-12-05 22:08:55,877 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 592 flow. Second operand 11 states and 100 transitions. [2022-12-05 22:08:55,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 197 transitions, 2288 flow [2022-12-05 22:08:55,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 197 transitions, 2226 flow, removed 29 selfloop flow, removed 4 redundant places. [2022-12-05 22:08:55,894 INFO L231 Difference]: Finished difference. Result has 88 places, 70 transitions, 640 flow [2022-12-05 22:08:55,894 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=640, PETRI_PLACES=88, PETRI_TRANSITIONS=70} [2022-12-05 22:08:55,895 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 55 predicate places. [2022-12-05 22:08:55,895 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 70 transitions, 640 flow [2022-12-05 22:08:55,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 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 22:08:55,895 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:55,895 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:55,903 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 22:08:56,102 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,SelfDestructingSolverStorable12 [2022-12-05 22:08:56,102 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:56,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:56,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1837872689, now seen corresponding path program 7 times [2022-12-05 22:08:56,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:56,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104051837] [2022-12-05 22:08:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:56,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-05 22:08:56,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:56,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104051837] [2022-12-05 22:08:56,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104051837] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:56,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821001032] [2022-12-05 22:08:56,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 22:08:56,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:56,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:56,236 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 22:08:56,239 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 22:08:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:56,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 22:08:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-05 22:08:56,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-05 22:08:56,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821001032] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:56,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:56,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-12-05 22:08:56,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343068635] [2022-12-05 22:08:56,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:56,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 22:08:56,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:56,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 22:08:56,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-05 22:08:56,465 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-05 22:08:56,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 70 transitions, 640 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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 22:08:56,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:56,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-05 22:08:56,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:56,812 INFO L130 PetriNetUnfolder]: 2153/3041 cut-off events. [2022-12-05 22:08:56,812 INFO L131 PetriNetUnfolder]: For 14587/14850 co-relation queries the response was YES. [2022-12-05 22:08:56,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15264 conditions, 3041 events. 2153/3041 cut-off events. For 14587/14850 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11989 event pairs, 359 based on Foata normal form. 297/3337 useless extension candidates. Maximal degree in co-relation 15209. Up to 1403 conditions per place. [2022-12-05 22:08:56,827 INFO L137 encePairwiseOnDemand]: 20/29 looper letters, 109 selfloop transitions, 14 changer transitions 0/128 dead transitions. [2022-12-05 22:08:56,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 128 transitions, 1295 flow [2022-12-05 22:08:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 22:08:56,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 22:08:56,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2022-12-05 22:08:56,828 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2022-12-05 22:08:56,828 INFO L175 Difference]: Start difference. First operand has 88 places, 70 transitions, 640 flow. Second operand 9 states and 87 transitions. [2022-12-05 22:08:56,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 128 transitions, 1295 flow [2022-12-05 22:08:56,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 128 transitions, 1246 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-12-05 22:08:56,850 INFO L231 Difference]: Finished difference. Result has 94 places, 73 transitions, 696 flow [2022-12-05 22:08:56,850 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=696, PETRI_PLACES=94, PETRI_TRANSITIONS=73} [2022-12-05 22:08:56,850 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 61 predicate places. [2022-12-05 22:08:56,851 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 73 transitions, 696 flow [2022-12-05 22:08:56,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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 22:08:56,851 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:56,851 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:56,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:57,055 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,SelfDestructingSolverStorable13 [2022-12-05 22:08:57,056 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:57,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:57,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1640611919, now seen corresponding path program 8 times [2022-12-05 22:08:57,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:57,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24717510] [2022-12-05 22:08:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:57,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-05 22:08:57,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:57,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24717510] [2022-12-05 22:08:57,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24717510] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:57,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803638784] [2022-12-05 22:08:57,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:08:57,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:57,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:57,194 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:08:57,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-05 22:08:57,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:08:57,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:57,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 22:08:57,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-05 22:08:57,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-05 22:08:57,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803638784] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:57,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:57,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-05 22:08:57,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241585933] [2022-12-05 22:08:57,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:57,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-05 22:08:57,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:57,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-05 22:08:57,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-05 22:08:57,374 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2022-12-05 22:08:57,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 73 transitions, 696 flow. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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 22:08:57,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:57,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2022-12-05 22:08:57,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:57,942 INFO L130 PetriNetUnfolder]: 2749/3883 cut-off events. [2022-12-05 22:08:57,942 INFO L131 PetriNetUnfolder]: For 18300/18596 co-relation queries the response was YES. [2022-12-05 22:08:57,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19793 conditions, 3883 events. 2749/3883 cut-off events. For 18300/18596 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 15962 event pairs, 304 based on Foata normal form. 330/4212 useless extension candidates. Maximal degree in co-relation 19734. Up to 1287 conditions per place. [2022-12-05 22:08:57,961 INFO L137 encePairwiseOnDemand]: 22/29 looper letters, 143 selfloop transitions, 37 changer transitions 55/237 dead transitions. [2022-12-05 22:08:57,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 237 transitions, 2142 flow [2022-12-05 22:08:57,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 22:08:57,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 22:08:57,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 164 transitions. [2022-12-05 22:08:57,962 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4350132625994695 [2022-12-05 22:08:57,962 INFO L175 Difference]: Start difference. First operand has 94 places, 73 transitions, 696 flow. Second operand 13 states and 164 transitions. [2022-12-05 22:08:57,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 237 transitions, 2142 flow [2022-12-05 22:08:57,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 237 transitions, 2128 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-05 22:08:57,995 INFO L231 Difference]: Finished difference. Result has 105 places, 83 transitions, 929 flow [2022-12-05 22:08:57,995 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=929, PETRI_PLACES=105, PETRI_TRANSITIONS=83} [2022-12-05 22:08:57,996 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 72 predicate places. [2022-12-05 22:08:57,996 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 83 transitions, 929 flow [2022-12-05 22:08:57,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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 22:08:57,996 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:57,996 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:58,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:58,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-05 22:08:58,201 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:58,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1206619896, now seen corresponding path program 9 times [2022-12-05 22:08:58,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:58,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89193651] [2022-12-05 22:08:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:58,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-05 22:08:58,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:58,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89193651] [2022-12-05 22:08:58,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89193651] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:58,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37515527] [2022-12-05 22:08:58,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:08:58,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:58,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:58,368 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:08:58,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-05 22:08:58,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 22:08:58,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:58,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 22:08:58,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-05 22:08:58,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-05 22:08:58,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37515527] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:58,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:58,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-05 22:08:58,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718949487] [2022-12-05 22:08:58,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:58,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 22:08:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:58,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 22:08:58,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-12-05 22:08:58,703 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-05 22:08:58,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 83 transitions, 929 flow. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 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 22:08:58,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:58,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-05 22:08:58,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:59,446 INFO L130 PetriNetUnfolder]: 3738/5364 cut-off events. [2022-12-05 22:08:59,446 INFO L131 PetriNetUnfolder]: For 34546/35202 co-relation queries the response was YES. [2022-12-05 22:08:59,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28522 conditions, 5364 events. 3738/5364 cut-off events. For 34546/35202 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 24939 event pairs, 1160 based on Foata normal form. 668/5971 useless extension candidates. Maximal degree in co-relation 20930. Up to 2389 conditions per place. [2022-12-05 22:08:59,480 INFO L137 encePairwiseOnDemand]: 20/29 looper letters, 85 selfloop transitions, 11 changer transitions 108/211 dead transitions. [2022-12-05 22:08:59,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 211 transitions, 2436 flow [2022-12-05 22:08:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 22:08:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 22:08:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 133 transitions. [2022-12-05 22:08:59,482 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.35278514588859416 [2022-12-05 22:08:59,482 INFO L175 Difference]: Start difference. First operand has 105 places, 83 transitions, 929 flow. Second operand 13 states and 133 transitions. [2022-12-05 22:08:59,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 211 transitions, 2436 flow [2022-12-05 22:08:59,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 211 transitions, 2347 flow, removed 26 selfloop flow, removed 4 redundant places. [2022-12-05 22:08:59,538 INFO L231 Difference]: Finished difference. Result has 118 places, 85 transitions, 961 flow [2022-12-05 22:08:59,539 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=961, PETRI_PLACES=118, PETRI_TRANSITIONS=85} [2022-12-05 22:08:59,540 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 85 predicate places. [2022-12-05 22:08:59,540 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 85 transitions, 961 flow [2022-12-05 22:08:59,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 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 22:08:59,540 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:59,540 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:59,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:59,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-05 22:08:59,747 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:08:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:59,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1679097179, now seen corresponding path program 10 times [2022-12-05 22:08:59,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:59,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856843483] [2022-12-05 22:08:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:59,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-05 22:08:59,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:59,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856843483] [2022-12-05 22:08:59,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856843483] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:59,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073379729] [2022-12-05 22:08:59,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 22:08:59,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:59,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:59,918 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:08:59,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-05 22:09:00,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 22:09:00,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:09:00,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 22:09:00,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:09:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-05 22:09:00,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:09:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-05 22:09:00,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073379729] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:09:00,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:09:00,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-05 22:09:00,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472863777] [2022-12-05 22:09:00,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:09:00,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 22:09:00,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:09:00,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 22:09:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-12-05 22:09:00,161 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2022-12-05 22:09:00,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 85 transitions, 961 flow. Second operand has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 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 22:09:00,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:09:00,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2022-12-05 22:09:00,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:09:01,331 INFO L130 PetriNetUnfolder]: 5063/7080 cut-off events. [2022-12-05 22:09:01,331 INFO L131 PetriNetUnfolder]: For 53203/53760 co-relation queries the response was YES. [2022-12-05 22:09:01,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39286 conditions, 7080 events. 5063/7080 cut-off events. For 53203/53760 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 32893 event pairs, 709 based on Foata normal form. 852/7875 useless extension candidates. Maximal degree in co-relation 39209. Up to 2027 conditions per place. [2022-12-05 22:09:01,368 INFO L137 encePairwiseOnDemand]: 20/29 looper letters, 404 selfloop transitions, 35 changer transitions 55/499 dead transitions. [2022-12-05 22:09:01,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 499 transitions, 7123 flow [2022-12-05 22:09:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-05 22:09:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-05 22:09:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 181 transitions. [2022-12-05 22:09:01,370 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.32849364791288566 [2022-12-05 22:09:01,370 INFO L175 Difference]: Start difference. First operand has 118 places, 85 transitions, 961 flow. Second operand 19 states and 181 transitions. [2022-12-05 22:09:01,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 499 transitions, 7123 flow [2022-12-05 22:09:01,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 499 transitions, 6890 flow, removed 107 selfloop flow, removed 7 redundant places. [2022-12-05 22:09:01,470 INFO L231 Difference]: Finished difference. Result has 125 places, 105 transitions, 1230 flow [2022-12-05 22:09:01,470 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1230, PETRI_PLACES=125, PETRI_TRANSITIONS=105} [2022-12-05 22:09:01,470 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 92 predicate places. [2022-12-05 22:09:01,470 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 105 transitions, 1230 flow [2022-12-05 22:09:01,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 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 22:09:01,471 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:09:01,471 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:09:01,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-05 22:09:01,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-05 22:09:01,675 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:09:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:09:01,676 INFO L85 PathProgramCache]: Analyzing trace with hash 255996746, now seen corresponding path program 11 times [2022-12-05 22:09:01,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:09:01,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541409989] [2022-12-05 22:09:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:09:01,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:09:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:09:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-05 22:09:01,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:09:01,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541409989] [2022-12-05 22:09:01,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541409989] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:09:01,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858523247] [2022-12-05 22:09:01,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 22:09:01,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:09:01,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:09:01,814 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:09:01,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-05 22:09:01,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-05 22:09:01,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:09:01,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 22:09:01,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:09:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-05 22:09:02,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:09:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-05 22:09:02,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858523247] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:09:02,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:09:02,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-05 22:09:02,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457832940] [2022-12-05 22:09:02,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:09:02,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 22:09:02,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:09:02,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 22:09:02,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-12-05 22:09:02,080 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2022-12-05 22:09:02,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 105 transitions, 1230 flow. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 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 22:09:02,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:09:02,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2022-12-05 22:09:02,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:09:04,549 INFO L130 PetriNetUnfolder]: 12207/17187 cut-off events. [2022-12-05 22:09:04,549 INFO L131 PetriNetUnfolder]: For 128481/128560 co-relation queries the response was YES. [2022-12-05 22:09:04,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102368 conditions, 17187 events. 12207/17187 cut-off events. For 128481/128560 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 84407 event pairs, 833 based on Foata normal form. 414/17591 useless extension candidates. Maximal degree in co-relation 102293. Up to 4877 conditions per place. [2022-12-05 22:09:04,648 INFO L137 encePairwiseOnDemand]: 17/29 looper letters, 541 selfloop transitions, 100 changer transitions 0/653 dead transitions. [2022-12-05 22:09:04,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 653 transitions, 8098 flow [2022-12-05 22:09:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-05 22:09:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-05 22:09:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 356 transitions. [2022-12-05 22:09:04,650 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4091954022988506 [2022-12-05 22:09:04,650 INFO L175 Difference]: Start difference. First operand has 125 places, 105 transitions, 1230 flow. Second operand 30 states and 356 transitions. [2022-12-05 22:09:04,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 653 transitions, 8098 flow [2022-12-05 22:09:04,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 653 transitions, 7666 flow, removed 98 selfloop flow, removed 11 redundant places. [2022-12-05 22:09:05,002 INFO L231 Difference]: Finished difference. Result has 163 places, 213 transitions, 2895 flow [2022-12-05 22:09:05,003 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2895, PETRI_PLACES=163, PETRI_TRANSITIONS=213} [2022-12-05 22:09:05,003 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 130 predicate places. [2022-12-05 22:09:05,003 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 213 transitions, 2895 flow [2022-12-05 22:09:05,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 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 22:09:05,003 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:09:05,004 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:09:05,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-05 22:09:05,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:09:05,204 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:09:05,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:09:05,205 INFO L85 PathProgramCache]: Analyzing trace with hash 302318024, now seen corresponding path program 12 times [2022-12-05 22:09:05,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:09:05,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793001394] [2022-12-05 22:09:05,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:09:05,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:09:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:09:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-05 22:09:05,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:09:05,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793001394] [2022-12-05 22:09:05,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793001394] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:09:05,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880784826] [2022-12-05 22:09:05,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 22:09:05,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:09:05,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:09:05,448 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:09:05,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-05 22:09:05,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-05 22:09:05,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:09:05,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 22:09:05,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:09:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-05 22:09:05,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:09:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-05 22:09:05,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880784826] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:09:05,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:09:05,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-05 22:09:05,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946689147] [2022-12-05 22:09:05,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:09:05,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 22:09:05,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:09:05,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 22:09:05,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-05 22:09:05,743 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2022-12-05 22:09:05,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 213 transitions, 2895 flow. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:09:05,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:09:05,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2022-12-05 22:09:05,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:09:09,072 INFO L130 PetriNetUnfolder]: 16505/23253 cut-off events. [2022-12-05 22:09:09,073 INFO L131 PetriNetUnfolder]: For 283954/284477 co-relation queries the response was YES. [2022-12-05 22:09:09,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153666 conditions, 23253 events. 16505/23253 cut-off events. For 283954/284477 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 122335 event pairs, 1790 based on Foata normal form. 684/23917 useless extension candidates. Maximal degree in co-relation 153571. Up to 7469 conditions per place. [2022-12-05 22:09:09,259 INFO L137 encePairwiseOnDemand]: 22/29 looper letters, 537 selfloop transitions, 79 changer transitions 333/953 dead transitions. [2022-12-05 22:09:09,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 953 transitions, 12774 flow [2022-12-05 22:09:09,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-05 22:09:09,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-05 22:09:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 268 transitions. [2022-12-05 22:09:09,261 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4400656814449918 [2022-12-05 22:09:09,261 INFO L175 Difference]: Start difference. First operand has 163 places, 213 transitions, 2895 flow. Second operand 21 states and 268 transitions. [2022-12-05 22:09:09,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 953 transitions, 12774 flow [2022-12-05 22:09:10,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 953 transitions, 11793 flow, removed 472 selfloop flow, removed 7 redundant places. [2022-12-05 22:09:10,250 INFO L231 Difference]: Finished difference. Result has 182 places, 242 transitions, 3287 flow [2022-12-05 22:09:10,250 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3287, PETRI_PLACES=182, PETRI_TRANSITIONS=242} [2022-12-05 22:09:10,250 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 149 predicate places. [2022-12-05 22:09:10,250 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 242 transitions, 3287 flow [2022-12-05 22:09:10,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:09:10,251 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:09:10,251 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:09:10,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-05 22:09:10,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:09:10,452 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:09:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:09:10,452 INFO L85 PathProgramCache]: Analyzing trace with hash -417422147, now seen corresponding path program 13 times [2022-12-05 22:09:10,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:09:10,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82861864] [2022-12-05 22:09:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:09:10,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:09:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:09:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-05 22:09:10,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:09:10,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82861864] [2022-12-05 22:09:10,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82861864] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:09:10,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288636824] [2022-12-05 22:09:10,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 22:09:10,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:09:10,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:09:10,624 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:09:10,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-05 22:09:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:09:10,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 22:09:10,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:09:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-05 22:09:10,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:09:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-05 22:09:10,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288636824] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:09:10,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:09:10,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-12-05 22:09:10,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896702501] [2022-12-05 22:09:10,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:09:10,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-05 22:09:10,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:09:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-05 22:09:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2022-12-05 22:09:10,970 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-05 22:09:10,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 242 transitions, 3287 flow. Second operand has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 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 22:09:10,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:09:10,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-05 22:09:10,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:09:15,730 INFO L130 PetriNetUnfolder]: 23466/33332 cut-off events. [2022-12-05 22:09:15,730 INFO L131 PetriNetUnfolder]: For 467492/469179 co-relation queries the response was YES. [2022-12-05 22:09:15,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225760 conditions, 33332 events. 23466/33332 cut-off events. For 467492/469179 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 191597 event pairs, 6188 based on Foata normal form. 1833/34921 useless extension candidates. Maximal degree in co-relation 219065. Up to 13730 conditions per place. [2022-12-05 22:09:16,039 INFO L137 encePairwiseOnDemand]: 20/29 looper letters, 264 selfloop transitions, 17 changer transitions 366/657 dead transitions. [2022-12-05 22:09:16,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 657 transitions, 9769 flow [2022-12-05 22:09:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-05 22:09:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-05 22:09:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 169 transitions. [2022-12-05 22:09:16,040 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.34279918864097364 [2022-12-05 22:09:16,040 INFO L175 Difference]: Start difference. First operand has 182 places, 242 transitions, 3287 flow. Second operand 17 states and 169 transitions. [2022-12-05 22:09:16,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 657 transitions, 9769 flow [2022-12-05 22:09:18,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 657 transitions, 9516 flow, removed 44 selfloop flow, removed 8 redundant places. [2022-12-05 22:09:18,193 INFO L231 Difference]: Finished difference. Result has 196 places, 244 transitions, 3302 flow [2022-12-05 22:09:18,193 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3178, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3302, PETRI_PLACES=196, PETRI_TRANSITIONS=244} [2022-12-05 22:09:18,193 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 163 predicate places. [2022-12-05 22:09:18,194 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 244 transitions, 3302 flow [2022-12-05 22:09:18,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 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 22:09:18,194 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:09:18,194 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:09:18,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-05 22:09:18,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:09:18,394 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:09:18,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:09:18,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2052510304, now seen corresponding path program 14 times [2022-12-05 22:09:18,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:09:18,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250791247] [2022-12-05 22:09:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:09:18,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:09:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:09:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-05 22:09:18,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:09:18,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250791247] [2022-12-05 22:09:18,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250791247] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:09:18,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582167131] [2022-12-05 22:09:18,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:09:18,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:09:18,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:09:18,566 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:09:18,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-05 22:09:18,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:09:18,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:09:18,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 22:09:18,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:09:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-05 22:09:18,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:09:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-05 22:09:18,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582167131] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:09:18,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:09:18,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-12-05 22:09:18,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062486126] [2022-12-05 22:09:18,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:09:18,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-05 22:09:18,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:09:18,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-05 22:09:18,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2022-12-05 22:09:18,934 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-05 22:09:18,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 244 transitions, 3302 flow. Second operand has 25 states, 25 states have (on average 4.32) internal successors, (108), 25 states have internal predecessors, (108), 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 22:09:18,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:09:18,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-05 22:09:18,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:09:22,779 INFO L130 PetriNetUnfolder]: 18835/26484 cut-off events. [2022-12-05 22:09:22,779 INFO L131 PetriNetUnfolder]: For 392942/393533 co-relation queries the response was YES. [2022-12-05 22:09:22,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178550 conditions, 26484 events. 18835/26484 cut-off events. For 392942/393533 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 143363 event pairs, 5072 based on Foata normal form. 1342/27707 useless extension candidates. Maximal degree in co-relation 178432. Up to 15266 conditions per place. [2022-12-05 22:09:23,152 INFO L137 encePairwiseOnDemand]: 22/29 looper letters, 486 selfloop transitions, 73 changer transitions 0/577 dead transitions. [2022-12-05 22:09:23,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 577 transitions, 9518 flow [2022-12-05 22:09:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 22:09:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 22:09:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 115 transitions. [2022-12-05 22:09:23,153 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2832512315270936 [2022-12-05 22:09:23,153 INFO L175 Difference]: Start difference. First operand has 196 places, 244 transitions, 3302 flow. Second operand 14 states and 115 transitions. [2022-12-05 22:09:23,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 577 transitions, 9518 flow [2022-12-05 22:09:24,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 577 transitions, 9258 flow, removed 118 selfloop flow, removed 9 redundant places. [2022-12-05 22:09:24,690 INFO L231 Difference]: Finished difference. Result has 191 places, 280 transitions, 3923 flow [2022-12-05 22:09:24,690 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3203, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3923, PETRI_PLACES=191, PETRI_TRANSITIONS=280} [2022-12-05 22:09:24,690 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 158 predicate places. [2022-12-05 22:09:24,690 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 280 transitions, 3923 flow [2022-12-05 22:09:24,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.32) internal successors, (108), 25 states have internal predecessors, (108), 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 22:09:24,691 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:09:24,691 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:09:24,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-05 22:09:24,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:09:24,891 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 22:09:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:09:24,892 INFO L85 PathProgramCache]: Analyzing trace with hash 220034347, now seen corresponding path program 15 times [2022-12-05 22:09:24,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:09:24,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319298621] [2022-12-05 22:09:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:09:24,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:09:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:09:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-05 22:09:25,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:09:25,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319298621] [2022-12-05 22:09:25,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319298621] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:09:25,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134739647] [2022-12-05 22:09:25,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:09:25,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:09:25,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:09:25,058 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:09:25,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-05 22:09:25,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 22:09:25,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:09:25,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-05 22:09:25,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:09:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-05 22:09:25,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:09:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-05 22:09:25,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134739647] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:09:25,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:09:25,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 14 [2022-12-05 22:09:25,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121399087] [2022-12-05 22:09:25,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:09:25,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 22:09:25,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:09:25,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 22:09:25,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-12-05 22:09:25,367 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2022-12-05 22:09:25,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 280 transitions, 3923 flow. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 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 22:09:25,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:09:25,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2022-12-05 22:09:25,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:09:29,055 INFO L130 PetriNetUnfolder]: 18385/25797 cut-off events. [2022-12-05 22:09:29,055 INFO L131 PetriNetUnfolder]: For 345208/345763 co-relation queries the response was YES. [2022-12-05 22:09:29,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177792 conditions, 25797 events. 18385/25797 cut-off events. For 345208/345763 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 136404 event pairs, 1309 based on Foata normal form. 614/26389 useless extension candidates. Maximal degree in co-relation 177680. Up to 7597 conditions per place. [2022-12-05 22:09:29,245 INFO L137 encePairwiseOnDemand]: 17/29 looper letters, 0 selfloop transitions, 0 changer transitions 669/669 dead transitions. [2022-12-05 22:09:29,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 669 transitions, 10117 flow [2022-12-05 22:09:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-05 22:09:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-05 22:09:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 179 transitions. [2022-12-05 22:09:29,246 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2683658170914543 [2022-12-05 22:09:29,247 INFO L175 Difference]: Start difference. First operand has 191 places, 280 transitions, 3923 flow. Second operand 23 states and 179 transitions. [2022-12-05 22:09:29,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 669 transitions, 10117 flow [2022-12-05 22:09:30,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 669 transitions, 9142 flow, removed 220 selfloop flow, removed 18 redundant places. [2022-12-05 22:09:30,736 INFO L231 Difference]: Finished difference. Result has 192 places, 0 transitions, 0 flow [2022-12-05 22:09:30,736 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3437, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=0, PETRI_PLACES=192, PETRI_TRANSITIONS=0} [2022-12-05 22:09:30,736 INFO L294 CegarLoopForPetriNet]: 33 programPoint places, 159 predicate places. [2022-12-05 22:09:30,736 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 0 transitions, 0 flow [2022-12-05 22:09:30,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 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 22:09:30,738 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-12-05 22:09:30,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-12-05 22:09:30,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-12-05 22:09:30,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-12-05 22:09:30,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-05 22:09:30,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:09:30,939 INFO L458 BasicCegarLoop]: Path program histogram: [15, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:09:30,942 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 22:09:30,942 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 22:09:30,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 10:09:30 BasicIcfg [2022-12-05 22:09:30,944 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 22:09:30,944 INFO L158 Benchmark]: Toolchain (without parser) took 49785.63ms. Allocated memory was 194.0MB in the beginning and 5.1GB in the end (delta: 4.9GB). Free memory was 169.0MB in the beginning and 3.2GB in the end (delta: -3.0GB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2022-12-05 22:09:30,944 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 127.9MB. Free memory was 107.4MB in the beginning and 107.3MB in the end (delta: 45.2kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 22:09:30,944 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.70ms. Allocated memory is still 194.0MB. Free memory was 169.0MB in the beginning and 156.4MB in the end (delta: 12.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-05 22:09:30,944 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.20ms. Allocated memory is still 194.0MB. Free memory was 156.4MB in the beginning and 154.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 22:09:30,944 INFO L158 Benchmark]: Boogie Preprocessor took 36.23ms. Allocated memory is still 194.0MB. Free memory was 154.4MB in the beginning and 152.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 22:09:30,945 INFO L158 Benchmark]: RCFGBuilder took 425.75ms. Allocated memory is still 194.0MB. Free memory was 152.6MB in the beginning and 169.2MB in the end (delta: -16.6MB). Peak memory consumption was 20.8MB. Max. memory is 8.0GB. [2022-12-05 22:09:30,945 INFO L158 Benchmark]: TraceAbstraction took 49027.58ms. Allocated memory was 194.0MB in the beginning and 5.1GB in the end (delta: 4.9GB). Free memory was 168.7MB in the beginning and 3.2GB in the end (delta: -3.0GB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2022-12-05 22:09:30,946 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 127.9MB. Free memory was 107.4MB in the beginning and 107.3MB in the end (delta: 45.2kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 249.70ms. Allocated memory is still 194.0MB. Free memory was 169.0MB in the beginning and 156.4MB in the end (delta: 12.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 42.20ms. Allocated memory is still 194.0MB. Free memory was 156.4MB in the beginning and 154.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.23ms. Allocated memory is still 194.0MB. Free memory was 154.4MB in the beginning and 152.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 425.75ms. Allocated memory is still 194.0MB. Free memory was 152.6MB in the beginning and 169.2MB in the end (delta: -16.6MB). Peak memory consumption was 20.8MB. Max. memory is 8.0GB. * TraceAbstraction took 49027.58ms. Allocated memory was 194.0MB in the beginning and 5.1GB in the end (delta: 4.9GB). Free memory was 168.7MB in the beginning and 3.2GB in the end (delta: -3.0GB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.1s, 152 PlacesBefore, 33 PlacesAfterwards, 158 TransitionsBefore, 29 TransitionsAfterwards, 1720 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 86 TrivialYvCompositions, 33 ConcurrentYvCompositions, 10 ChoiceCompositions, 129 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 927, independent: 907, independent conditional: 907, independent unconditional: 0, dependent: 20, dependent conditional: 20, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 927, independent: 907, independent conditional: 0, independent unconditional: 907, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 927, independent: 907, independent conditional: 0, independent unconditional: 907, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 927, independent: 907, independent conditional: 0, independent unconditional: 907, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 889, independent: 876, independent conditional: 0, independent unconditional: 876, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 889, independent: 876, independent conditional: 0, independent unconditional: 876, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 13, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 13, dependent conditional: 0, dependent unconditional: 13, 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: 927, independent: 31, independent conditional: 0, independent unconditional: 31, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 889, unknown conditional: 0, unknown unconditional: 889] , Statistics on independence cache: Total cache size (in pairs): 1385, Positive cache size: 1372, Positive conditional cache size: 0, Positive unconditional cache size: 1372, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - PositiveResult [Line: 103]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 191 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 48.9s, OverallIterations: 22, TraceHistogramMax: 4, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 32.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2760 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2760 mSDsluCounter, 167 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 115 mSDsCounter, 263 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6895 IncrementalHoareTripleChecker+Invalid, 7158 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 263 mSolverCounterUnsat, 52 mSDtfsCounter, 6895 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1522 GetRequests, 1106 SyntacticMatches, 45 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3923occurred in iteration=21, InterpolantAutomatonStates: 242, 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: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 1304 NumberOfCodeBlocks, 1266 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 1851 ConstructedInterpolants, 0 QuantifiedInterpolants, 5497 SizeOfPredicates, 64 NumberOfNonLiveVariables, 4868 ConjunctsInSsa, 141 ConjunctsInUnsatCore, 58 InterpolantComputations, 8 PerfectInterpolantSequences, 822/1033 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-05 22:09:30,963 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...