/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/bench-exp3x3-opt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 20:49:52,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 20:49:52,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 20:49:52,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 20:49:52,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 20:49:52,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 20:49:52,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 20:49:52,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 20:49:52,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 20:49:52,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 20:49:52,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 20:49:52,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 20:49:52,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 20:49:52,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 20:49:52,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 20:49:52,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 20:49:52,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 20:49:52,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 20:49:52,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 20:49:52,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 20:49:52,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 20:49:52,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 20:49:52,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 20:49:52,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 20:49:52,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 20:49:52,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 20:49:52,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 20:49:52,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 20:49:52,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 20:49:52,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 20:49:52,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 20:49:52,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 20:49:52,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 20:49:52,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 20:49:52,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 20:49:52,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 20:49:52,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 20:49:52,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 20:49:52,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 20:49:52,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 20:49:52,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 20:49:52,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-05 20:49:52,578 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 20:49:52,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 20:49:52,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 20:49:52,580 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 20:49:52,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 20:49:52,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 20:49:52,581 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 20:49:52,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 20:49:52,581 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 20:49:52,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 20:49:52,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 20:49:52,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 20:49:52,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 20:49:52,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 20:49:52,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 20:49:52,582 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 20:49:52,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 20:49:52,583 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 20:49:52,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 20:49:52,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 20:49:52,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 20:49:52,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 20:49:52,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 20:49:52,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 20:49:52,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 20:49:52,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 20:49:52,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 20:49:52,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 20:49:52,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 20:49:52,584 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 20:49:52,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 20:49:52,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 20:49:52,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 20:49:52,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 20:49:52,884 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 20:49:52,884 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 20:49:52,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp3x3-opt.wvr.c [2022-12-05 20:49:53,801 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 20:49:53,988 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 20:49:53,988 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp3x3-opt.wvr.c [2022-12-05 20:49:53,993 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e94d37af8/d13c418470ff402ba2f312138651b7dc/FLAG19ad77c85 [2022-12-05 20:49:54,002 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e94d37af8/d13c418470ff402ba2f312138651b7dc [2022-12-05 20:49:54,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 20:49:54,013 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 20:49:54,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 20:49:54,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 20:49:54,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 20:49:54,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 08:49:54" (1/1) ... [2022-12-05 20:49:54,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b94d234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:49:54, skipping insertion in model container [2022-12-05 20:49:54,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 08:49:54" (1/1) ... [2022-12-05 20:49:54,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 20:49:54,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 20:49:54,165 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/bench-exp3x3-opt.wvr.c[2826,2839] [2022-12-05 20:49:54,169 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 20:49:54,175 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 20:49:54,206 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/bench-exp3x3-opt.wvr.c[2826,2839] [2022-12-05 20:49:54,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 20:49:54,218 INFO L208 MainTranslator]: Completed translation [2022-12-05 20:49:54,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:49:54 WrapperNode [2022-12-05 20:49:54,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 20:49:54,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 20:49:54,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 20:49:54,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 20:49:54,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:49:54" (1/1) ... [2022-12-05 20:49:54,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:49:54" (1/1) ... [2022-12-05 20:49:54,258 INFO L138 Inliner]: procedures = 25, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2022-12-05 20:49:54,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 20:49:54,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 20:49:54,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 20:49:54,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 20:49:54,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:49:54" (1/1) ... [2022-12-05 20:49:54,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:49:54" (1/1) ... [2022-12-05 20:49:54,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:49:54" (1/1) ... [2022-12-05 20:49:54,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:49:54" (1/1) ... [2022-12-05 20:49:54,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:49:54" (1/1) ... [2022-12-05 20:49:54,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:49:54" (1/1) ... [2022-12-05 20:49:54,298 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:49:54" (1/1) ... [2022-12-05 20:49:54,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:49:54" (1/1) ... [2022-12-05 20:49:54,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 20:49:54,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 20:49:54,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 20:49:54,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 20:49:54,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:49:54" (1/1) ... [2022-12-05 20:49:54,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 20:49:54,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:49:54,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-05 20:49:54,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-05 20:49:54,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 20:49:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 20:49:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 20:49:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 20:49:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 20:49:54,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 20:49:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 20:49:54,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 20:49:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-05 20:49:54,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-05 20:49:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-05 20:49:54,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-05 20:49:54,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 20:49:54,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-12-05 20:49:54,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-12-05 20:49:54,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-12-05 20:49:54,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-12-05 20:49:54,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 20:49:54,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 20:49:54,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 20:49:54,368 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 20:49:54,488 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 20:49:54,489 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 20:49:54,706 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 20:49:54,712 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 20:49:54,712 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-05 20:49:54,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 08:49:54 BoogieIcfgContainer [2022-12-05 20:49:54,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 20:49:54,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 20:49:54,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 20:49:54,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 20:49:54,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 08:49:54" (1/3) ... [2022-12-05 20:49:54,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@617f662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 08:49:54, skipping insertion in model container [2022-12-05 20:49:54,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:49:54" (2/3) ... [2022-12-05 20:49:54,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@617f662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 08:49:54, skipping insertion in model container [2022-12-05 20:49:54,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 08:49:54" (3/3) ... [2022-12-05 20:49:54,719 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp3x3-opt.wvr.c [2022-12-05 20:49:54,731 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 20:49:54,731 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 20:49:54,731 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 20:49:54,848 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-12-05 20:49:54,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 162 transitions, 372 flow [2022-12-05 20:49:54,960 INFO L130 PetriNetUnfolder]: 14/156 cut-off events. [2022-12-05 20:49:54,961 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-05 20:49:54,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 156 events. 14/156 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2022-12-05 20:49:54,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 162 transitions, 372 flow [2022-12-05 20:49:54,970 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 140 transitions, 316 flow [2022-12-05 20:49:54,971 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 20:49:54,990 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 140 transitions, 316 flow [2022-12-05 20:49:55,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 140 transitions, 316 flow [2022-12-05 20:49:55,049 INFO L130 PetriNetUnfolder]: 14/140 cut-off events. [2022-12-05 20:49:55,049 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-05 20:49:55,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 140 events. 14/140 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2022-12-05 20:49:55,055 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 140 transitions, 316 flow [2022-12-05 20:49:55,055 INFO L188 LiptonReduction]: Number of co-enabled transitions 2916 [2022-12-05 20:49:59,798 INFO L203 LiptonReduction]: Total number of compositions: 103 [2022-12-05 20:49:59,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 20:49:59,814 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;@382dbd3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 20:49:59,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-05 20:49:59,819 INFO L130 PetriNetUnfolder]: 6/36 cut-off events. [2022-12-05 20:49:59,820 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-05 20:49:59,820 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:49:59,820 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, 1, 1, 1] [2022-12-05 20:49:59,821 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 4 more)] === [2022-12-05 20:49:59,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:49:59,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1155012049, now seen corresponding path program 1 times [2022-12-05 20:49:59,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:49:59,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448480603] [2022-12-05 20:49:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:49:59,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:50:00,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:00,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448480603] [2022-12-05 20:50:00,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448480603] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:00,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:50:00,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-05 20:50:00,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351871913] [2022-12-05 20:50:00,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:00,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 20:50:00,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:00,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 20:50:00,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 20:50:00,479 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:00,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 110 flow. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 2 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 20:50:00,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:00,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:00,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:00,806 INFO L130 PetriNetUnfolder]: 3453/4197 cut-off events. [2022-12-05 20:50:00,806 INFO L131 PetriNetUnfolder]: For 305/305 co-relation queries the response was YES. [2022-12-05 20:50:00,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8766 conditions, 4197 events. 3453/4197 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11514 event pairs, 837 based on Foata normal form. 1/2408 useless extension candidates. Maximal degree in co-relation 6060. Up to 2419 conditions per place. [2022-12-05 20:50:00,834 INFO L137 encePairwiseOnDemand]: 33/37 looper letters, 59 selfloop transitions, 3 changer transitions 5/67 dead transitions. [2022-12-05 20:50:00,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 331 flow [2022-12-05 20:50:00,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 20:50:00,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 20:50:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2022-12-05 20:50:00,844 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6126126126126126 [2022-12-05 20:50:00,845 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 110 flow. Second operand 3 states and 68 transitions. [2022-12-05 20:50:00,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 331 flow [2022-12-05 20:50:00,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 67 transitions, 289 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-12-05 20:50:00,859 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 105 flow [2022-12-05 20:50:00,860 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2022-12-05 20:50:00,863 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, -9 predicate places. [2022-12-05 20:50:00,863 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 105 flow [2022-12-05 20:50:00,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 2 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 20:50:00,864 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:00,864 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, 1, 1, 1, 1] [2022-12-05 20:50:00,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 20:50:00,864 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 4 more)] === [2022-12-05 20:50:00,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:00,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1438143645, now seen corresponding path program 1 times [2022-12-05 20:50:00,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:00,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259515644] [2022-12-05 20:50:00,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:00,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:01,191 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 20:50:01,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:01,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259515644] [2022-12-05 20:50:01,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259515644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:01,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:50:01,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 20:50:01,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302811413] [2022-12-05 20:50:01,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:01,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 20:50:01,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:01,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 20:50:01,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 20:50:01,202 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:01,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:01,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:01,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:01,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:01,666 INFO L130 PetriNetUnfolder]: 5021/6142 cut-off events. [2022-12-05 20:50:01,666 INFO L131 PetriNetUnfolder]: For 981/981 co-relation queries the response was YES. [2022-12-05 20:50:01,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13815 conditions, 6142 events. 5021/6142 cut-off events. For 981/981 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19186 event pairs, 301 based on Foata normal form. 168/4628 useless extension candidates. Maximal degree in co-relation 7235. Up to 4928 conditions per place. [2022-12-05 20:50:01,684 INFO L137 encePairwiseOnDemand]: 28/37 looper letters, 74 selfloop transitions, 13 changer transitions 7/94 dead transitions. [2022-12-05 20:50:01,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 94 transitions, 425 flow [2022-12-05 20:50:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 20:50:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 20:50:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2022-12-05 20:50:01,687 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6351351351351351 [2022-12-05 20:50:01,687 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 105 flow. Second operand 4 states and 94 transitions. [2022-12-05 20:50:01,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 94 transitions, 425 flow [2022-12-05 20:50:01,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 94 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 20:50:01,689 INFO L231 Difference]: Finished difference. Result has 45 places, 51 transitions, 191 flow [2022-12-05 20:50:01,689 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=45, PETRI_TRANSITIONS=51} [2022-12-05 20:50:01,690 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2022-12-05 20:50:01,690 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 51 transitions, 191 flow [2022-12-05 20:50:01,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:01,690 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:01,690 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, 1, 1, 1, 1] [2022-12-05 20:50:01,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 20:50:01,690 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 4 more)] === [2022-12-05 20:50:01,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1792923337, now seen corresponding path program 1 times [2022-12-05 20:50:01,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:01,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231787638] [2022-12-05 20:50:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:01,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:50:01,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:01,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231787638] [2022-12-05 20:50:01,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231787638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:50:01,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416451067] [2022-12-05 20:50:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:01,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:01,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:50:01,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:50:01,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 20:50:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:01,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 20:50:01,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:50:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 20:50:02,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 20:50:02,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416451067] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:02,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 20:50:02,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-12-05 20:50:02,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7249024] [2022-12-05 20:50:02,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:02,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 20:50:02,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:02,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 20:50:02,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 20:50:02,139 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:02,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 51 transitions, 191 flow. Second operand has 3 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:02,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:02,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:02,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:02,583 INFO L130 PetriNetUnfolder]: 6737/8223 cut-off events. [2022-12-05 20:50:02,583 INFO L131 PetriNetUnfolder]: For 5845/5845 co-relation queries the response was YES. [2022-12-05 20:50:02,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23188 conditions, 8223 events. 6737/8223 cut-off events. For 5845/5845 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 25321 event pairs, 2303 based on Foata normal form. 1/8224 useless extension candidates. Maximal degree in co-relation 11873. Up to 5314 conditions per place. [2022-12-05 20:50:02,616 INFO L137 encePairwiseOnDemand]: 31/37 looper letters, 71 selfloop transitions, 13 changer transitions 1/85 dead transitions. [2022-12-05 20:50:02,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 85 transitions, 456 flow [2022-12-05 20:50:02,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 20:50:02,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 20:50:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2022-12-05 20:50:02,618 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2022-12-05 20:50:02,618 INFO L175 Difference]: Start difference. First operand has 45 places, 51 transitions, 191 flow. Second operand 3 states and 72 transitions. [2022-12-05 20:50:02,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 85 transitions, 456 flow [2022-12-05 20:50:02,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 85 transitions, 456 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 20:50:02,623 INFO L231 Difference]: Finished difference. Result has 48 places, 55 transitions, 256 flow [2022-12-05 20:50:02,623 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=48, PETRI_TRANSITIONS=55} [2022-12-05 20:50:02,624 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2022-12-05 20:50:02,624 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 256 flow [2022-12-05 20:50:02,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:02,624 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:02,624 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, 1, 1, 1, 1, 1] [2022-12-05 20:50:02,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 20:50:02,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:02,830 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 4 more)] === [2022-12-05 20:50:02,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:02,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1123309206, now seen corresponding path program 1 times [2022-12-05 20:50:02,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:02,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703992424] [2022-12-05 20:50:02,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:02,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:03,054 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 20:50:03,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:03,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703992424] [2022-12-05 20:50:03,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703992424] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:03,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:50:03,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 20:50:03,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536898918] [2022-12-05 20:50:03,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:03,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 20:50:03,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:03,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 20:50:03,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 20:50:03,056 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:03,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 55 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:03,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:03,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:03,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:03,606 INFO L130 PetriNetUnfolder]: 6581/8067 cut-off events. [2022-12-05 20:50:03,606 INFO L131 PetriNetUnfolder]: For 10006/10006 co-relation queries the response was YES. [2022-12-05 20:50:03,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25610 conditions, 8067 events. 6581/8067 cut-off events. For 10006/10006 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 26093 event pairs, 1203 based on Foata normal form. 156/8223 useless extension candidates. Maximal degree in co-relation 13574. Up to 6853 conditions per place. [2022-12-05 20:50:03,634 INFO L137 encePairwiseOnDemand]: 28/37 looper letters, 80 selfloop transitions, 19 changer transitions 9/108 dead transitions. [2022-12-05 20:50:03,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 108 transitions, 644 flow [2022-12-05 20:50:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 20:50:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 20:50:03,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2022-12-05 20:50:03,636 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6351351351351351 [2022-12-05 20:50:03,636 INFO L175 Difference]: Start difference. First operand has 48 places, 55 transitions, 256 flow. Second operand 4 states and 94 transitions. [2022-12-05 20:50:03,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 108 transitions, 644 flow [2022-12-05 20:50:03,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 108 transitions, 619 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-05 20:50:03,645 INFO L231 Difference]: Finished difference. Result has 51 places, 63 transitions, 336 flow [2022-12-05 20:50:03,645 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=51, PETRI_TRANSITIONS=63} [2022-12-05 20:50:03,646 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2022-12-05 20:50:03,646 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 63 transitions, 336 flow [2022-12-05 20:50:03,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:03,646 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:03,646 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, 1, 1, 1, 1, 1] [2022-12-05 20:50:03,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 20:50:03,646 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 4 more)] === [2022-12-05 20:50:03,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:03,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1861717892, now seen corresponding path program 2 times [2022-12-05 20:50:03,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:03,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152863812] [2022-12-05 20:50:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:03,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:03,805 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 20:50:03,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:03,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152863812] [2022-12-05 20:50:03,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152863812] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:50:03,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331580578] [2022-12-05 20:50:03,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 20:50:03,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:03,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:50:03,807 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:50:03,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 20:50:03,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-05 20:50:03,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:50:03,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 20:50:03,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:50:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 20:50:03,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 20:50:03,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331580578] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:03,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 20:50:03,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-12-05 20:50:03,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830732727] [2022-12-05 20:50:03,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:03,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 20:50:03,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:03,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 20:50:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 20:50:03,978 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:03,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 63 transitions, 336 flow. Second operand has 3 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:03,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:03,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:03,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:04,642 INFO L130 PetriNetUnfolder]: 9661/11781 cut-off events. [2022-12-05 20:50:04,642 INFO L131 PetriNetUnfolder]: For 13779/13779 co-relation queries the response was YES. [2022-12-05 20:50:04,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36266 conditions, 11781 events. 9661/11781 cut-off events. For 13779/13779 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 37948 event pairs, 3323 based on Foata normal form. 1/11782 useless extension candidates. Maximal degree in co-relation 17929. Up to 6938 conditions per place. [2022-12-05 20:50:04,689 INFO L137 encePairwiseOnDemand]: 33/37 looper letters, 77 selfloop transitions, 13 changer transitions 1/91 dead transitions. [2022-12-05 20:50:04,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 91 transitions, 613 flow [2022-12-05 20:50:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 20:50:04,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 20:50:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2022-12-05 20:50:04,692 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5765765765765766 [2022-12-05 20:50:04,692 INFO L175 Difference]: Start difference. First operand has 51 places, 63 transitions, 336 flow. Second operand 3 states and 64 transitions. [2022-12-05 20:50:04,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 91 transitions, 613 flow [2022-12-05 20:50:04,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 91 transitions, 596 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 20:50:04,702 INFO L231 Difference]: Finished difference. Result has 53 places, 65 transitions, 372 flow [2022-12-05 20:50:04,702 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=372, PETRI_PLACES=53, PETRI_TRANSITIONS=65} [2022-12-05 20:50:04,704 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2022-12-05 20:50:04,704 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 65 transitions, 372 flow [2022-12-05 20:50:04,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:04,705 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:04,705 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, 1, 1, 1, 1, 1] [2022-12-05 20:50:04,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 20:50:04,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:04,914 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 4 more)] === [2022-12-05 20:50:04,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:04,914 INFO L85 PathProgramCache]: Analyzing trace with hash -884258649, now seen corresponding path program 1 times [2022-12-05 20:50:04,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:04,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841510239] [2022-12-05 20:50:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:04,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:05,130 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 20:50:05,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:05,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841510239] [2022-12-05 20:50:05,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841510239] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:05,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:50:05,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 20:50:05,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091404042] [2022-12-05 20:50:05,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:05,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 20:50:05,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:05,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 20:50:05,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 20:50:05,132 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:05,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 65 transitions, 372 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:05,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:05,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:05,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:05,878 INFO L130 PetriNetUnfolder]: 9535/11655 cut-off events. [2022-12-05 20:50:05,879 INFO L131 PetriNetUnfolder]: For 18618/18618 co-relation queries the response was YES. [2022-12-05 20:50:05,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37615 conditions, 11655 events. 9535/11655 cut-off events. For 18618/18618 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 38860 event pairs, 2759 based on Foata normal form. 126/11781 useless extension candidates. Maximal degree in co-relation 20673. Up to 10441 conditions per place. [2022-12-05 20:50:05,928 INFO L137 encePairwiseOnDemand]: 28/37 looper letters, 80 selfloop transitions, 27 changer transitions 15/122 dead transitions. [2022-12-05 20:50:05,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 122 transitions, 830 flow [2022-12-05 20:50:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 20:50:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 20:50:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2022-12-05 20:50:05,930 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6351351351351351 [2022-12-05 20:50:05,930 INFO L175 Difference]: Start difference. First operand has 53 places, 65 transitions, 372 flow. Second operand 4 states and 94 transitions. [2022-12-05 20:50:05,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 122 transitions, 830 flow [2022-12-05 20:50:05,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 122 transitions, 817 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 20:50:05,944 INFO L231 Difference]: Finished difference. Result has 56 places, 75 transitions, 510 flow [2022-12-05 20:50:05,944 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=510, PETRI_PLACES=56, PETRI_TRANSITIONS=75} [2022-12-05 20:50:05,946 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2022-12-05 20:50:05,946 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 75 transitions, 510 flow [2022-12-05 20:50:05,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:05,946 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:05,947 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, 1, 1, 1, 1, 1] [2022-12-05 20:50:05,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-05 20:50:05,947 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 4 more)] === [2022-12-05 20:50:05,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:05,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1810715049, now seen corresponding path program 1 times [2022-12-05 20:50:05,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:05,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563699659] [2022-12-05 20:50:05,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:05,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:06,190 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 20:50:06,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:06,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563699659] [2022-12-05 20:50:06,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563699659] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:50:06,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303692926] [2022-12-05 20:50:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:06,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:06,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:50:06,192 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:50:06,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 20:50:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:06,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 20:50:06,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:50:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 20:50:06,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 20:50:06,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303692926] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:06,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 20:50:06,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-12-05 20:50:06,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768943621] [2022-12-05 20:50:06,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:06,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 20:50:06,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:06,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 20:50:06,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 20:50:06,375 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:06,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 75 transitions, 510 flow. Second operand has 3 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:06,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:06,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:06,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:07,280 INFO L130 PetriNetUnfolder]: 12615/15369 cut-off events. [2022-12-05 20:50:07,281 INFO L131 PetriNetUnfolder]: For 25466/25466 co-relation queries the response was YES. [2022-12-05 20:50:07,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51055 conditions, 15369 events. 12615/15369 cut-off events. For 25466/25466 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 51483 event pairs, 5569 based on Foata normal form. 1/15370 useless extension candidates. Maximal degree in co-relation 24317. Up to 8756 conditions per place. [2022-12-05 20:50:07,333 INFO L137 encePairwiseOnDemand]: 33/37 looper letters, 89 selfloop transitions, 13 changer transitions 9/111 dead transitions. [2022-12-05 20:50:07,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 111 transitions, 855 flow [2022-12-05 20:50:07,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 20:50:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 20:50:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2022-12-05 20:50:07,334 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2022-12-05 20:50:07,334 INFO L175 Difference]: Start difference. First operand has 56 places, 75 transitions, 510 flow. Second operand 3 states and 72 transitions. [2022-12-05 20:50:07,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 111 transitions, 855 flow [2022-12-05 20:50:07,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 111 transitions, 830 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 20:50:07,353 INFO L231 Difference]: Finished difference. Result has 58 places, 77 transitions, 538 flow [2022-12-05 20:50:07,353 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=538, PETRI_PLACES=58, PETRI_TRANSITIONS=77} [2022-12-05 20:50:07,354 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2022-12-05 20:50:07,354 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 77 transitions, 538 flow [2022-12-05 20:50:07,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:07,354 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:07,354 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, 1, 1, 1, 1, 1, 1] [2022-12-05 20:50:07,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 20:50:07,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:07,559 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 4 more)] === [2022-12-05 20:50:07,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:07,560 INFO L85 PathProgramCache]: Analyzing trace with hash -380031148, now seen corresponding path program 1 times [2022-12-05 20:50:07,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:07,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750053803] [2022-12-05 20:50:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:07,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:07,767 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 20:50:07,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:07,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750053803] [2022-12-05 20:50:07,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750053803] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:50:07,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995951544] [2022-12-05 20:50:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:07,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:07,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:50:07,769 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:50:07,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 20:50:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:07,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-05 20:50:07,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:50:07,944 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 20:50:07,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:50:07,986 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 20:50:07,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995951544] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:50:07,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:50:07,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-05 20:50:07,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659722068] [2022-12-05 20:50:07,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:50:07,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 20:50:07,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:07,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 20:50:07,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-05 20:50:07,989 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:07,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 77 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:07,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:07,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:07,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:09,236 INFO L130 PetriNetUnfolder]: 17771/21680 cut-off events. [2022-12-05 20:50:09,236 INFO L131 PetriNetUnfolder]: For 39438/39438 co-relation queries the response was YES. [2022-12-05 20:50:09,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74238 conditions, 21680 events. 17771/21680 cut-off events. For 39438/39438 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 79348 event pairs, 3875 based on Foata normal form. 565/22245 useless extension candidates. Maximal degree in co-relation 39334. Up to 8936 conditions per place. [2022-12-05 20:50:09,310 INFO L137 encePairwiseOnDemand]: 27/37 looper letters, 127 selfloop transitions, 32 changer transitions 35/194 dead transitions. [2022-12-05 20:50:09,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 194 transitions, 1337 flow [2022-12-05 20:50:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 20:50:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 20:50:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2022-12-05 20:50:09,311 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6981981981981982 [2022-12-05 20:50:09,312 INFO L175 Difference]: Start difference. First operand has 58 places, 77 transitions, 538 flow. Second operand 6 states and 155 transitions. [2022-12-05 20:50:09,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 194 transitions, 1337 flow [2022-12-05 20:50:09,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 194 transitions, 1324 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 20:50:09,341 INFO L231 Difference]: Finished difference. Result has 64 places, 79 transitions, 620 flow [2022-12-05 20:50:09,342 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=620, PETRI_PLACES=64, PETRI_TRANSITIONS=79} [2022-12-05 20:50:09,342 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2022-12-05 20:50:09,342 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 79 transitions, 620 flow [2022-12-05 20:50:09,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:09,342 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:09,343 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, 1, 1, 1, 1, 1, 1] [2022-12-05 20:50:09,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 20:50:09,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:09,547 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 4 more)] === [2022-12-05 20:50:09,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:09,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1566953028, now seen corresponding path program 1 times [2022-12-05 20:50:09,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:09,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966601406] [2022-12-05 20:50:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:09,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:09,687 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 20:50:09,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:09,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966601406] [2022-12-05 20:50:09,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966601406] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:50:09,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42618354] [2022-12-05 20:50:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:09,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:09,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:50:09,689 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:50:09,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 20:50:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:09,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-05 20:50:09,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:50:09,852 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 20:50:09,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:50:09,903 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 20:50:09,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42618354] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:50:09,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:50:09,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-05 20:50:09,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605277511] [2022-12-05 20:50:09,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:50:09,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 20:50:09,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:09,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 20:50:09,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-05 20:50:09,905 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:09,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 79 transitions, 620 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:09,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:09,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:09,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:11,554 INFO L130 PetriNetUnfolder]: 23171/28330 cut-off events. [2022-12-05 20:50:11,554 INFO L131 PetriNetUnfolder]: For 66981/66981 co-relation queries the response was YES. [2022-12-05 20:50:11,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103779 conditions, 28330 events. 23171/28330 cut-off events. For 66981/66981 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 108717 event pairs, 3641 based on Foata normal form. 757/29087 useless extension candidates. Maximal degree in co-relation 59241. Up to 10010 conditions per place. [2022-12-05 20:50:11,677 INFO L137 encePairwiseOnDemand]: 27/37 looper letters, 142 selfloop transitions, 32 changer transitions 18/192 dead transitions. [2022-12-05 20:50:11,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 192 transitions, 1497 flow [2022-12-05 20:50:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 20:50:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 20:50:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2022-12-05 20:50:11,680 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6441441441441441 [2022-12-05 20:50:11,680 INFO L175 Difference]: Start difference. First operand has 64 places, 79 transitions, 620 flow. Second operand 6 states and 143 transitions. [2022-12-05 20:50:11,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 192 transitions, 1497 flow [2022-12-05 20:50:11,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 192 transitions, 1439 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-12-05 20:50:11,740 INFO L231 Difference]: Finished difference. Result has 69 places, 81 transitions, 673 flow [2022-12-05 20:50:11,740 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=673, PETRI_PLACES=69, PETRI_TRANSITIONS=81} [2022-12-05 20:50:11,741 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2022-12-05 20:50:11,741 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 81 transitions, 673 flow [2022-12-05 20:50:11,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:11,741 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:11,741 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, 1, 1, 1, 1, 1, 1] [2022-12-05 20:50:11,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-05 20:50:11,941 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 20:50:11,942 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 4 more)] === [2022-12-05 20:50:11,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1775078782, now seen corresponding path program 1 times [2022-12-05 20:50:11,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:11,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403138417] [2022-12-05 20:50:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:11,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:12,153 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 20:50:12,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:12,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403138417] [2022-12-05 20:50:12,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403138417] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:50:12,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109824639] [2022-12-05 20:50:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:12,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:12,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:50:12,156 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:50:12,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 20:50:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:12,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-05 20:50:12,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:50:12,338 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 20:50:12,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:50:12,388 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 20:50:12,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109824639] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:50:12,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:50:12,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-05 20:50:12,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417772190] [2022-12-05 20:50:12,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:50:12,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 20:50:12,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:12,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 20:50:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-05 20:50:12,391 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:12,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 81 transitions, 673 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:12,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:12,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:12,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:14,885 INFO L130 PetriNetUnfolder]: 32931/40393 cut-off events. [2022-12-05 20:50:14,885 INFO L131 PetriNetUnfolder]: For 118631/118631 co-relation queries the response was YES. [2022-12-05 20:50:14,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158874 conditions, 40393 events. 32931/40393 cut-off events. For 118631/118631 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 168110 event pairs, 4753 based on Foata normal form. 1321/41714 useless extension candidates. Maximal degree in co-relation 81011. Up to 17631 conditions per place. [2022-12-05 20:50:15,021 INFO L137 encePairwiseOnDemand]: 27/37 looper letters, 165 selfloop transitions, 30 changer transitions 25/220 dead transitions. [2022-12-05 20:50:15,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 220 transitions, 1816 flow [2022-12-05 20:50:15,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 20:50:15,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 20:50:15,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2022-12-05 20:50:15,022 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6801801801801802 [2022-12-05 20:50:15,022 INFO L175 Difference]: Start difference. First operand has 69 places, 81 transitions, 673 flow. Second operand 6 states and 151 transitions. [2022-12-05 20:50:15,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 220 transitions, 1816 flow [2022-12-05 20:50:15,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 220 transitions, 1752 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-12-05 20:50:15,189 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 716 flow [2022-12-05 20:50:15,189 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=716, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2022-12-05 20:50:15,190 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2022-12-05 20:50:15,190 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 716 flow [2022-12-05 20:50:15,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:15,190 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:15,190 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, 1, 1, 1, 1, 1, 1] [2022-12-05 20:50:15,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 20:50:15,394 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 20:50:15,394 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 4 more)] === [2022-12-05 20:50:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:15,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1899891782, now seen corresponding path program 1 times [2022-12-05 20:50:15,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:15,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090281287] [2022-12-05 20:50:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:15,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:15,567 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 20:50:15,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:15,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090281287] [2022-12-05 20:50:15,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090281287] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:15,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:50:15,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 20:50:15,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913497950] [2022-12-05 20:50:15,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:15,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 20:50:15,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:15,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 20:50:15,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 20:50:15,569 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:15,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 716 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 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 20:50:15,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:15,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:15,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:18,495 INFO L130 PetriNetUnfolder]: 37866/46390 cut-off events. [2022-12-05 20:50:18,495 INFO L131 PetriNetUnfolder]: For 156657/156657 co-relation queries the response was YES. [2022-12-05 20:50:18,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197452 conditions, 46390 events. 37866/46390 cut-off events. For 156657/156657 co-relation queries the response was YES. Maximal size of possible extension queue 1196. Compared 191269 event pairs, 12238 based on Foata normal form. 1116/47506 useless extension candidates. Maximal degree in co-relation 102719. Up to 40691 conditions per place. [2022-12-05 20:50:18,678 INFO L137 encePairwiseOnDemand]: 29/37 looper letters, 100 selfloop transitions, 26 changer transitions 12/138 dead transitions. [2022-12-05 20:50:18,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 138 transitions, 1247 flow [2022-12-05 20:50:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 20:50:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 20:50:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2022-12-05 20:50:18,679 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2022-12-05 20:50:18,679 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 716 flow. Second operand 4 states and 92 transitions. [2022-12-05 20:50:18,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 138 transitions, 1247 flow [2022-12-05 20:50:19,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 138 transitions, 1184 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-12-05 20:50:19,390 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 730 flow [2022-12-05 20:50:19,390 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=730, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2022-12-05 20:50:19,390 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2022-12-05 20:50:19,390 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 730 flow [2022-12-05 20:50:19,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 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 20:50:19,391 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:19,391 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, 1, 1, 1, 1, 1, 1] [2022-12-05 20:50:19,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-05 20:50:19,391 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 4 more)] === [2022-12-05 20:50:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:19,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1181021440, now seen corresponding path program 2 times [2022-12-05 20:50:19,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:19,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184636724] [2022-12-05 20:50:19,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:19,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:19,523 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 20:50:19,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:19,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184636724] [2022-12-05 20:50:19,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184636724] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:19,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:50:19,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 20:50:19,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374954411] [2022-12-05 20:50:19,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:19,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 20:50:19,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:19,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 20:50:19,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 20:50:19,524 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:19,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 730 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 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 20:50:19,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:19,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:19,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:22,611 INFO L130 PetriNetUnfolder]: 43850/53622 cut-off events. [2022-12-05 20:50:22,611 INFO L131 PetriNetUnfolder]: For 168551/168551 co-relation queries the response was YES. [2022-12-05 20:50:22,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229870 conditions, 53622 events. 43850/53622 cut-off events. For 168551/168551 co-relation queries the response was YES. Maximal size of possible extension queue 1370. Compared 224552 event pairs, 14414 based on Foata normal form. 1248/54870 useless extension candidates. Maximal degree in co-relation 125128. Up to 47075 conditions per place. [2022-12-05 20:50:22,833 INFO L137 encePairwiseOnDemand]: 29/37 looper letters, 105 selfloop transitions, 26 changer transitions 12/143 dead transitions. [2022-12-05 20:50:22,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 143 transitions, 1307 flow [2022-12-05 20:50:22,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 20:50:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 20:50:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2022-12-05 20:50:22,834 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2022-12-05 20:50:22,834 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 730 flow. Second operand 4 states and 92 transitions. [2022-12-05 20:50:22,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 143 transitions, 1307 flow [2022-12-05 20:50:23,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 143 transitions, 1258 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-05 20:50:23,398 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 746 flow [2022-12-05 20:50:23,398 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=746, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2022-12-05 20:50:23,399 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2022-12-05 20:50:23,399 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 746 flow [2022-12-05 20:50:23,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 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 20:50:23,399 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:23,399 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, 1, 1, 1, 1, 1, 1] [2022-12-05 20:50:23,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-05 20:50:23,399 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 4 more)] === [2022-12-05 20:50:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:23,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1278856560, now seen corresponding path program 3 times [2022-12-05 20:50:23,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:23,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062378723] [2022-12-05 20:50:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:23,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:23,534 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 20:50:23,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:23,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062378723] [2022-12-05 20:50:23,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062378723] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:23,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:50:23,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 20:50:23,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353007630] [2022-12-05 20:50:23,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:23,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 20:50:23,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:23,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 20:50:23,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 20:50:23,535 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:23,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 746 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 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 20:50:23,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:23,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:23,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:27,041 INFO L130 PetriNetUnfolder]: 47994/58602 cut-off events. [2022-12-05 20:50:27,041 INFO L131 PetriNetUnfolder]: For 195208/195208 co-relation queries the response was YES. [2022-12-05 20:50:27,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257207 conditions, 58602 events. 47994/58602 cut-off events. For 195208/195208 co-relation queries the response was YES. Maximal size of possible extension queue 1503. Compared 246889 event pairs, 15948 based on Foata normal form. 836/59438 useless extension candidates. Maximal degree in co-relation 157928. Up to 53907 conditions per place. [2022-12-05 20:50:27,267 INFO L137 encePairwiseOnDemand]: 29/37 looper letters, 102 selfloop transitions, 26 changer transitions 12/140 dead transitions. [2022-12-05 20:50:27,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 140 transitions, 1279 flow [2022-12-05 20:50:27,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 20:50:27,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 20:50:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2022-12-05 20:50:27,268 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2022-12-05 20:50:27,268 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 746 flow. Second operand 4 states and 92 transitions. [2022-12-05 20:50:27,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 140 transitions, 1279 flow [2022-12-05 20:50:27,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 140 transitions, 1230 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-05 20:50:27,888 INFO L231 Difference]: Finished difference. Result has 79 places, 86 transitions, 764 flow [2022-12-05 20:50:27,888 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=764, PETRI_PLACES=79, PETRI_TRANSITIONS=86} [2022-12-05 20:50:27,888 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 29 predicate places. [2022-12-05 20:50:27,888 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 86 transitions, 764 flow [2022-12-05 20:50:27,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 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 20:50:27,889 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:27,889 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:50:27,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-05 20:50:27,889 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 4 more)] === [2022-12-05 20:50:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash -724400335, now seen corresponding path program 1 times [2022-12-05 20:50:27,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:27,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463938396] [2022-12-05 20:50:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:27,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:28,010 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 20:50:28,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:28,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463938396] [2022-12-05 20:50:28,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463938396] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:50:28,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790314435] [2022-12-05 20:50:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:28,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:28,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:50:28,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:50:28,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 20:50:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:28,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-05 20:50:28,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:50:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 20:50:28,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 20:50:28,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790314435] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:28,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 20:50:28,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-05 20:50:28,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564502774] [2022-12-05 20:50:28,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:28,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 20:50:28,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:28,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 20:50:28,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-05 20:50:28,184 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:28,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 86 transitions, 764 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:28,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:28,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:28,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:31,142 INFO L130 PetriNetUnfolder]: 41648/50891 cut-off events. [2022-12-05 20:50:31,143 INFO L131 PetriNetUnfolder]: For 181758/181758 co-relation queries the response was YES. [2022-12-05 20:50:31,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226290 conditions, 50891 events. 41648/50891 cut-off events. For 181758/181758 co-relation queries the response was YES. Maximal size of possible extension queue 1319. Compared 217347 event pairs, 3796 based on Foata normal form. 1276/52167 useless extension candidates. Maximal degree in co-relation 189081. Up to 23987 conditions per place. [2022-12-05 20:50:31,348 INFO L137 encePairwiseOnDemand]: 32/37 looper letters, 134 selfloop transitions, 12 changer transitions 53/199 dead transitions. [2022-12-05 20:50:31,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 199 transitions, 1818 flow [2022-12-05 20:50:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 20:50:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 20:50:31,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2022-12-05 20:50:31,350 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6 [2022-12-05 20:50:31,350 INFO L175 Difference]: Start difference. First operand has 79 places, 86 transitions, 764 flow. Second operand 5 states and 111 transitions. [2022-12-05 20:50:31,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 199 transitions, 1818 flow [2022-12-05 20:50:31,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 199 transitions, 1758 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-05 20:50:31,944 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 625 flow [2022-12-05 20:50:31,944 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=625, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2022-12-05 20:50:31,944 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 32 predicate places. [2022-12-05 20:50:31,944 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 625 flow [2022-12-05 20:50:31,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:31,944 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:31,945 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:50:31,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-05 20:50:32,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:32,147 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 4 more)] === [2022-12-05 20:50:32,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:32,148 INFO L85 PathProgramCache]: Analyzing trace with hash 823035286, now seen corresponding path program 1 times [2022-12-05 20:50:32,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:32,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028972612] [2022-12-05 20:50:32,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:32,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:32,309 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 20:50:32,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:32,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028972612] [2022-12-05 20:50:32,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028972612] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:32,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:50:32,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 20:50:32,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949898296] [2022-12-05 20:50:32,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:32,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 20:50:32,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:32,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 20:50:32,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-05 20:50:32,310 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:32,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 625 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:32,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:32,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:32,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:34,930 INFO L130 PetriNetUnfolder]: 35442/43051 cut-off events. [2022-12-05 20:50:34,930 INFO L131 PetriNetUnfolder]: For 168114/168114 co-relation queries the response was YES. [2022-12-05 20:50:35,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195587 conditions, 43051 events. 35442/43051 cut-off events. For 168114/168114 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 172957 event pairs, 6308 based on Foata normal form. 552/43603 useless extension candidates. Maximal degree in co-relation 131395. Up to 24760 conditions per place. [2022-12-05 20:50:35,142 INFO L137 encePairwiseOnDemand]: 28/37 looper letters, 103 selfloop transitions, 12 changer transitions 32/147 dead transitions. [2022-12-05 20:50:35,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 147 transitions, 1262 flow [2022-12-05 20:50:35,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 20:50:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 20:50:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2022-12-05 20:50:35,143 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5513513513513514 [2022-12-05 20:50:35,143 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 625 flow. Second operand 5 states and 102 transitions. [2022-12-05 20:50:35,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 147 transitions, 1262 flow [2022-12-05 20:50:35,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 147 transitions, 1214 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-12-05 20:50:35,771 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 526 flow [2022-12-05 20:50:35,771 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=526, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2022-12-05 20:50:35,772 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2022-12-05 20:50:35,772 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 526 flow [2022-12-05 20:50:35,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:35,772 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:35,772 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:50:35,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-05 20:50:35,772 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 4 more)] === [2022-12-05 20:50:35,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:35,773 INFO L85 PathProgramCache]: Analyzing trace with hash -654194955, now seen corresponding path program 2 times [2022-12-05 20:50:35,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:35,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058127912] [2022-12-05 20:50:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:35,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 20:50:35,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058127912] [2022-12-05 20:50:35,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058127912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:50:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194824686] [2022-12-05 20:50:35,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 20:50:35,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:35,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:50:35,916 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:50:35,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-05 20:50:36,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 20:50:36,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:50:36,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-05 20:50:36,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:50:36,141 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 20:50:36,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:50:36,219 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 20:50:36,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194824686] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:50:36,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:50:36,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-12-05 20:50:36,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990004230] [2022-12-05 20:50:36,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:50:36,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 20:50:36,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:36,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 20:50:36,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-05 20:50:36,222 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:36,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 70 transitions, 526 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:36,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:36,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:36,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:39,612 INFO L130 PetriNetUnfolder]: 38374/46595 cut-off events. [2022-12-05 20:50:39,612 INFO L131 PetriNetUnfolder]: For 196027/196027 co-relation queries the response was YES. [2022-12-05 20:50:39,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212176 conditions, 46595 events. 38374/46595 cut-off events. For 196027/196027 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 188454 event pairs, 732 based on Foata normal form. 1678/48273 useless extension candidates. Maximal degree in co-relation 157330. Up to 13836 conditions per place. [2022-12-05 20:50:39,825 INFO L137 encePairwiseOnDemand]: 26/37 looper letters, 304 selfloop transitions, 46 changer transitions 124/474 dead transitions. [2022-12-05 20:50:39,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 474 transitions, 3883 flow [2022-12-05 20:50:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-05 20:50:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-05 20:50:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 341 transitions. [2022-12-05 20:50:39,827 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4850640113798009 [2022-12-05 20:50:39,827 INFO L175 Difference]: Start difference. First operand has 83 places, 70 transitions, 526 flow. Second operand 19 states and 341 transitions. [2022-12-05 20:50:39,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 474 transitions, 3883 flow [2022-12-05 20:50:40,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 474 transitions, 3813 flow, removed 16 selfloop flow, removed 3 redundant places. [2022-12-05 20:50:40,640 INFO L231 Difference]: Finished difference. Result has 106 places, 98 transitions, 863 flow [2022-12-05 20:50:40,640 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=863, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2022-12-05 20:50:40,640 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 56 predicate places. [2022-12-05 20:50:40,641 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 863 flow [2022-12-05 20:50:40,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:40,641 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:40,641 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:50:40,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-05 20:50:40,845 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,SelfDestructingSolverStorable15 [2022-12-05 20:50:40,846 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 4 more)] === [2022-12-05 20:50:40,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:40,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1651234004, now seen corresponding path program 1 times [2022-12-05 20:50:40,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:40,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070524252] [2022-12-05 20:50:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:40,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:40,999 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 20:50:41,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:41,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070524252] [2022-12-05 20:50:41,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070524252] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:50:41,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43520286] [2022-12-05 20:50:41,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:41,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:41,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:50:41,001 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:50:41,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-05 20:50:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:41,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-05 20:50:41,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:50:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 20:50:41,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 20:50:41,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43520286] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:41,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 20:50:41,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-05 20:50:41,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203156721] [2022-12-05 20:50:41,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:41,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 20:50:41,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:41,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 20:50:41,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-05 20:50:41,183 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:41,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 863 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:41,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:41,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:41,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:43,212 INFO L130 PetriNetUnfolder]: 22504/27176 cut-off events. [2022-12-05 20:50:43,213 INFO L131 PetriNetUnfolder]: For 234352/234352 co-relation queries the response was YES. [2022-12-05 20:50:43,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148120 conditions, 27176 events. 22504/27176 cut-off events. For 234352/234352 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 101035 event pairs, 1474 based on Foata normal form. 712/27888 useless extension candidates. Maximal degree in co-relation 136044. Up to 11186 conditions per place. [2022-12-05 20:50:43,359 INFO L137 encePairwiseOnDemand]: 32/37 looper letters, 201 selfloop transitions, 8 changer transitions 65/274 dead transitions. [2022-12-05 20:50:43,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 274 transitions, 2852 flow [2022-12-05 20:50:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 20:50:43,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 20:50:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2022-12-05 20:50:43,361 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6 [2022-12-05 20:50:43,361 INFO L175 Difference]: Start difference. First operand has 106 places, 98 transitions, 863 flow. Second operand 5 states and 111 transitions. [2022-12-05 20:50:43,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 274 transitions, 2852 flow [2022-12-05 20:50:44,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 274 transitions, 2569 flow, removed 110 selfloop flow, removed 5 redundant places. [2022-12-05 20:50:44,037 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 789 flow [2022-12-05 20:50:44,037 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=789, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2022-12-05 20:50:44,037 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 50 predicate places. [2022-12-05 20:50:44,037 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 789 flow [2022-12-05 20:50:44,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:44,038 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:44,038 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:50:44,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-05 20:50:44,241 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,SelfDestructingSolverStorable16 [2022-12-05 20:50:44,242 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 4 more)] === [2022-12-05 20:50:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash -183682528, now seen corresponding path program 2 times [2022-12-05 20:50:44,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:44,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505089288] [2022-12-05 20:50:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:44,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 20:50:44,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:44,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505089288] [2022-12-05 20:50:44,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505089288] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:50:44,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610775744] [2022-12-05 20:50:44,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 20:50:44,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:44,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:50:44,376 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:50:44,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-05 20:50:44,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 20:50:44,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:50:44,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-05 20:50:44,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:50:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 20:50:44,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 20:50:44,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610775744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:44,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 20:50:44,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-05 20:50:44,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462883867] [2022-12-05 20:50:44,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:44,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 20:50:44,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:44,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 20:50:44,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-05 20:50:44,588 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:44,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 789 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:44,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:44,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:44,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:46,089 INFO L130 PetriNetUnfolder]: 19048/22825 cut-off events. [2022-12-05 20:50:46,089 INFO L131 PetriNetUnfolder]: For 149755/149755 co-relation queries the response was YES. [2022-12-05 20:50:46,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121284 conditions, 22825 events. 19048/22825 cut-off events. For 149755/149755 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 78354 event pairs, 3984 based on Foata normal form. 528/23353 useless extension candidates. Maximal degree in co-relation 108304. Up to 16505 conditions per place. [2022-12-05 20:50:46,221 INFO L137 encePairwiseOnDemand]: 33/37 looper letters, 198 selfloop transitions, 9 changer transitions 0/207 dead transitions. [2022-12-05 20:50:46,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 207 transitions, 2003 flow [2022-12-05 20:50:46,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 20:50:46,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 20:50:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2022-12-05 20:50:46,222 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5337837837837838 [2022-12-05 20:50:46,222 INFO L175 Difference]: Start difference. First operand has 100 places, 98 transitions, 789 flow. Second operand 4 states and 79 transitions. [2022-12-05 20:50:46,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 207 transitions, 2003 flow [2022-12-05 20:50:46,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 207 transitions, 1977 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-05 20:50:46,709 INFO L231 Difference]: Finished difference. Result has 101 places, 99 transitions, 799 flow [2022-12-05 20:50:46,709 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=799, PETRI_PLACES=101, PETRI_TRANSITIONS=99} [2022-12-05 20:50:46,710 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 51 predicate places. [2022-12-05 20:50:46,710 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 99 transitions, 799 flow [2022-12-05 20:50:46,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:46,710 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:46,710 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:50:46,715 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 20:50:46,914 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,SelfDestructingSolverStorable17 [2022-12-05 20:50:46,914 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 4 more)] === [2022-12-05 20:50:46,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:46,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1683675655, now seen corresponding path program 1 times [2022-12-05 20:50:46,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:46,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316929113] [2022-12-05 20:50:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:46,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:47,060 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 20:50:47,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:47,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316929113] [2022-12-05 20:50:47,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316929113] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:50:47,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572673969] [2022-12-05 20:50:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:47,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:47,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:50:47,062 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 20:50:47,075 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 20:50:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:47,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-05 20:50:47,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:50:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-05 20:50:47,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 20:50:47,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572673969] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:50:47,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 20:50:47,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-05 20:50:47,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24092827] [2022-12-05 20:50:47,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:50:47,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 20:50:47,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:50:47,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 20:50:47,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-05 20:50:47,243 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 37 [2022-12-05 20:50:47,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 99 transitions, 799 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:47,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:50:47,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 37 [2022-12-05 20:50:47,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:50:49,157 INFO L130 PetriNetUnfolder]: 22304/26705 cut-off events. [2022-12-05 20:50:49,158 INFO L131 PetriNetUnfolder]: For 180068/180068 co-relation queries the response was YES. [2022-12-05 20:50:49,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145184 conditions, 26705 events. 22304/26705 cut-off events. For 180068/180068 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 92417 event pairs, 1842 based on Foata normal form. 624/27329 useless extension candidates. Maximal degree in co-relation 126047. Up to 16805 conditions per place. [2022-12-05 20:50:49,328 INFO L137 encePairwiseOnDemand]: 33/37 looper letters, 154 selfloop transitions, 19 changer transitions 0/173 dead transitions. [2022-12-05 20:50:49,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 173 transitions, 1672 flow [2022-12-05 20:50:49,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 20:50:49,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 20:50:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2022-12-05 20:50:49,329 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5337837837837838 [2022-12-05 20:50:49,329 INFO L175 Difference]: Start difference. First operand has 101 places, 99 transitions, 799 flow. Second operand 4 states and 79 transitions. [2022-12-05 20:50:49,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 173 transitions, 1672 flow [2022-12-05 20:50:49,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 173 transitions, 1634 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-12-05 20:50:49,831 INFO L231 Difference]: Finished difference. Result has 103 places, 100 transitions, 840 flow [2022-12-05 20:50:49,831 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=840, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2022-12-05 20:50:49,831 INFO L294 CegarLoopForPetriNet]: 50 programPoint places, 53 predicate places. [2022-12-05 20:50:49,831 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 840 flow [2022-12-05 20:50:49,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:50:49,832 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:50:49,832 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:50:49,839 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 20:50:50,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:50,036 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 4 more)] === [2022-12-05 20:50:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:50:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2084133195, now seen corresponding path program 1 times [2022-12-05 20:50:50,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:50:50,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736396279] [2022-12-05 20:50:50,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:50,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:50:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 20:50:50,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:50:50,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736396279] [2022-12-05 20:50:50,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736396279] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:50:50,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979707553] [2022-12-05 20:50:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:50:50,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:50:50,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:50:50,453 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 20:50:50,455 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 20:50:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:50:52,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-05 20:50:52,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:51:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 20:51:24,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:51:50,424 WARN L233 SmtUtils]: Spent 16.35s on a formula simplification. DAG size of input: 4144 DAG size of output: 4101 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)