/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 19:17:02,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 19:17:02,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 19:17:02,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 19:17:02,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 19:17:02,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 19:17:02,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 19:17:02,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 19:17:02,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 19:17:02,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 19:17:02,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 19:17:02,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 19:17:02,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 19:17:02,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 19:17:02,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 19:17:02,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 19:17:02,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 19:17:02,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 19:17:02,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 19:17:02,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 19:17:02,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 19:17:02,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 19:17:02,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 19:17:02,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 19:17:02,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 19:17:02,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 19:17:02,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 19:17:02,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 19:17:02,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 19:17:02,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 19:17:02,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 19:17:02,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 19:17:02,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 19:17:02,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 19:17:02,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 19:17:02,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 19:17:02,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 19:17:02,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 19:17:02,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 19:17:02,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 19:17:02,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 19:17:02,721 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-12-05 19:17:02,743 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 19:17:02,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 19:17:02,745 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 19:17:02,745 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 19:17:02,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 19:17:02,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 19:17:02,746 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 19:17:02,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 19:17:02,747 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 19:17:02,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 19:17:02,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 19:17:02,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 19:17:02,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 19:17:02,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 19:17:02,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 19:17:02,748 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 19:17:02,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 19:17:02,748 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 19:17:02,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 19:17:02,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 19:17:02,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 19:17:02,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 19:17:02,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 19:17:02,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 19:17:02,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 19:17:02,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 19:17:02,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 19:17:02,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 19:17:02,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 19:17:02,750 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-05 19:17:02,750 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 19:17:02,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 19:17:03,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 19:17:03,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 19:17:03,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 19:17:03,025 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 19:17:03,025 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 19:17:03,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2022-12-05 19:17:03,988 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 19:17:04,156 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 19:17:04,156 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2022-12-05 19:17:04,170 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92bee89d0/af76a13fafaf43e88d662490c03cc81a/FLAG3cacb0704 [2022-12-05 19:17:04,179 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92bee89d0/af76a13fafaf43e88d662490c03cc81a [2022-12-05 19:17:04,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 19:17:04,182 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 19:17:04,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 19:17:04,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 19:17:04,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 19:17:04,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 07:17:04" (1/1) ... [2022-12-05 19:17:04,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30ecfd68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:17:04, skipping insertion in model container [2022-12-05 19:17:04,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 07:17:04" (1/1) ... [2022-12-05 19:17:04,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 19:17:04,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 19:17:04,289 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:17:04,290 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:17:04,292 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:17:04,293 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:17:04,297 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2121,2134] [2022-12-05 19:17:04,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 19:17:04,305 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 19:17:04,314 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:17:04,314 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:17:04,315 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:17:04,315 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:17:04,318 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2121,2134] [2022-12-05 19:17:04,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 19:17:04,328 INFO L208 MainTranslator]: Completed translation [2022-12-05 19:17:04,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:17:04 WrapperNode [2022-12-05 19:17:04,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 19:17:04,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 19:17:04,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 19:17:04,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 19:17:04,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:17:04" (1/1) ... [2022-12-05 19:17:04,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:17:04" (1/1) ... [2022-12-05 19:17:04,359 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-12-05 19:17:04,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 19:17:04,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 19:17:04,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 19:17:04,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 19:17:04,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:17:04" (1/1) ... [2022-12-05 19:17:04,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:17:04" (1/1) ... [2022-12-05 19:17:04,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:17:04" (1/1) ... [2022-12-05 19:17:04,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:17:04" (1/1) ... [2022-12-05 19:17:04,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:17:04" (1/1) ... [2022-12-05 19:17:04,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:17:04" (1/1) ... [2022-12-05 19:17:04,386 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:17:04" (1/1) ... [2022-12-05 19:17:04,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:17:04" (1/1) ... [2022-12-05 19:17:04,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 19:17:04,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 19:17:04,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 19:17:04,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 19:17:04,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:17:04" (1/1) ... [2022-12-05 19:17:04,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 19:17:04,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:17:04,441 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 19:17:04,480 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 19:17:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 19:17:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 19:17:04,501 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 19:17:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 19:17:04,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 19:17:04,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 19:17:04,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 19:17:04,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 19:17:04,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 19:17:04,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 19:17:04,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 19:17:04,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 19:17:04,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 19:17:04,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 19:17:04,504 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 19:17:04,586 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 19:17:04,588 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 19:17:04,692 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 19:17:04,709 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 19:17:04,709 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-05 19:17:04,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 07:17:04 BoogieIcfgContainer [2022-12-05 19:17:04,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 19:17:04,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 19:17:04,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 19:17:04,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 19:17:04,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 07:17:04" (1/3) ... [2022-12-05 19:17:04,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58701e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 07:17:04, skipping insertion in model container [2022-12-05 19:17:04,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:17:04" (2/3) ... [2022-12-05 19:17:04,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58701e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 07:17:04, skipping insertion in model container [2022-12-05 19:17:04,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 07:17:04" (3/3) ... [2022-12-05 19:17:04,716 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-12-05 19:17:04,727 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 19:17:04,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 19:17:04,727 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 19:17:04,788 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 19:17:04,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 176 flow [2022-12-05 19:17:04,887 INFO L130 PetriNetUnfolder]: 6/78 cut-off events. [2022-12-05 19:17:04,887 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 19:17:04,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 6/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2022-12-05 19:17:04,895 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 80 transitions, 176 flow [2022-12-05 19:17:04,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 70 transitions, 152 flow [2022-12-05 19:17:04,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 19:17:04,909 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;@e2eca7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 19:17:04,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 19:17:04,925 INFO L130 PetriNetUnfolder]: 6/69 cut-off events. [2022-12-05 19:17:04,925 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 19:17:04,925 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:04,926 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:17:04,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:04,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:04,930 INFO L85 PathProgramCache]: Analyzing trace with hash 478861800, now seen corresponding path program 1 times [2022-12-05 19:17:04,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:04,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194408532] [2022-12-05 19:17:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:04,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:05,450 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 19:17:05,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:05,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194408532] [2022-12-05 19:17:05,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194408532] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:17:05,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:17:05,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 19:17:05,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398647955] [2022-12-05 19:17:05,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:17:05,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 19:17:05,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:05,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 19:17:05,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-05 19:17:05,481 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 80 [2022-12-05 19:17:05,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 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 19:17:05,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:05,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 80 [2022-12-05 19:17:05,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:17:05,581 INFO L130 PetriNetUnfolder]: 8/107 cut-off events. [2022-12-05 19:17:05,582 INFO L131 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-12-05 19:17:05,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 107 events. 8/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 179 event pairs, 1 based on Foata normal form. 17/114 useless extension candidates. Maximal degree in co-relation 61. Up to 19 conditions per place. [2022-12-05 19:17:05,583 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 15 selfloop transitions, 2 changer transitions 8/74 dead transitions. [2022-12-05 19:17:05,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 74 transitions, 219 flow [2022-12-05 19:17:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 19:17:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 19:17:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 440 transitions. [2022-12-05 19:17:05,595 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-12-05 19:17:05,596 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 152 flow. Second operand 7 states and 440 transitions. [2022-12-05 19:17:05,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 74 transitions, 219 flow [2022-12-05 19:17:05,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 74 transitions, 205 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 19:17:05,605 INFO L231 Difference]: Finished difference. Result has 76 places, 65 transitions, 150 flow [2022-12-05 19:17:05,607 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=76, PETRI_TRANSITIONS=65} [2022-12-05 19:17:05,610 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2022-12-05 19:17:05,610 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 65 transitions, 150 flow [2022-12-05 19:17:05,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 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 19:17:05,610 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:05,610 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, 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 19:17:05,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 19:17:05,611 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1450771332, now seen corresponding path program 1 times [2022-12-05 19:17:05,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:05,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623062740] [2022-12-05 19:17:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:05,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:05,762 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 19:17:05,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:05,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623062740] [2022-12-05 19:17:05,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623062740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:17:05,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:17:05,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 19:17:05,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804222942] [2022-12-05 19:17:05,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:17:05,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 19:17:05,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:05,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 19:17:05,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 19:17:05,769 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 80 [2022-12-05 19:17:05,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 65 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 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 19:17:05,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:05,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 80 [2022-12-05 19:17:05,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:17:05,935 INFO L130 PetriNetUnfolder]: 76/284 cut-off events. [2022-12-05 19:17:05,939 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-05 19:17:05,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 284 events. 76/284 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1256 event pairs, 31 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 483. Up to 89 conditions per place. [2022-12-05 19:17:05,943 INFO L137 encePairwiseOnDemand]: 73/80 looper letters, 28 selfloop transitions, 5 changer transitions 4/85 dead transitions. [2022-12-05 19:17:05,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 85 transitions, 271 flow [2022-12-05 19:17:05,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 19:17:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 19:17:05,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 387 transitions. [2022-12-05 19:17:05,952 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.80625 [2022-12-05 19:17:05,952 INFO L175 Difference]: Start difference. First operand has 76 places, 65 transitions, 150 flow. Second operand 6 states and 387 transitions. [2022-12-05 19:17:05,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 85 transitions, 271 flow [2022-12-05 19:17:05,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 85 transitions, 265 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-05 19:17:05,955 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 172 flow [2022-12-05 19:17:05,956 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2022-12-05 19:17:05,956 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-12-05 19:17:05,956 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 172 flow [2022-12-05 19:17:05,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 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 19:17:05,957 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:05,957 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, 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 19:17:05,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 19:17:05,958 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:05,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:05,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1358946008, now seen corresponding path program 2 times [2022-12-05 19:17:05,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:05,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332920578] [2022-12-05 19:17:05,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:05,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:06,192 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 19:17:06,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:06,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332920578] [2022-12-05 19:17:06,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332920578] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:17:06,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021743132] [2022-12-05 19:17:06,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:17:06,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:06,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:17:06,206 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 19:17:06,207 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 19:17:06,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:17:06,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:17:06,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 19:17:06,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:17:06,463 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 19:17:06,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:17:06,531 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 19:17:06,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021743132] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 19:17:06,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 19:17:06,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-12-05 19:17:06,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161599292] [2022-12-05 19:17:06,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:17:06,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 19:17:06,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:06,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 19:17:06,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-05 19:17:06,534 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 80 [2022-12-05 19:17:06,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 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 19:17:06,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:06,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 80 [2022-12-05 19:17:06,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:17:06,602 INFO L130 PetriNetUnfolder]: 52/231 cut-off events. [2022-12-05 19:17:06,602 INFO L131 PetriNetUnfolder]: For 98/102 co-relation queries the response was YES. [2022-12-05 19:17:06,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 231 events. 52/231 cut-off events. For 98/102 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1029 event pairs, 19 based on Foata normal form. 4/229 useless extension candidates. Maximal degree in co-relation 170. Up to 59 conditions per place. [2022-12-05 19:17:06,607 INFO L137 encePairwiseOnDemand]: 75/80 looper letters, 18 selfloop transitions, 6 changer transitions 4/79 dead transitions. [2022-12-05 19:17:06,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 79 transitions, 271 flow [2022-12-05 19:17:06,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 19:17:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 19:17:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 271 transitions. [2022-12-05 19:17:06,609 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.846875 [2022-12-05 19:17:06,609 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 172 flow. Second operand 4 states and 271 transitions. [2022-12-05 19:17:06,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 79 transitions, 271 flow [2022-12-05 19:17:06,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 258 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-05 19:17:06,613 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 208 flow [2022-12-05 19:17:06,613 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2022-12-05 19:17:06,614 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 6 predicate places. [2022-12-05 19:17:06,615 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 208 flow [2022-12-05 19:17:06,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 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 19:17:06,615 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:06,615 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, 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 19:17:06,624 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 19:17:06,822 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 19:17:06,822 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:06,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:06,823 INFO L85 PathProgramCache]: Analyzing trace with hash 223231522, now seen corresponding path program 3 times [2022-12-05 19:17:06,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:06,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492835443] [2022-12-05 19:17:06,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:06,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:06,952 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 19:17:06,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:06,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492835443] [2022-12-05 19:17:06,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492835443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:17:06,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531417594] [2022-12-05 19:17:06,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 19:17:06,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:06,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:17:06,976 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 19:17:07,029 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 19:17:07,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 19:17:07,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:17:07,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 19:17:07,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:17:07,164 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 19:17:07,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:17:07,231 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 19:17:07,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531417594] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:17:07,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:17:07,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-12-05 19:17:07,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560225677] [2022-12-05 19:17:07,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:17:07,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 19:17:07,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:07,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 19:17:07,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-05 19:17:07,235 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 80 [2022-12-05 19:17:07,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 208 flow. Second operand has 8 states, 8 states have (on average 61.0) internal successors, (488), 8 states have internal predecessors, (488), 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 19:17:07,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:07,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 80 [2022-12-05 19:17:07,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:17:07,396 INFO L130 PetriNetUnfolder]: 168/522 cut-off events. [2022-12-05 19:17:07,397 INFO L131 PetriNetUnfolder]: For 449/458 co-relation queries the response was YES. [2022-12-05 19:17:07,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 522 events. 168/522 cut-off events. For 449/458 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2903 event pairs, 14 based on Foata normal form. 9/522 useless extension candidates. Maximal degree in co-relation 646. Up to 83 conditions per place. [2022-12-05 19:17:07,400 INFO L137 encePairwiseOnDemand]: 72/80 looper letters, 52 selfloop transitions, 32 changer transitions 10/142 dead transitions. [2022-12-05 19:17:07,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 142 transitions, 685 flow [2022-12-05 19:17:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 19:17:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 19:17:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 667 transitions. [2022-12-05 19:17:07,401 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.83375 [2022-12-05 19:17:07,401 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 208 flow. Second operand 10 states and 667 transitions. [2022-12-05 19:17:07,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 142 transitions, 685 flow [2022-12-05 19:17:07,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 142 transitions, 685 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 19:17:07,405 INFO L231 Difference]: Finished difference. Result has 94 places, 100 transitions, 498 flow [2022-12-05 19:17:07,405 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=498, PETRI_PLACES=94, PETRI_TRANSITIONS=100} [2022-12-05 19:17:07,406 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 23 predicate places. [2022-12-05 19:17:07,406 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 100 transitions, 498 flow [2022-12-05 19:17:07,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 61.0) internal successors, (488), 8 states have internal predecessors, (488), 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 19:17:07,406 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:07,406 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, 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 19:17:07,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-05 19:17:07,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-05 19:17:07,611 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:07,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1208653936, now seen corresponding path program 4 times [2022-12-05 19:17:07,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:07,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837975195] [2022-12-05 19:17:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:07,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:07,707 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 19:17:07,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:07,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837975195] [2022-12-05 19:17:07,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837975195] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:17:07,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:17:07,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-05 19:17:07,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726711389] [2022-12-05 19:17:07,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:17:07,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 19:17:07,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:07,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 19:17:07,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-05 19:17:07,709 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 80 [2022-12-05 19:17:07,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 100 transitions, 498 flow. Second operand has 6 states, 6 states have (on average 60.166666666666664) internal successors, (361), 6 states have internal predecessors, (361), 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 19:17:07,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:07,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 80 [2022-12-05 19:17:07,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:17:07,805 INFO L130 PetriNetUnfolder]: 166/503 cut-off events. [2022-12-05 19:17:07,805 INFO L131 PetriNetUnfolder]: For 1214/1218 co-relation queries the response was YES. [2022-12-05 19:17:07,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1565 conditions, 503 events. 166/503 cut-off events. For 1214/1218 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2709 event pairs, 56 based on Foata normal form. 8/501 useless extension candidates. Maximal degree in co-relation 1268. Up to 160 conditions per place. [2022-12-05 19:17:07,808 INFO L137 encePairwiseOnDemand]: 73/80 looper letters, 51 selfloop transitions, 23 changer transitions 7/129 dead transitions. [2022-12-05 19:17:07,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 129 transitions, 819 flow [2022-12-05 19:17:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 19:17:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 19:17:07,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 400 transitions. [2022-12-05 19:17:07,809 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-12-05 19:17:07,810 INFO L175 Difference]: Start difference. First operand has 94 places, 100 transitions, 498 flow. Second operand 6 states and 400 transitions. [2022-12-05 19:17:07,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 129 transitions, 819 flow [2022-12-05 19:17:07,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 129 transitions, 815 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-12-05 19:17:07,815 INFO L231 Difference]: Finished difference. Result has 102 places, 104 transitions, 598 flow [2022-12-05 19:17:07,815 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=598, PETRI_PLACES=102, PETRI_TRANSITIONS=104} [2022-12-05 19:17:07,815 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 31 predicate places. [2022-12-05 19:17:07,815 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 104 transitions, 598 flow [2022-12-05 19:17:07,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.166666666666664) internal successors, (361), 6 states have internal predecessors, (361), 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 19:17:07,816 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:07,816 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, 1, 1, 1, 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 19:17:07,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-05 19:17:07,816 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:07,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2002136316, now seen corresponding path program 1 times [2022-12-05 19:17:07,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:07,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689472040] [2022-12-05 19:17:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:07,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:07,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:07,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689472040] [2022-12-05 19:17:07,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689472040] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:17:07,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821093725] [2022-12-05 19:17:07,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:07,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:07,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:17:07,948 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 19:17:07,963 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 19:17:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:08,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-05 19:17:08,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:17:08,068 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 19:17:08,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:17:08,143 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 19:17:08,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821093725] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:17:08,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:17:08,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-12-05 19:17:08,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630777963] [2022-12-05 19:17:08,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:17:08,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 19:17:08,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:08,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 19:17:08,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-05 19:17:08,145 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:17:08,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 104 transitions, 598 flow. Second operand has 9 states, 9 states have (on average 59.888888888888886) internal successors, (539), 9 states have internal predecessors, (539), 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 19:17:08,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:08,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:17:08,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:17:08,247 INFO L130 PetriNetUnfolder]: 89/520 cut-off events. [2022-12-05 19:17:08,247 INFO L131 PetriNetUnfolder]: For 1136/1158 co-relation queries the response was YES. [2022-12-05 19:17:08,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1380 conditions, 520 events. 89/520 cut-off events. For 1136/1158 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3175 event pairs, 8 based on Foata normal form. 16/527 useless extension candidates. Maximal degree in co-relation 1192. Up to 68 conditions per place. [2022-12-05 19:17:08,251 INFO L137 encePairwiseOnDemand]: 72/80 looper letters, 23 selfloop transitions, 7 changer transitions 4/119 dead transitions. [2022-12-05 19:17:08,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 119 transitions, 702 flow [2022-12-05 19:17:08,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 19:17:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 19:17:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 427 transitions. [2022-12-05 19:17:08,252 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7625 [2022-12-05 19:17:08,252 INFO L175 Difference]: Start difference. First operand has 102 places, 104 transitions, 598 flow. Second operand 7 states and 427 transitions. [2022-12-05 19:17:08,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 119 transitions, 702 flow [2022-12-05 19:17:08,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 119 transitions, 639 flow, removed 14 selfloop flow, removed 5 redundant places. [2022-12-05 19:17:08,258 INFO L231 Difference]: Finished difference. Result has 106 places, 106 transitions, 575 flow [2022-12-05 19:17:08,258 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=575, PETRI_PLACES=106, PETRI_TRANSITIONS=106} [2022-12-05 19:17:08,260 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 35 predicate places. [2022-12-05 19:17:08,260 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 106 transitions, 575 flow [2022-12-05 19:17:08,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 59.888888888888886) internal successors, (539), 9 states have internal predecessors, (539), 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 19:17:08,261 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:08,261 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:08,273 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 19:17:08,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:08,465 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash 975564144, now seen corresponding path program 2 times [2022-12-05 19:17:08,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:08,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355654697] [2022-12-05 19:17:08,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:08,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:08,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:08,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355654697] [2022-12-05 19:17:08,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355654697] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:17:08,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817970318] [2022-12-05 19:17:08,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:17:08,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:08,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:17:08,641 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 19:17:08,655 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 19:17:08,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:17:08,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:17:08,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 19:17:08,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:17:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:08,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:17:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:08,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817970318] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:17:08,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:17:08,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-05 19:17:08,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874770296] [2022-12-05 19:17:08,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:17:08,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 19:17:08,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:08,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 19:17:08,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-12-05 19:17:08,933 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:17:08,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 106 transitions, 575 flow. Second operand has 19 states, 19 states have (on average 58.78947368421053) internal successors, (1117), 19 states have internal predecessors, (1117), 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 19:17:08,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:08,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:17:08,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:17:10,963 INFO L130 PetriNetUnfolder]: 815/2287 cut-off events. [2022-12-05 19:17:10,963 INFO L131 PetriNetUnfolder]: For 4911/4917 co-relation queries the response was YES. [2022-12-05 19:17:10,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7067 conditions, 2287 events. 815/2287 cut-off events. For 4911/4917 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 17274 event pairs, 54 based on Foata normal form. 29/2307 useless extension candidates. Maximal degree in co-relation 7014. Up to 252 conditions per place. [2022-12-05 19:17:10,978 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 181 selfloop transitions, 201 changer transitions 24/454 dead transitions. [2022-12-05 19:17:10,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 454 transitions, 3454 flow [2022-12-05 19:17:10,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-05 19:17:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-12-05 19:17:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4379 transitions. [2022-12-05 19:17:10,985 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7602430555555556 [2022-12-05 19:17:10,985 INFO L175 Difference]: Start difference. First operand has 106 places, 106 transitions, 575 flow. Second operand 72 states and 4379 transitions. [2022-12-05 19:17:10,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 454 transitions, 3454 flow [2022-12-05 19:17:10,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 454 transitions, 3386 flow, removed 33 selfloop flow, removed 3 redundant places. [2022-12-05 19:17:10,998 INFO L231 Difference]: Finished difference. Result has 205 places, 287 transitions, 2444 flow [2022-12-05 19:17:10,998 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=2444, PETRI_PLACES=205, PETRI_TRANSITIONS=287} [2022-12-05 19:17:10,999 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 134 predicate places. [2022-12-05 19:17:10,999 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 287 transitions, 2444 flow [2022-12-05 19:17:11,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.78947368421053) internal successors, (1117), 19 states have internal predecessors, (1117), 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 19:17:11,000 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:11,000 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:11,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-05 19:17:11,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:11,204 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:11,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1011526344, now seen corresponding path program 3 times [2022-12-05 19:17:11,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:11,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034070018] [2022-12-05 19:17:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:11,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:11,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:11,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034070018] [2022-12-05 19:17:11,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034070018] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:17:11,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712923789] [2022-12-05 19:17:11,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 19:17:11,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:11,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:17:11,408 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 19:17:11,443 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 19:17:11,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 19:17:11,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:17:11,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 19:17:11,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:17:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:11,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:17:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:11,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712923789] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:17:11,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:17:11,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-05 19:17:11,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143681800] [2022-12-05 19:17:11,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:17:11,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 19:17:11,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:11,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 19:17:11,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-12-05 19:17:11,722 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:17:11,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 287 transitions, 2444 flow. Second operand has 16 states, 16 states have (on average 58.5) internal successors, (936), 16 states have internal predecessors, (936), 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 19:17:11,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:11,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:17:11,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:17:13,227 INFO L130 PetriNetUnfolder]: 1147/3008 cut-off events. [2022-12-05 19:17:13,227 INFO L131 PetriNetUnfolder]: For 29124/29142 co-relation queries the response was YES. [2022-12-05 19:17:13,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15159 conditions, 3008 events. 1147/3008 cut-off events. For 29124/29142 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 23801 event pairs, 57 based on Foata normal form. 36/3021 useless extension candidates. Maximal degree in co-relation 13835. Up to 359 conditions per place. [2022-12-05 19:17:13,254 INFO L137 encePairwiseOnDemand]: 69/80 looper letters, 174 selfloop transitions, 425 changer transitions 11/658 dead transitions. [2022-12-05 19:17:13,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 658 transitions, 7554 flow [2022-12-05 19:17:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-05 19:17:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-05 19:17:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2847 transitions. [2022-12-05 19:17:13,259 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7571808510638298 [2022-12-05 19:17:13,259 INFO L175 Difference]: Start difference. First operand has 205 places, 287 transitions, 2444 flow. Second operand 47 states and 2847 transitions. [2022-12-05 19:17:13,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 658 transitions, 7554 flow [2022-12-05 19:17:13,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 658 transitions, 7167 flow, removed 143 selfloop flow, removed 5 redundant places. [2022-12-05 19:17:13,351 INFO L231 Difference]: Finished difference. Result has 272 places, 537 transitions, 6112 flow [2022-12-05 19:17:13,352 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=6112, PETRI_PLACES=272, PETRI_TRANSITIONS=537} [2022-12-05 19:17:13,352 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 201 predicate places. [2022-12-05 19:17:13,352 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 537 transitions, 6112 flow [2022-12-05 19:17:13,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 58.5) internal successors, (936), 16 states have internal predecessors, (936), 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 19:17:13,353 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:13,353 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:13,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-05 19:17:13,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:13,558 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:13,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:13,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2078894376, now seen corresponding path program 4 times [2022-12-05 19:17:13,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:13,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239920329] [2022-12-05 19:17:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:13,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:13,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:13,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239920329] [2022-12-05 19:17:13,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239920329] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:17:13,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277387123] [2022-12-05 19:17:13,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 19:17:13,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:13,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:17:13,758 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 19:17:13,760 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 19:17:13,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 19:17:13,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:17:13,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 19:17:13,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:17:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:13,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:17:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:13,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277387123] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:17:13,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:17:13,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-05 19:17:13,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227997004] [2022-12-05 19:17:13,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:17:13,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 19:17:13,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:13,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 19:17:13,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-12-05 19:17:13,972 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:17:13,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 537 transitions, 6112 flow. Second operand has 17 states, 17 states have (on average 58.411764705882355) internal successors, (993), 17 states have internal predecessors, (993), 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 19:17:13,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:13,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:17:13,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:17:15,030 INFO L130 PetriNetUnfolder]: 1181/3269 cut-off events. [2022-12-05 19:17:15,030 INFO L131 PetriNetUnfolder]: For 58032/58044 co-relation queries the response was YES. [2022-12-05 19:17:15,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19488 conditions, 3269 events. 1181/3269 cut-off events. For 58032/58044 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 27079 event pairs, 117 based on Foata normal form. 10/3255 useless extension candidates. Maximal degree in co-relation 17994. Up to 776 conditions per place. [2022-12-05 19:17:15,061 INFO L137 encePairwiseOnDemand]: 66/80 looper letters, 380 selfloop transitions, 222 changer transitions 30/680 dead transitions. [2022-12-05 19:17:15,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 680 transitions, 9378 flow [2022-12-05 19:17:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 19:17:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 19:17:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1340 transitions. [2022-12-05 19:17:15,063 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7613636363636364 [2022-12-05 19:17:15,063 INFO L175 Difference]: Start difference. First operand has 272 places, 537 transitions, 6112 flow. Second operand 22 states and 1340 transitions. [2022-12-05 19:17:15,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 680 transitions, 9378 flow [2022-12-05 19:17:15,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 680 transitions, 8497 flow, removed 275 selfloop flow, removed 6 redundant places. [2022-12-05 19:17:15,256 INFO L231 Difference]: Finished difference. Result has 297 places, 574 transitions, 6516 flow [2022-12-05 19:17:15,256 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=5465, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6516, PETRI_PLACES=297, PETRI_TRANSITIONS=574} [2022-12-05 19:17:15,257 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 226 predicate places. [2022-12-05 19:17:15,257 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 574 transitions, 6516 flow [2022-12-05 19:17:15,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 58.411764705882355) internal successors, (993), 17 states have internal predecessors, (993), 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 19:17:15,257 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:15,258 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:15,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-05 19:17:15,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:15,458 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:15,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:15,459 INFO L85 PathProgramCache]: Analyzing trace with hash 388136438, now seen corresponding path program 5 times [2022-12-05 19:17:15,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:15,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839700585] [2022-12-05 19:17:15,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:15,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:15,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:15,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839700585] [2022-12-05 19:17:15,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839700585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:17:15,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823575901] [2022-12-05 19:17:15,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 19:17:15,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:15,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:17:15,684 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 19:17:15,692 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 19:17:15,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:17:15,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:17:15,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-05 19:17:15,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:17:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:15,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:17:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:16,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823575901] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:17:16,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:17:16,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-05 19:17:16,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55854292] [2022-12-05 19:17:16,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:17:16,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-05 19:17:16,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:16,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-05 19:17:16,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-12-05 19:17:16,166 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:17:16,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 574 transitions, 6516 flow. Second operand has 23 states, 23 states have (on average 58.391304347826086) internal successors, (1343), 23 states have internal predecessors, (1343), 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 19:17:16,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:16,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:17:16,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:17:19,714 INFO L130 PetriNetUnfolder]: 1706/4880 cut-off events. [2022-12-05 19:17:19,715 INFO L131 PetriNetUnfolder]: For 108015/108028 co-relation queries the response was YES. [2022-12-05 19:17:19,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30150 conditions, 4880 events. 1706/4880 cut-off events. For 108015/108028 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 45342 event pairs, 55 based on Foata normal form. 43/4908 useless extension candidates. Maximal degree in co-relation 30051. Up to 507 conditions per place. [2022-12-05 19:17:19,775 INFO L137 encePairwiseOnDemand]: 65/80 looper letters, 252 selfloop transitions, 681 changer transitions 25/1006 dead transitions. [2022-12-05 19:17:19,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1006 transitions, 14515 flow [2022-12-05 19:17:19,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-12-05 19:17:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-12-05 19:17:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 4914 transitions. [2022-12-05 19:17:19,787 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7490853658536586 [2022-12-05 19:17:19,787 INFO L175 Difference]: Start difference. First operand has 297 places, 574 transitions, 6516 flow. Second operand 82 states and 4914 transitions. [2022-12-05 19:17:19,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1006 transitions, 14515 flow [2022-12-05 19:17:20,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1006 transitions, 14159 flow, removed 142 selfloop flow, removed 7 redundant places. [2022-12-05 19:17:20,116 INFO L231 Difference]: Finished difference. Result has 396 places, 832 transitions, 12219 flow [2022-12-05 19:17:20,117 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=6341, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=12219, PETRI_PLACES=396, PETRI_TRANSITIONS=832} [2022-12-05 19:17:20,118 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 325 predicate places. [2022-12-05 19:17:20,118 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 832 transitions, 12219 flow [2022-12-05 19:17:20,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 58.391304347826086) internal successors, (1343), 23 states have internal predecessors, (1343), 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 19:17:20,118 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:20,119 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:20,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-05 19:17:20,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:20,323 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:20,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:20,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1680884912, now seen corresponding path program 6 times [2022-12-05 19:17:20,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:20,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690135869] [2022-12-05 19:17:20,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:20,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:20,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:20,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690135869] [2022-12-05 19:17:20,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690135869] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:17:20,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590222151] [2022-12-05 19:17:20,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 19:17:20,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:20,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:17:20,493 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 19:17:20,495 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 19:17:20,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 19:17:20,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:17:20,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 19:17:20,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:17:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:20,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:17:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:20,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590222151] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:17:20,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:17:20,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-05 19:17:20,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498968413] [2022-12-05 19:17:20,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:17:20,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 19:17:20,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:20,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 19:17:20,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-12-05 19:17:20,790 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:17:20,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 832 transitions, 12219 flow. Second operand has 18 states, 18 states have (on average 58.666666666666664) internal successors, (1056), 18 states have internal predecessors, (1056), 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 19:17:20,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:20,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:17:20,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:17:23,703 INFO L130 PetriNetUnfolder]: 2165/6015 cut-off events. [2022-12-05 19:17:23,704 INFO L131 PetriNetUnfolder]: For 213453/213470 co-relation queries the response was YES. [2022-12-05 19:17:23,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45118 conditions, 6015 events. 2165/6015 cut-off events. For 213453/213470 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 58055 event pairs, 113 based on Foata normal form. 29/5977 useless extension candidates. Maximal degree in co-relation 43632. Up to 712 conditions per place. [2022-12-05 19:17:23,775 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 313 selfloop transitions, 897 changer transitions 32/1290 dead transitions. [2022-12-05 19:17:23,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1290 transitions, 22277 flow [2022-12-05 19:17:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-05 19:17:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-12-05 19:17:23,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3801 transitions. [2022-12-05 19:17:23,779 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7541666666666667 [2022-12-05 19:17:23,779 INFO L175 Difference]: Start difference. First operand has 396 places, 832 transitions, 12219 flow. Second operand 63 states and 3801 transitions. [2022-12-05 19:17:23,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1290 transitions, 22277 flow [2022-12-05 19:17:25,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 1290 transitions, 19796 flow, removed 1011 selfloop flow, removed 11 redundant places. [2022-12-05 19:17:25,070 INFO L231 Difference]: Finished difference. Result has 473 places, 1134 transitions, 18035 flow [2022-12-05 19:17:25,071 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=10818, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=18035, PETRI_PLACES=473, PETRI_TRANSITIONS=1134} [2022-12-05 19:17:25,071 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 402 predicate places. [2022-12-05 19:17:25,071 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 1134 transitions, 18035 flow [2022-12-05 19:17:25,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.666666666666664) internal successors, (1056), 18 states have internal predecessors, (1056), 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 19:17:25,072 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:25,072 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:25,078 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 19:17:25,276 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,SelfDestructingSolverStorable10 [2022-12-05 19:17:25,277 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:25,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:25,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1717208036, now seen corresponding path program 7 times [2022-12-05 19:17:25,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:25,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158782258] [2022-12-05 19:17:25,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:25,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:25,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:25,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158782258] [2022-12-05 19:17:25,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158782258] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:17:25,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994519857] [2022-12-05 19:17:25,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 19:17:25,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:25,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:17:25,527 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 19:17:25,529 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 19:17:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:25,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 19:17:25,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:17:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:25,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:17:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:25,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994519857] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:17:25,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:17:25,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-05 19:17:25,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629898526] [2022-12-05 19:17:25,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:17:25,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 19:17:25,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:25,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 19:17:25,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-12-05 19:17:25,820 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:17:25,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 1134 transitions, 18035 flow. Second operand has 19 states, 19 states have (on average 58.73684210526316) internal successors, (1116), 19 states have internal predecessors, (1116), 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 19:17:25,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:25,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:17:25,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:17:29,330 INFO L130 PetriNetUnfolder]: 2539/7090 cut-off events. [2022-12-05 19:17:29,330 INFO L131 PetriNetUnfolder]: For 215866/215880 co-relation queries the response was YES. [2022-12-05 19:17:29,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51615 conditions, 7090 events. 2539/7090 cut-off events. For 215866/215880 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 71386 event pairs, 91 based on Foata normal form. 25/7067 useless extension candidates. Maximal degree in co-relation 51072. Up to 876 conditions per place. [2022-12-05 19:17:29,489 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 281 selfloop transitions, 1181 changer transitions 27/1537 dead transitions. [2022-12-05 19:17:29,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1537 transitions, 27537 flow [2022-12-05 19:17:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-12-05 19:17:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-12-05 19:17:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 4718 transitions. [2022-12-05 19:17:29,508 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7465189873417721 [2022-12-05 19:17:29,508 INFO L175 Difference]: Start difference. First operand has 473 places, 1134 transitions, 18035 flow. Second operand 79 states and 4718 transitions. [2022-12-05 19:17:29,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 1537 transitions, 27537 flow [2022-12-05 19:17:31,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1537 transitions, 26792 flow, removed 149 selfloop flow, removed 16 redundant places. [2022-12-05 19:17:31,065 INFO L231 Difference]: Finished difference. Result has 552 places, 1402 transitions, 25334 flow [2022-12-05 19:17:31,066 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=17532, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=922, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=25334, PETRI_PLACES=552, PETRI_TRANSITIONS=1402} [2022-12-05 19:17:31,066 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 481 predicate places. [2022-12-05 19:17:31,066 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 1402 transitions, 25334 flow [2022-12-05 19:17:31,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.73684210526316) internal successors, (1116), 19 states have internal predecessors, (1116), 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 19:17:31,067 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:31,067 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:31,075 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 19:17:31,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:31,272 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:31,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash 829798676, now seen corresponding path program 8 times [2022-12-05 19:17:31,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:31,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983065527] [2022-12-05 19:17:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:31,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:31,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:31,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983065527] [2022-12-05 19:17:31,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983065527] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:17:31,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672083979] [2022-12-05 19:17:31,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:17:31,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:31,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:17:31,415 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 19:17:31,418 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 19:17:31,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:17:31,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:17:31,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 19:17:31,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:17:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:31,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:17:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:31,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672083979] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:17:31,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:17:31,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-05 19:17:31,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616389699] [2022-12-05 19:17:31,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:17:31,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 19:17:31,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:31,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 19:17:31,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-12-05 19:17:31,632 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:17:31,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 1402 transitions, 25334 flow. Second operand has 19 states, 19 states have (on average 58.36842105263158) internal successors, (1109), 19 states have internal predecessors, (1109), 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 19:17:31,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:31,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:17:31,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:17:35,650 INFO L130 PetriNetUnfolder]: 2910/8075 cut-off events. [2022-12-05 19:17:35,650 INFO L131 PetriNetUnfolder]: For 245342/245360 co-relation queries the response was YES. [2022-12-05 19:17:35,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62802 conditions, 8075 events. 2910/8075 cut-off events. For 245342/245360 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 83567 event pairs, 101 based on Foata normal form. 13/8001 useless extension candidates. Maximal degree in co-relation 62587. Up to 820 conditions per place. [2022-12-05 19:17:35,746 INFO L137 encePairwiseOnDemand]: 66/80 looper letters, 547 selfloop transitions, 1260 changer transitions 44/1899 dead transitions. [2022-12-05 19:17:35,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1899 transitions, 38654 flow [2022-12-05 19:17:35,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-05 19:17:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-12-05 19:17:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3985 transitions. [2022-12-05 19:17:35,750 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7547348484848485 [2022-12-05 19:17:35,750 INFO L175 Difference]: Start difference. First operand has 552 places, 1402 transitions, 25334 flow. Second operand 66 states and 3985 transitions. [2022-12-05 19:17:35,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1899 transitions, 38654 flow [2022-12-05 19:17:37,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 1899 transitions, 37903 flow, removed 234 selfloop flow, removed 21 redundant places. [2022-12-05 19:17:37,939 INFO L231 Difference]: Finished difference. Result has 605 places, 1708 transitions, 34391 flow [2022-12-05 19:17:37,940 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=24638, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=949, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=34391, PETRI_PLACES=605, PETRI_TRANSITIONS=1708} [2022-12-05 19:17:37,941 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 534 predicate places. [2022-12-05 19:17:37,941 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 1708 transitions, 34391 flow [2022-12-05 19:17:37,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.36842105263158) internal successors, (1109), 19 states have internal predecessors, (1109), 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 19:17:37,941 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:37,941 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:37,947 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 19:17:38,145 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,SelfDestructingSolverStorable12 [2022-12-05 19:17:38,145 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1694738666, now seen corresponding path program 9 times [2022-12-05 19:17:38,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:38,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878827119] [2022-12-05 19:17:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:38,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:38,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:38,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878827119] [2022-12-05 19:17:38,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878827119] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:17:38,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39410553] [2022-12-05 19:17:38,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 19:17:38,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:38,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:17:38,294 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 19:17:38,315 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 19:17:38,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-05 19:17:38,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:17:38,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 19:17:38,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:17:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:38,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:17:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:38,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39410553] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:17:38,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:17:38,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-05 19:17:38,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733375587] [2022-12-05 19:17:38,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:17:38,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 19:17:38,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:38,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 19:17:38,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-12-05 19:17:38,516 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:17:38,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 1708 transitions, 34391 flow. Second operand has 18 states, 18 states have (on average 58.27777777777778) internal successors, (1049), 18 states have internal predecessors, (1049), 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 19:17:38,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:38,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:17:38,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:17:45,573 INFO L130 PetriNetUnfolder]: 4288/11776 cut-off events. [2022-12-05 19:17:45,573 INFO L131 PetriNetUnfolder]: For 385751/385778 co-relation queries the response was YES. [2022-12-05 19:17:45,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97668 conditions, 11776 events. 4288/11776 cut-off events. For 385751/385778 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 129301 event pairs, 290 based on Foata normal form. 18/11610 useless extension candidates. Maximal degree in co-relation 97455. Up to 1595 conditions per place. [2022-12-05 19:17:45,855 INFO L137 encePairwiseOnDemand]: 66/80 looper letters, 912 selfloop transitions, 1913 changer transitions 7/2880 dead transitions. [2022-12-05 19:17:45,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 2880 transitions, 64994 flow [2022-12-05 19:17:45,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-12-05 19:17:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2022-12-05 19:17:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 5609 transitions. [2022-12-05 19:17:45,859 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.745877659574468 [2022-12-05 19:17:45,859 INFO L175 Difference]: Start difference. First operand has 605 places, 1708 transitions, 34391 flow. Second operand 94 states and 5609 transitions. [2022-12-05 19:17:45,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 2880 transitions, 64994 flow [2022-12-05 19:17:50,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 672 places, 2880 transitions, 64027 flow, removed 117 selfloop flow, removed 19 redundant places. [2022-12-05 19:17:50,813 INFO L231 Difference]: Finished difference. Result has 700 places, 2673 transitions, 61095 flow [2022-12-05 19:17:50,815 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=33654, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1052, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=61095, PETRI_PLACES=700, PETRI_TRANSITIONS=2673} [2022-12-05 19:17:50,815 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 629 predicate places. [2022-12-05 19:17:50,815 INFO L495 AbstractCegarLoop]: Abstraction has has 700 places, 2673 transitions, 61095 flow [2022-12-05 19:17:50,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.27777777777778) internal successors, (1049), 18 states have internal predecessors, (1049), 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 19:17:50,816 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:17:50,816 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:50,822 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 19:17:51,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-05 19:17:51,020 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:17:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:17:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1446398630, now seen corresponding path program 10 times [2022-12-05 19:17:51,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:17:51,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810391841] [2022-12-05 19:17:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:17:51,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:17:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:17:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:51,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:17:51,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810391841] [2022-12-05 19:17:51,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810391841] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:17:51,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773194458] [2022-12-05 19:17:51,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 19:17:51,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:17:51,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:17:51,147 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 19:17:51,154 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 19:17:51,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 19:17:51,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:17:51,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 19:17:51,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:17:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:51,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:17:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:17:51,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773194458] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:17:51,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:17:51,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-05 19:17:51,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912354937] [2022-12-05 19:17:51,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:17:51,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 19:17:51,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:17:51,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 19:17:51,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-12-05 19:17:51,358 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:17:51,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 2673 transitions, 61095 flow. Second operand has 18 states, 18 states have (on average 58.27777777777778) internal successors, (1049), 18 states have internal predecessors, (1049), 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 19:17:51,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:17:51,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:17:51,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:18:00,602 INFO L130 PetriNetUnfolder]: 4789/13292 cut-off events. [2022-12-05 19:18:00,602 INFO L131 PetriNetUnfolder]: For 519137/519173 co-relation queries the response was YES. [2022-12-05 19:18:00,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118870 conditions, 13292 events. 4789/13292 cut-off events. For 519137/519173 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 149164 event pairs, 464 based on Foata normal form. 19/13042 useless extension candidates. Maximal degree in co-relation 118628. Up to 2278 conditions per place. [2022-12-05 19:18:00,828 INFO L137 encePairwiseOnDemand]: 66/80 looper letters, 1150 selfloop transitions, 1849 changer transitions 8/3055 dead transitions. [2022-12-05 19:18:00,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 3055 transitions, 75947 flow [2022-12-05 19:18:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-05 19:18:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-12-05 19:18:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3465 transitions. [2022-12-05 19:18:00,831 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7598684210526315 [2022-12-05 19:18:00,831 INFO L175 Difference]: Start difference. First operand has 700 places, 2673 transitions, 61095 flow. Second operand 57 states and 3465 transitions. [2022-12-05 19:18:00,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 3055 transitions, 75947 flow [2022-12-05 19:18:12,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 749 places, 3055 transitions, 73559 flow, removed 1155 selfloop flow, removed 6 redundant places. [2022-12-05 19:18:12,255 INFO L231 Difference]: Finished difference. Result has 769 places, 2892 transitions, 70063 flow [2022-12-05 19:18:12,257 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=59389, PETRI_DIFFERENCE_MINUEND_PLACES=693, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1649, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=976, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=70063, PETRI_PLACES=769, PETRI_TRANSITIONS=2892} [2022-12-05 19:18:12,257 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 698 predicate places. [2022-12-05 19:18:12,258 INFO L495 AbstractCegarLoop]: Abstraction has has 769 places, 2892 transitions, 70063 flow [2022-12-05 19:18:12,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.27777777777778) internal successors, (1049), 18 states have internal predecessors, (1049), 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 19:18:12,258 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:18:12,258 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:18:12,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-05 19:18:12,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-05 19:18:12,462 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:18:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:18:12,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1920428106, now seen corresponding path program 11 times [2022-12-05 19:18:12,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:18:12,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961707076] [2022-12-05 19:18:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:18:12,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:18:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:18:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:18:12,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:18:12,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961707076] [2022-12-05 19:18:12,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961707076] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:18:12,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669785730] [2022-12-05 19:18:12,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 19:18:12,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:18:12,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:18:12,676 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:18:12,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-05 19:18:12,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:18:12,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:18:12,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-05 19:18:12,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:18:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:18:12,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:18:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:18:13,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669785730] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:18:13,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:18:13,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-05 19:18:13,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549978486] [2022-12-05 19:18:13,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:18:13,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-05 19:18:13,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:18:13,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-05 19:18:13,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-12-05 19:18:13,042 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:18:13,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 2892 transitions, 70063 flow. Second operand has 23 states, 23 states have (on average 58.17391304347826) internal successors, (1338), 23 states have internal predecessors, (1338), 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 19:18:13,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:18:13,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:18:13,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:18:27,547 INFO L130 PetriNetUnfolder]: 5835/16469 cut-off events. [2022-12-05 19:18:27,547 INFO L131 PetriNetUnfolder]: For 623648/623678 co-relation queries the response was YES. [2022-12-05 19:18:27,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148375 conditions, 16469 events. 5835/16469 cut-off events. For 623648/623678 co-relation queries the response was YES. Maximal size of possible extension queue 1155. Compared 192618 event pairs, 156 based on Foata normal form. 86/16501 useless extension candidates. Maximal degree in co-relation 148111. Up to 1801 conditions per place. [2022-12-05 19:18:27,865 INFO L137 encePairwiseOnDemand]: 65/80 looper letters, 646 selfloop transitions, 3345 changer transitions 6/4045 dead transitions. [2022-12-05 19:18:27,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 882 places, 4045 transitions, 105068 flow [2022-12-05 19:18:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-12-05 19:18:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2022-12-05 19:18:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 7218 transitions. [2022-12-05 19:18:27,889 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7456611570247934 [2022-12-05 19:18:27,889 INFO L175 Difference]: Start difference. First operand has 769 places, 2892 transitions, 70063 flow. Second operand 121 states and 7218 transitions. [2022-12-05 19:18:27,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 882 places, 4045 transitions, 105068 flow [2022-12-05 19:18:41,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 872 places, 4045 transitions, 104247 flow, removed 356 selfloop flow, removed 10 redundant places. [2022-12-05 19:18:41,101 INFO L231 Difference]: Finished difference. Result has 908 places, 3846 transitions, 105212 flow [2022-12-05 19:18:41,103 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=69172, PETRI_DIFFERENCE_MINUEND_PLACES=752, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2879, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=105212, PETRI_PLACES=908, PETRI_TRANSITIONS=3846} [2022-12-05 19:18:41,103 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 837 predicate places. [2022-12-05 19:18:41,103 INFO L495 AbstractCegarLoop]: Abstraction has has 908 places, 3846 transitions, 105212 flow [2022-12-05 19:18:41,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 58.17391304347826) internal successors, (1338), 23 states have internal predecessors, (1338), 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 19:18:41,104 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:18:41,104 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:18:41,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-05 19:18:41,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-05 19:18:41,308 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:18:41,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:18:41,308 INFO L85 PathProgramCache]: Analyzing trace with hash -315972770, now seen corresponding path program 12 times [2022-12-05 19:18:41,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:18:41,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25322973] [2022-12-05 19:18:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:18:41,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:18:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:18:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:18:41,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:18:41,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25322973] [2022-12-05 19:18:41,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25322973] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:18:41,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514956451] [2022-12-05 19:18:41,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 19:18:41,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:18:41,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:18:41,439 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:18:41,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-05 19:18:41,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 19:18:41,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:18:41,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 19:18:41,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:18:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:18:41,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:18:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:18:41,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514956451] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:18:41,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:18:41,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-05 19:18:41,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630237839] [2022-12-05 19:18:41,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:18:41,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 19:18:41,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:18:41,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 19:18:41,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-05 19:18:41,690 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:18:41,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 908 places, 3846 transitions, 105212 flow. Second operand has 19 states, 19 states have (on average 58.26315789473684) internal successors, (1107), 19 states have internal predecessors, (1107), 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 19:18:41,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:18:41,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:18:41,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:19:00,775 INFO L130 PetriNetUnfolder]: 6119/17334 cut-off events. [2022-12-05 19:19:00,775 INFO L131 PetriNetUnfolder]: For 730728/730773 co-relation queries the response was YES. [2022-12-05 19:19:01,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170973 conditions, 17334 events. 6119/17334 cut-off events. For 730728/730773 co-relation queries the response was YES. Maximal size of possible extension queue 1215. Compared 205008 event pairs, 565 based on Foata normal form. 64/17082 useless extension candidates. Maximal degree in co-relation 169878. Up to 2719 conditions per place. [2022-12-05 19:19:01,155 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 1069 selfloop transitions, 3052 changer transitions 5/4174 dead transitions. [2022-12-05 19:19:01,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 982 places, 4174 transitions, 121589 flow [2022-12-05 19:19:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-05 19:19:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-12-05 19:19:01,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5002 transitions. [2022-12-05 19:19:01,182 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7533132530120482 [2022-12-05 19:19:01,182 INFO L175 Difference]: Start difference. First operand has 908 places, 3846 transitions, 105212 flow. Second operand 83 states and 5002 transitions. [2022-12-05 19:19:01,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 982 places, 4174 transitions, 121589 flow [2022-12-05 19:19:19,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 952 places, 4174 transitions, 120197 flow, removed 438 selfloop flow, removed 30 redundant places. [2022-12-05 19:19:20,072 INFO L231 Difference]: Finished difference. Result has 969 places, 3991 transitions, 117893 flow [2022-12-05 19:19:20,075 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=103486, PETRI_DIFFERENCE_MINUEND_PLACES=870, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2895, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=117893, PETRI_PLACES=969, PETRI_TRANSITIONS=3991} [2022-12-05 19:19:20,075 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 898 predicate places. [2022-12-05 19:19:20,075 INFO L495 AbstractCegarLoop]: Abstraction has has 969 places, 3991 transitions, 117893 flow [2022-12-05 19:19:20,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.26315789473684) internal successors, (1107), 19 states have internal predecessors, (1107), 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 19:19:20,075 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:19:20,076 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:20,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-05 19:19:20,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:19:20,280 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:19:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:19:20,281 INFO L85 PathProgramCache]: Analyzing trace with hash 507628464, now seen corresponding path program 13 times [2022-12-05 19:19:20,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:19:20,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895896201] [2022-12-05 19:19:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:19:20,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:19:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:19:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:19:20,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:19:20,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895896201] [2022-12-05 19:19:20,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895896201] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:19:20,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650523886] [2022-12-05 19:19:20,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 19:19:20,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:19:20,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:19:20,421 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:19:20,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-05 19:19:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:19:20,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 19:19:20,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:19:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:19:20,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:19:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:19:20,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650523886] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:19:20,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:19:20,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-05 19:19:20,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406591767] [2022-12-05 19:19:20,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:19:20,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 19:19:20,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:19:20,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 19:19:20,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-12-05 19:19:20,625 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:19:20,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 3991 transitions, 117893 flow. Second operand has 19 states, 19 states have (on average 58.1578947368421) internal successors, (1105), 19 states have internal predecessors, (1105), 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 19:19:20,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:19:20,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:19:20,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:19:45,119 INFO L130 PetriNetUnfolder]: 7134/19849 cut-off events. [2022-12-05 19:19:45,119 INFO L131 PetriNetUnfolder]: For 1083276/1083317 co-relation queries the response was YES. [2022-12-05 19:19:45,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214052 conditions, 19849 events. 7134/19849 cut-off events. For 1083276/1083317 co-relation queries the response was YES. Maximal size of possible extension queue 1397. Compared 238443 event pairs, 709 based on Foata normal form. 26/19505 useless extension candidates. Maximal degree in co-relation 212438. Up to 3659 conditions per place. [2022-12-05 19:19:45,536 INFO L137 encePairwiseOnDemand]: 66/80 looper letters, 2415 selfloop transitions, 2268 changer transitions 5/4736 dead transitions. [2022-12-05 19:19:45,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1020 places, 4736 transitions, 148141 flow [2022-12-05 19:19:45,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-05 19:19:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-12-05 19:19:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3222 transitions. [2022-12-05 19:19:45,539 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7599056603773585 [2022-12-05 19:19:45,539 INFO L175 Difference]: Start difference. First operand has 969 places, 3991 transitions, 117893 flow. Second operand 53 states and 3222 transitions. [2022-12-05 19:19:45,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1020 places, 4736 transitions, 148141 flow [2022-12-05 19:20:08,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 977 places, 4736 transitions, 145968 flow, removed 456 selfloop flow, removed 43 redundant places. [2022-12-05 19:20:08,659 INFO L231 Difference]: Finished difference. Result has 998 places, 4501 transitions, 139872 flow [2022-12-05 19:20:08,662 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=116052, PETRI_DIFFERENCE_MINUEND_PLACES=925, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1813, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2032, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=139872, PETRI_PLACES=998, PETRI_TRANSITIONS=4501} [2022-12-05 19:20:08,662 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 927 predicate places. [2022-12-05 19:20:08,662 INFO L495 AbstractCegarLoop]: Abstraction has has 998 places, 4501 transitions, 139872 flow [2022-12-05 19:20:08,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.1578947368421) internal successors, (1105), 19 states have internal predecessors, (1105), 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 19:20:08,663 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:20:08,663 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:08,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-05 19:20:08,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-05 19:20:08,868 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:20:08,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:20:08,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1998339830, now seen corresponding path program 14 times [2022-12-05 19:20:08,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:20:08,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655848073] [2022-12-05 19:20:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:20:08,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:20:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:20:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:20:08,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:20:08,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655848073] [2022-12-05 19:20:08,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655848073] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:20:08,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571286667] [2022-12-05 19:20:08,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:20:08,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:20:08,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:20:09,004 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:20:09,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-05 19:20:09,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:20:09,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:20:09,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 19:20:09,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:20:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:20:09,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:20:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:20:09,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571286667] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:20:09,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:20:09,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-05 19:20:09,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285785447] [2022-12-05 19:20:09,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:20:09,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 19:20:09,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:20:09,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 19:20:09,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-05 19:20:09,268 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:20:09,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 998 places, 4501 transitions, 139872 flow. Second operand has 18 states, 18 states have (on average 58.666666666666664) internal successors, (1056), 18 states have internal predecessors, (1056), 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 19:20:09,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:20:09,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:20:09,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:20:42,312 INFO L130 PetriNetUnfolder]: 8380/23373 cut-off events. [2022-12-05 19:20:42,312 INFO L131 PetriNetUnfolder]: For 1399192/1399289 co-relation queries the response was YES. [2022-12-05 19:20:43,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264597 conditions, 23373 events. 8380/23373 cut-off events. For 1399192/1399289 co-relation queries the response was YES. Maximal size of possible extension queue 1635. Compared 288528 event pairs, 653 based on Foata normal form. 65/23035 useless extension candidates. Maximal degree in co-relation 263319. Up to 3848 conditions per place. [2022-12-05 19:20:43,577 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 1218 selfloop transitions, 4476 changer transitions 3/5745 dead transitions. [2022-12-05 19:20:43,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1071 places, 5745 transitions, 189511 flow [2022-12-05 19:20:43,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-05 19:20:43,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-12-05 19:20:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4501 transitions. [2022-12-05 19:20:43,599 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7501666666666666 [2022-12-05 19:20:43,599 INFO L175 Difference]: Start difference. First operand has 998 places, 4501 transitions, 139872 flow. Second operand 75 states and 4501 transitions. [2022-12-05 19:20:43,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1071 places, 5745 transitions, 189511 flow [2022-12-05 19:21:24,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1061 places, 5745 transitions, 188380 flow, removed 459 selfloop flow, removed 10 redundant places. [2022-12-05 19:21:24,965 INFO L231 Difference]: Finished difference. Result has 1090 places, 5626 transitions, 190646 flow [2022-12-05 19:21:24,969 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=138964, PETRI_DIFFERENCE_MINUEND_PLACES=987, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=773, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=190646, PETRI_PLACES=1090, PETRI_TRANSITIONS=5626} [2022-12-05 19:21:24,969 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 1019 predicate places. [2022-12-05 19:21:24,969 INFO L495 AbstractCegarLoop]: Abstraction has has 1090 places, 5626 transitions, 190646 flow [2022-12-05 19:21:24,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.666666666666664) internal successors, (1056), 18 states have internal predecessors, (1056), 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 19:21:24,970 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:21:24,970 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:24,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-05 19:21:25,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:21:25,175 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:21:25,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:21:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash -9153186, now seen corresponding path program 15 times [2022-12-05 19:21:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:21:25,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730357560] [2022-12-05 19:21:25,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:21:25,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:21:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:21:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:21:25,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:21:25,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730357560] [2022-12-05 19:21:25,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730357560] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:21:25,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704174917] [2022-12-05 19:21:25,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 19:21:25,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:21:25,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:21:25,294 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:21:25,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-05 19:21:25,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 19:21:25,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:21:25,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 19:21:25,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:21:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:21:25,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:21:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:21:25,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704174917] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:21:25,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:21:25,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-05 19:21:25,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447053318] [2022-12-05 19:21:25,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:21:25,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 19:21:25,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:21:25,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 19:21:25,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-12-05 19:21:25,561 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:21:25,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1090 places, 5626 transitions, 190646 flow. Second operand has 19 states, 19 states have (on average 58.68421052631579) internal successors, (1115), 19 states have internal predecessors, (1115), 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 19:21:25,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:21:25,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:21:25,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:22:11,532 INFO L130 PetriNetUnfolder]: 9258/25748 cut-off events. [2022-12-05 19:22:11,532 INFO L131 PetriNetUnfolder]: For 1639884/1639975 co-relation queries the response was YES. [2022-12-05 19:22:12,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305990 conditions, 25748 events. 9258/25748 cut-off events. For 1639884/1639975 co-relation queries the response was YES. Maximal size of possible extension queue 1843. Compared 322513 event pairs, 517 based on Foata normal form. 71/25561 useless extension candidates. Maximal degree in co-relation 304822. Up to 3962 conditions per place. [2022-12-05 19:22:12,200 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 1343 selfloop transitions, 5146 changer transitions 14/6551 dead transitions. [2022-12-05 19:22:12,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1222 places, 6551 transitions, 233216 flow [2022-12-05 19:22:12,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-12-05 19:22:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2022-12-05 19:22:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 7892 transitions. [2022-12-05 19:22:12,206 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7417293233082707 [2022-12-05 19:22:12,206 INFO L175 Difference]: Start difference. First operand has 1090 places, 5626 transitions, 190646 flow. Second operand 133 states and 7892 transitions. [2022-12-05 19:22:12,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1222 places, 6551 transitions, 233216 flow [2022-12-05 19:23:07,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1208 places, 6551 transitions, 232149 flow, removed 417 selfloop flow, removed 14 redundant places. [2022-12-05 19:23:07,656 INFO L231 Difference]: Finished difference. Result has 1245 places, 6396 transitions, 235492 flow [2022-12-05 19:23:07,660 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=189891, PETRI_DIFFERENCE_MINUEND_PLACES=1076, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1055, PETRI_DIFFERENCE_SUBTRAHEND_STATES=133, PETRI_FLOW=235492, PETRI_PLACES=1245, PETRI_TRANSITIONS=6396} [2022-12-05 19:23:07,660 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 1174 predicate places. [2022-12-05 19:23:07,660 INFO L495 AbstractCegarLoop]: Abstraction has has 1245 places, 6396 transitions, 235492 flow [2022-12-05 19:23:07,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.68421052631579) internal successors, (1115), 19 states have internal predecessors, (1115), 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 19:23:07,661 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:23:07,661 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:23:07,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-05 19:23:07,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:23:07,866 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:23:07,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:23:07,866 INFO L85 PathProgramCache]: Analyzing trace with hash -31561808, now seen corresponding path program 16 times [2022-12-05 19:23:07,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:23:07,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403092090] [2022-12-05 19:23:07,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:23:07,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:23:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:23:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:23:07,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:23:07,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403092090] [2022-12-05 19:23:07,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403092090] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:23:07,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049484539] [2022-12-05 19:23:07,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 19:23:07,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:23:07,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:23:07,974 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:23:07,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-05 19:23:08,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 19:23:08,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:23:08,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 19:23:08,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:23:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:23:08,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:23:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:23:08,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049484539] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:23:08,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:23:08,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-05 19:23:08,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600252924] [2022-12-05 19:23:08,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:23:08,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 19:23:08,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:23:08,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 19:23:08,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-12-05 19:23:08,172 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:23:08,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1245 places, 6396 transitions, 235492 flow. Second operand has 17 states, 17 states have (on average 58.411764705882355) internal successors, (993), 17 states have internal predecessors, (993), 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 19:23:08,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:23:08,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:23:08,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:24:04,105 INFO L130 PetriNetUnfolder]: 9242/25434 cut-off events. [2022-12-05 19:24:04,105 INFO L131 PetriNetUnfolder]: For 1937244/1937338 co-relation queries the response was YES. [2022-12-05 19:24:04,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329755 conditions, 25434 events. 9242/25434 cut-off events. For 1937244/1937338 co-relation queries the response was YES. Maximal size of possible extension queue 1813. Compared 316976 event pairs, 1319 based on Foata normal form. 22/24833 useless extension candidates. Maximal degree in co-relation 329211. Up to 7857 conditions per place. [2022-12-05 19:24:05,020 INFO L137 encePairwiseOnDemand]: 67/80 looper letters, 3257 selfloop transitions, 3136 changer transitions 5/6446 dead transitions. [2022-12-05 19:24:05,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1277 places, 6446 transitions, 249371 flow [2022-12-05 19:24:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-05 19:24:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-05 19:24:05,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1999 transitions. [2022-12-05 19:24:05,023 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7571969696969697 [2022-12-05 19:24:05,023 INFO L175 Difference]: Start difference. First operand has 1245 places, 6396 transitions, 235492 flow. Second operand 33 states and 1999 transitions. [2022-12-05 19:24:05,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1277 places, 6446 transitions, 249371 flow [2022-12-05 19:25:13,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1248 places, 6446 transitions, 247623 flow, removed 699 selfloop flow, removed 29 redundant places. [2022-12-05 19:25:14,042 INFO L231 Difference]: Finished difference. Result has 1250 places, 6395 transitions, 240003 flow [2022-12-05 19:25:14,045 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=233747, PETRI_DIFFERENCE_MINUEND_PLACES=1216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=240003, PETRI_PLACES=1250, PETRI_TRANSITIONS=6395} [2022-12-05 19:25:14,045 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 1179 predicate places. [2022-12-05 19:25:14,045 INFO L495 AbstractCegarLoop]: Abstraction has has 1250 places, 6395 transitions, 240003 flow [2022-12-05 19:25:14,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 58.411764705882355) internal successors, (993), 17 states have internal predecessors, (993), 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 19:25:14,046 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:25:14,046 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:25:14,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-05 19:25:14,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:25:14,251 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:25:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:25:14,251 INFO L85 PathProgramCache]: Analyzing trace with hash -39752342, now seen corresponding path program 17 times [2022-12-05 19:25:14,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:25:14,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287811485] [2022-12-05 19:25:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:25:14,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:25:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:25:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:25:14,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:25:14,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287811485] [2022-12-05 19:25:14,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287811485] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:25:14,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244309021] [2022-12-05 19:25:14,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 19:25:14,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:25:14,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:25:14,381 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:25:14,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-05 19:25:14,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:25:14,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:25:14,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-05 19:25:14,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:25:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:25:14,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:25:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:25:14,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244309021] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:25:14,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:25:14,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-05 19:25:14,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920374085] [2022-12-05 19:25:14,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:25:14,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 19:25:14,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:25:14,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 19:25:14,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-12-05 19:25:14,712 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:25:14,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1250 places, 6395 transitions, 240003 flow. Second operand has 22 states, 22 states have (on average 58.31818181818182) internal successors, (1283), 22 states have internal predecessors, (1283), 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 19:25:14,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:25:14,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:25:14,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:26:32,191 INFO L130 PetriNetUnfolder]: 10562/30373 cut-off events. [2022-12-05 19:26:32,191 INFO L131 PetriNetUnfolder]: For 2300653/2300708 co-relation queries the response was YES. [2022-12-05 19:26:33,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381192 conditions, 30373 events. 10562/30373 cut-off events. For 2300653/2300708 co-relation queries the response was YES. Maximal size of possible extension queue 2079. Compared 393600 event pairs, 247 based on Foata normal form. 99/30380 useless extension candidates. Maximal degree in co-relation 380660. Up to 3302 conditions per place. [2022-12-05 19:26:34,136 INFO L137 encePairwiseOnDemand]: 65/80 looper letters, 1228 selfloop transitions, 6280 changer transitions 5/7561 dead transitions. [2022-12-05 19:26:34,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1341 places, 7561 transitions, 294437 flow [2022-12-05 19:26:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-12-05 19:26:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-12-05 19:26:34,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5680 transitions. [2022-12-05 19:26:34,140 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7473684210526316 [2022-12-05 19:26:34,140 INFO L175 Difference]: Start difference. First operand has 1250 places, 6395 transitions, 240003 flow. Second operand 95 states and 5680 transitions. [2022-12-05 19:26:34,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1341 places, 7561 transitions, 294437 flow [2022-12-05 19:27:58,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1322 places, 7561 transitions, 288695 flow, removed 7 selfloop flow, removed 19 redundant places. [2022-12-05 19:27:58,923 INFO L231 Difference]: Finished difference. Result has 1361 places, 7358 transitions, 291968 flow [2022-12-05 19:27:58,927 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=235025, PETRI_DIFFERENCE_MINUEND_PLACES=1228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=941, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=291968, PETRI_PLACES=1361, PETRI_TRANSITIONS=7358} [2022-12-05 19:27:58,927 INFO L294 CegarLoopForPetriNet]: 71 programPoint places, 1290 predicate places. [2022-12-05 19:27:58,928 INFO L495 AbstractCegarLoop]: Abstraction has has 1361 places, 7358 transitions, 291968 flow [2022-12-05 19:27:58,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 58.31818181818182) internal successors, (1283), 22 states have internal predecessors, (1283), 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 19:27:58,928 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:27:58,928 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:27:58,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-05 19:27:59,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:27:59,133 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:27:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:27:59,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2099130924, now seen corresponding path program 18 times [2022-12-05 19:27:59,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:27:59,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574639497] [2022-12-05 19:27:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:27:59,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:27:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:27:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:27:59,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:27:59,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574639497] [2022-12-05 19:27:59,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574639497] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:27:59,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159481179] [2022-12-05 19:27:59,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 19:27:59,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:27:59,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:27:59,274 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:27:59,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-05 19:27:59,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 19:27:59,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:27:59,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 19:27:59,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:27:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:27:59,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:27:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:27:59,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159481179] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:27:59,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:27:59,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-05 19:27:59,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179317214] [2022-12-05 19:27:59,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:27:59,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 19:27:59,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:27:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 19:27:59,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-12-05 19:27:59,550 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-05 19:27:59,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1361 places, 7358 transitions, 291968 flow. Second operand has 18 states, 18 states have (on average 58.666666666666664) internal successors, (1056), 18 states have internal predecessors, (1056), 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 19:27:59,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:27:59,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-05 19:27:59,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:29:25,683 INFO L130 PetriNetUnfolder]: 11463/32711 cut-off events. [2022-12-05 19:29:25,684 INFO L131 PetriNetUnfolder]: For 2743066/2743120 co-relation queries the response was YES. [2022-12-05 19:29:27,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435224 conditions, 32711 events. 11463/32711 cut-off events. For 2743066/2743120 co-relation queries the response was YES. Maximal size of possible extension queue 2247. Compared 427778 event pairs, 1147 based on Foata normal form. 145/32360 useless extension candidates. Maximal degree in co-relation 434650. Up to 7216 conditions per place. [2022-12-05 19:29:27,352 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 3363 selfloop transitions, 4944 changer transitions 9/8364 dead transitions. [2022-12-05 19:29:27,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1437 places, 8364 transitions, 347338 flow [2022-12-05 19:29:27,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-05 19:29:27,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-12-05 19:29:27,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4641 transitions. [2022-12-05 19:29:27,355 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7534090909090909 [2022-12-05 19:29:27,356 INFO L175 Difference]: Start difference. First operand has 1361 places, 7358 transitions, 291968 flow. Second operand 77 states and 4641 transitions. [2022-12-05 19:29:27,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1437 places, 8364 transitions, 347338 flow Received shutdown request... [2022-12-05 19:30:49,563 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 19:30:49,563 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 19:30:49,642 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-05 19:30:49,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-05 19:30:49,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-05 19:30:49,850 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-12-05 19:30:49,852 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-05 19:30:49,852 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-05 19:30:49,852 INFO L458 BasicCegarLoop]: Path program histogram: [18, 4, 1] [2022-12-05 19:30:49,854 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 19:30:49,854 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 19:30:49,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 07:30:49 BasicIcfg [2022-12-05 19:30:49,857 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 19:30:49,857 INFO L158 Benchmark]: Toolchain (without parser) took 825675.29ms. Allocated memory was 211.8MB in the beginning and 5.2GB in the end (delta: 5.0GB). Free memory was 187.8MB in the beginning and 2.8GB in the end (delta: -2.6GB). Peak memory consumption was 3.8GB. Max. memory is 8.0GB. [2022-12-05 19:30:49,857 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 211.8MB. Free memory is still 188.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 19:30:49,857 INFO L158 Benchmark]: CACSL2BoogieTranslator took 145.77ms. Allocated memory is still 211.8MB. Free memory was 187.8MB in the beginning and 176.4MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-05 19:30:49,858 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.65ms. Allocated memory is still 211.8MB. Free memory was 176.4MB in the beginning and 174.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-05 19:30:49,858 INFO L158 Benchmark]: Boogie Preprocessor took 27.09ms. Allocated memory is still 211.8MB. Free memory was 174.9MB in the beginning and 173.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 19:30:49,858 INFO L158 Benchmark]: RCFGBuilder took 322.42ms. Allocated memory is still 211.8MB. Free memory was 173.3MB in the beginning and 160.2MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-05 19:30:49,858 INFO L158 Benchmark]: TraceAbstraction took 825144.85ms. Allocated memory was 211.8MB in the beginning and 5.2GB in the end (delta: 5.0GB). Free memory was 159.2MB in the beginning and 2.8GB in the end (delta: -2.6GB). Peak memory consumption was 3.8GB. Max. memory is 8.0GB. [2022-12-05 19:30:49,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 211.8MB. Free memory is still 188.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 145.77ms. Allocated memory is still 211.8MB. Free memory was 187.8MB in the beginning and 176.4MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.65ms. Allocated memory is still 211.8MB. Free memory was 176.4MB in the beginning and 174.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.09ms. Allocated memory is still 211.8MB. Free memory was 174.9MB in the beginning and 173.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 322.42ms. Allocated memory is still 211.8MB. Free memory was 173.3MB in the beginning and 160.2MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 825144.85ms. Allocated memory was 211.8MB in the beginning and 5.2GB in the end (delta: 5.0GB). Free memory was 159.2MB in the beginning and 2.8GB in the end (delta: -2.6GB). Peak memory consumption was 3.8GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 825.0s, OverallIterations: 23, TraceHistogramMax: 2, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 811.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5601 SdHoareTripleChecker+Valid, 7.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5601 mSDsluCounter, 3397 SdHoareTripleChecker+Invalid, 6.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2831 mSDsCounter, 503 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13204 IncrementalHoareTripleChecker+Invalid, 13707 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 503 mSolverCounterUnsat, 566 mSDtfsCounter, 13204 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4016 GetRequests, 2571 SyntacticMatches, 27 SemanticMatches, 1418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44240 ImplicationChecksByTransitivity, 22.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=291968occurred in iteration=22, InterpolantAutomatonStates: 1215, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 2882 NumberOfCodeBlocks, 2732 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 4174 ConstructedInterpolants, 0 QuantifiedInterpolants, 15724 SizeOfPredicates, 150 NumberOfNonLiveVariables, 2856 ConjunctsInSsa, 260 ConjunctsInUnsatCore, 63 InterpolantComputations, 4 PerfectInterpolantSequences, 166/422 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown