/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 --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_REDUNDANT_FLOW -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 13:35:54,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 13:35:54,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 13:35:54,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 13:35:54,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 13:35:54,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 13:35:54,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 13:35:54,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 13:35:54,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 13:35:54,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 13:35:54,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 13:35:54,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 13:35:54,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 13:35:54,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 13:35:54,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 13:35:54,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 13:35:54,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 13:35:54,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 13:35:54,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 13:35:54,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 13:35:54,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 13:35:54,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 13:35:54,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 13:35:54,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 13:35:54,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 13:35:54,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 13:35:54,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 13:35:54,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 13:35:54,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 13:35:54,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 13:35:54,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 13:35:54,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 13:35:54,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 13:35:54,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 13:35:54,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 13:35:54,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 13:35:54,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 13:35:54,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 13:35:54,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 13:35:54,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 13:35:54,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 13:35:54,968 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 [2022-12-12 13:35:54,982 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 13:35:54,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 13:35:54,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 13:35:54,991 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 13:35:55,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 13:35:55,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 13:35:55,007 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 13:35:55,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 13:35:55,007 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 13:35:55,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 13:35:55,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 13:35:55,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 13:35:55,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 13:35:55,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 13:35:55,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 13:35:55,008 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 13:35:55,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 13:35:55,008 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 13:35:55,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 13:35:55,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 13:35:55,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 13:35:55,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 13:35:55,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 13:35:55,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 13:35:55,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 13:35:55,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 13:35:55,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 13:35:55,009 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-12 13:35:55,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 13:35:55,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 13:35:55,010 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 13:35:55,010 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_REDUNDANT_FLOW [2022-12-12 13:35:55,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 13:35:55,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 13:35:55,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 13:35:55,324 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 13:35:55,324 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 13:35:55,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2022-12-12 13:35:56,238 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 13:35:56,437 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 13:35:56,437 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2022-12-12 13:35:56,442 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e82754407/829307b3f65d4977a437d74d103977a3/FLAG3bdb04105 [2022-12-12 13:35:56,455 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e82754407/829307b3f65d4977a437d74d103977a3 [2022-12-12 13:35:56,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 13:35:56,458 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 13:35:56,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 13:35:56,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 13:35:56,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 13:35:56,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 01:35:56" (1/1) ... [2022-12-12 13:35:56,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d364e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:35:56, skipping insertion in model container [2022-12-12 13:35:56,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 01:35:56" (1/1) ... [2022-12-12 13:35:56,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 13:35:56,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 13:35:56,568 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:35:56,568 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:35:56,571 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:35:56,571 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:35:56,575 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-nonblocking-cntr.wvr.c[2037,2050] [2022-12-12 13:35:56,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 13:35:56,584 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 13:35:56,593 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:35:56,593 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:35:56,594 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:35:56,594 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:35:56,597 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-nonblocking-cntr.wvr.c[2037,2050] [2022-12-12 13:35:56,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 13:35:56,607 INFO L208 MainTranslator]: Completed translation [2022-12-12 13:35:56,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:35:56 WrapperNode [2022-12-12 13:35:56,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 13:35:56,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 13:35:56,608 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 13:35:56,608 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 13:35:56,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:35:56" (1/1) ... [2022-12-12 13:35:56,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:35:56" (1/1) ... [2022-12-12 13:35:56,629 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-12-12 13:35:56,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 13:35:56,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 13:35:56,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 13:35:56,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 13:35:56,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:35:56" (1/1) ... [2022-12-12 13:35:56,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:35:56" (1/1) ... [2022-12-12 13:35:56,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:35:56" (1/1) ... [2022-12-12 13:35:56,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:35:56" (1/1) ... [2022-12-12 13:35:56,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:35:56" (1/1) ... [2022-12-12 13:35:56,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:35:56" (1/1) ... [2022-12-12 13:35:56,644 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:35:56" (1/1) ... [2022-12-12 13:35:56,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:35:56" (1/1) ... [2022-12-12 13:35:56,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 13:35:56,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 13:35:56,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 13:35:56,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 13:35:56,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:35:56" (1/1) ... [2022-12-12 13:35:56,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 13:35:56,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:35:56,697 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) [2022-12-12 13:35:56,711 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 [2022-12-12 13:35:56,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 13:35:56,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 13:35:56,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 13:35:56,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 13:35:56,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 13:35:56,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 13:35:56,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 13:35:56,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 13:35:56,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 13:35:56,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 13:35:56,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 13:35:56,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 13:35:56,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 13:35:56,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 13:35:56,728 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 13:35:56,843 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 13:35:56,845 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 13:35:56,972 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 13:35:56,993 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 13:35:56,993 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-12 13:35:56,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 01:35:56 BoogieIcfgContainer [2022-12-12 13:35:56,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 13:35:56,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 13:35:56,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 13:35:56,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 13:35:56,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 01:35:56" (1/3) ... [2022-12-12 13:35:56,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48489852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 01:35:56, skipping insertion in model container [2022-12-12 13:35:56,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:35:56" (2/3) ... [2022-12-12 13:35:56,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48489852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 01:35:56, skipping insertion in model container [2022-12-12 13:35:56,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 01:35:56" (3/3) ... [2022-12-12 13:35:57,000 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-12-12 13:35:57,012 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 13:35:57,012 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 13:35:57,012 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 13:35:57,064 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 13:35:57,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 166 flow [2022-12-12 13:35:57,138 INFO L130 PetriNetUnfolder]: 6/73 cut-off events. [2022-12-12 13:35:57,138 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 13:35:57,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 6/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 42 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2022-12-12 13:35:57,142 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 75 transitions, 166 flow [2022-12-12 13:35:57,147 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 65 transitions, 142 flow [2022-12-12 13:35:57,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 13:35:57,164 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;@7b2e2977, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 13:35:57,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 13:35:57,195 INFO L130 PetriNetUnfolder]: 6/64 cut-off events. [2022-12-12 13:35:57,195 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 13:35:57,195 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:35:57,196 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 13:35:57,196 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:35:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:35:57,201 INFO L85 PathProgramCache]: Analyzing trace with hash -931653819, now seen corresponding path program 1 times [2022-12-12 13:35:57,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:35:57,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510739382] [2022-12-12 13:35:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:35:57,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:35:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:35:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:35:57,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:35:57,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510739382] [2022-12-12 13:35:57,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510739382] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 13:35:57,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 13:35:57,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-12 13:35:57,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462783421] [2022-12-12 13:35:57,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 13:35:57,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 13:35:57,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:35:57,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 13:35:57,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-12 13:35:57,656 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 75 [2022-12-12 13:35:57,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 49.833333333333336) internal successors, (299), 6 states have internal predecessors, (299), 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) [2022-12-12 13:35:57,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:35:57,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 75 [2022-12-12 13:35:57,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:35:57,719 INFO L130 PetriNetUnfolder]: 41/138 cut-off events. [2022-12-12 13:35:57,719 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-12-12 13:35:57,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 138 events. 41/138 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 358 event pairs, 15 based on Foata normal form. 2/116 useless extension candidates. Maximal degree in co-relation 159. Up to 59 conditions per place. [2022-12-12 13:35:57,721 INFO L137 encePairwiseOnDemand]: 65/75 looper letters, 22 selfloop transitions, 5 changer transitions 2/67 dead transitions. [2022-12-12 13:35:57,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 207 flow [2022-12-12 13:35:57,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 13:35:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 13:35:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 318 transitions. [2022-12-12 13:35:57,731 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2022-12-12 13:35:57,733 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2022-12-12 13:35:57,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 207 flow [2022-12-12 13:35:57,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 172 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-12-12 13:35:57,737 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 67 transitions, 172 flow [2022-12-12 13:35:57,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.833333333333336) internal successors, (299), 6 states have internal predecessors, (299), 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) [2022-12-12 13:35:57,738 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:35:57,738 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 13:35:57,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 13:35:57,738 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:35:57,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:35:57,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1203138814, now seen corresponding path program 1 times [2022-12-12 13:35:57,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:35:57,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160428638] [2022-12-12 13:35:57,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:35:57,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:35:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:35:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:35:57,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:35:57,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160428638] [2022-12-12 13:35:57,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160428638] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 13:35:57,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 13:35:57,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 13:35:57,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388131706] [2022-12-12 13:35:57,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 13:35:57,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 13:35:57,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:35:57,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 13:35:57,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 13:35:57,823 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 75 [2022-12-12 13:35:57,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 67 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 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) [2022-12-12 13:35:57,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:35:57,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 75 [2022-12-12 13:35:57,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:35:57,914 INFO L130 PetriNetUnfolder]: 89/283 cut-off events. [2022-12-12 13:35:57,914 INFO L131 PetriNetUnfolder]: For 64/89 co-relation queries the response was YES. [2022-12-12 13:35:57,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 283 events. 89/283 cut-off events. For 64/89 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1180 event pairs, 25 based on Foata normal form. 4/253 useless extension candidates. Maximal degree in co-relation 388. Up to 104 conditions per place. [2022-12-12 13:35:57,916 INFO L137 encePairwiseOnDemand]: 68/75 looper letters, 40 selfloop transitions, 6 changer transitions 5/93 dead transitions. [2022-12-12 13:35:57,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 93 transitions, 376 flow [2022-12-12 13:35:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 13:35:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 13:35:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 354 transitions. [2022-12-12 13:35:57,919 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7866666666666666 [2022-12-12 13:35:57,919 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2022-12-12 13:35:57,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 93 transitions, 376 flow [2022-12-12 13:35:57,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 93 transitions, 368 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-12 13:35:57,921 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 93 transitions, 368 flow [2022-12-12 13:35:57,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 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) [2022-12-12 13:35:57,921 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:35:57,922 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 13:35:57,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 13:35:57,922 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:35:57,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:35:57,922 INFO L85 PathProgramCache]: Analyzing trace with hash 344125130, now seen corresponding path program 2 times [2022-12-12 13:35:57,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:35:57,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752422450] [2022-12-12 13:35:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:35:57,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:35:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:35:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:35:58,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:35:58,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752422450] [2022-12-12 13:35:58,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752422450] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:35:58,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614428368] [2022-12-12 13:35:58,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 13:35:58,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:35:58,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:35:58,083 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) [2022-12-12 13:35:58,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 13:35:58,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-12 13:35:58,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:35:58,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-12 13:35:58,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:35:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 13:35:58,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 13:35:58,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614428368] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 13:35:58,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 13:35:58,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-12-12 13:35:58,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259438940] [2022-12-12 13:35:58,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 13:35:58,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 13:35:58,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:35:58,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 13:35:58,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-12 13:35:58,273 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 75 [2022-12-12 13:35:58,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 93 transitions, 368 flow. Second operand has 6 states, 6 states have (on average 48.166666666666664) internal successors, (289), 6 states have internal predecessors, (289), 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) [2022-12-12 13:35:58,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:35:58,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 75 [2022-12-12 13:35:58,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:35:58,373 INFO L130 PetriNetUnfolder]: 77/229 cut-off events. [2022-12-12 13:35:58,373 INFO L131 PetriNetUnfolder]: For 78/132 co-relation queries the response was YES. [2022-12-12 13:35:58,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 671 conditions, 229 events. 77/229 cut-off events. For 78/132 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 778 event pairs, 29 based on Foata normal form. 2/206 useless extension candidates. Maximal degree in co-relation 420. Up to 99 conditions per place. [2022-12-12 13:35:58,375 INFO L137 encePairwiseOnDemand]: 67/75 looper letters, 34 selfloop transitions, 7 changer transitions 2/80 dead transitions. [2022-12-12 13:35:58,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 80 transitions, 373 flow [2022-12-12 13:35:58,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 13:35:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 13:35:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 394 transitions. [2022-12-12 13:35:58,377 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6566666666666666 [2022-12-12 13:35:58,378 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2022-12-12 13:35:58,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 80 transitions, 373 flow [2022-12-12 13:35:58,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 325 flow, removed 19 selfloop flow, removed 6 redundant places. [2022-12-12 13:35:58,380 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 80 transitions, 325 flow [2022-12-12 13:35:58,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 48.166666666666664) internal successors, (289), 6 states have internal predecessors, (289), 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) [2022-12-12 13:35:58,380 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:35:58,380 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 13:35:58,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 13:35:58,585 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 [2022-12-12 13:35:58,586 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:35:58,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:35:58,586 INFO L85 PathProgramCache]: Analyzing trace with hash 735425520, now seen corresponding path program 1 times [2022-12-12 13:35:58,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:35:58,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673010484] [2022-12-12 13:35:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:35:58,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:35:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:35:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:35:58,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:35:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673010484] [2022-12-12 13:35:58,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673010484] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:35:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426751240] [2022-12-12 13:35:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:35:58,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:35:58,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:35:58,793 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) [2022-12-12 13:35:58,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 13:35:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:35:58,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 13:35:58,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:35:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:35:58,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:35:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:35:59,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426751240] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:35:59,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:35:59,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2022-12-12 13:35:59,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590547857] [2022-12-12 13:35:59,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:35:59,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 13:35:59,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:35:59,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 13:35:59,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-12 13:35:59,357 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 75 [2022-12-12 13:35:59,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 80 transitions, 325 flow. Second operand has 8 states, 8 states have (on average 56.125) internal successors, (449), 8 states have internal predecessors, (449), 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) [2022-12-12 13:35:59,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:35:59,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 75 [2022-12-12 13:35:59,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:35:59,466 INFO L130 PetriNetUnfolder]: 134/404 cut-off events. [2022-12-12 13:35:59,466 INFO L131 PetriNetUnfolder]: For 331/392 co-relation queries the response was YES. [2022-12-12 13:35:59,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 404 events. 134/404 cut-off events. For 331/392 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1832 event pairs, 51 based on Foata normal form. 1/352 useless extension candidates. Maximal degree in co-relation 584. Up to 206 conditions per place. [2022-12-12 13:35:59,474 INFO L137 encePairwiseOnDemand]: 67/75 looper letters, 31 selfloop transitions, 10 changer transitions 10/106 dead transitions. [2022-12-12 13:35:59,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 106 transitions, 585 flow [2022-12-12 13:35:59,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 13:35:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 13:35:59,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 514 transitions. [2022-12-12 13:35:59,476 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7614814814814815 [2022-12-12 13:35:59,477 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2022-12-12 13:35:59,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 106 transitions, 585 flow [2022-12-12 13:35:59,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 575 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-12-12 13:35:59,481 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 106 transitions, 575 flow [2022-12-12 13:35:59,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 56.125) internal successors, (449), 8 states have internal predecessors, (449), 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) [2022-12-12 13:35:59,482 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:35:59,482 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 13:35:59,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 13:35:59,688 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 [2022-12-12 13:35:59,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:35:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:35:59,688 INFO L85 PathProgramCache]: Analyzing trace with hash 530186364, now seen corresponding path program 2 times [2022-12-12 13:35:59,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:35:59,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354674352] [2022-12-12 13:35:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:35:59,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:35:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:35:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:35:59,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:35:59,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354674352] [2022-12-12 13:35:59,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354674352] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:35:59,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053542370] [2022-12-12 13:35:59,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 13:35:59,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:35:59,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:35:59,797 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) [2022-12-12 13:35:59,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 13:35:59,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 13:35:59,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:35:59,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 13:35:59,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:35:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:35:59,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:35:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:35:59,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053542370] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:35:59,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:35:59,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 11 [2022-12-12 13:35:59,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745809240] [2022-12-12 13:35:59,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:35:59,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 13:36:00,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:00,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 13:36:00,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-12-12 13:36:00,001 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 75 [2022-12-12 13:36:00,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 106 transitions, 575 flow. Second operand has 11 states, 11 states have (on average 54.0) internal successors, (594), 11 states have internal predecessors, (594), 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) [2022-12-12 13:36:00,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:00,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 75 [2022-12-12 13:36:00,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:36:00,140 INFO L130 PetriNetUnfolder]: 157/459 cut-off events. [2022-12-12 13:36:00,140 INFO L131 PetriNetUnfolder]: For 491/564 co-relation queries the response was YES. [2022-12-12 13:36:00,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1734 conditions, 459 events. 157/459 cut-off events. For 491/564 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2130 event pairs, 18 based on Foata normal form. 12/427 useless extension candidates. Maximal degree in co-relation 793. Up to 246 conditions per place. [2022-12-12 13:36:00,143 INFO L137 encePairwiseOnDemand]: 66/75 looper letters, 69 selfloop transitions, 31 changer transitions 13/156 dead transitions. [2022-12-12 13:36:00,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 156 transitions, 1170 flow [2022-12-12 13:36:00,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 13:36:00,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 13:36:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 620 transitions. [2022-12-12 13:36:00,144 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7515151515151515 [2022-12-12 13:36:00,145 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2022-12-12 13:36:00,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 156 transitions, 1170 flow [2022-12-12 13:36:00,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 156 transitions, 1062 flow, removed 54 selfloop flow, removed 0 redundant places. [2022-12-12 13:36:00,146 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 156 transitions, 1062 flow [2022-12-12 13:36:00,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.0) internal successors, (594), 11 states have internal predecessors, (594), 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) [2022-12-12 13:36:00,147 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:36:00,147 INFO L214 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] [2022-12-12 13:36:00,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 13:36:00,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:00,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:36:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:36:00,352 INFO L85 PathProgramCache]: Analyzing trace with hash -161473870, now seen corresponding path program 3 times [2022-12-12 13:36:00,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:36:00,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468890674] [2022-12-12 13:36:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:36:00,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:36:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:00,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:36:00,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468890674] [2022-12-12 13:36:00,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468890674] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:36:00,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012091777] [2022-12-12 13:36:00,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 13:36:00,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:00,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:36:00,483 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) [2022-12-12 13:36:00,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 13:36:00,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 13:36:00,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:36:00,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:36:00,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:36:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:00,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:36:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:00,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012091777] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:36:00,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:36:00,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2022-12-12 13:36:00,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728891319] [2022-12-12 13:36:00,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:36:00,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 13:36:00,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:00,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 13:36:00,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-12-12 13:36:00,722 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:36:00,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 156 transitions, 1062 flow. Second operand has 20 states, 20 states have (on average 52.85) internal successors, (1057), 20 states have internal predecessors, (1057), 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) [2022-12-12 13:36:00,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:00,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:36:00,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:36:01,699 INFO L130 PetriNetUnfolder]: 311/846 cut-off events. [2022-12-12 13:36:01,699 INFO L131 PetriNetUnfolder]: For 1257/1407 co-relation queries the response was YES. [2022-12-12 13:36:01,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 846 events. 311/846 cut-off events. For 1257/1407 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4633 event pairs, 0 based on Foata normal form. 26/786 useless extension candidates. Maximal degree in co-relation 2894. Up to 513 conditions per place. [2022-12-12 13:36:01,705 INFO L137 encePairwiseOnDemand]: 62/75 looper letters, 164 selfloop transitions, 163 changer transitions 32/401 dead transitions. [2022-12-12 13:36:01,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 401 transitions, 4148 flow [2022-12-12 13:36:01,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-12 13:36:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-12-12 13:36:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2984 transitions. [2022-12-12 13:36:01,711 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7233939393939394 [2022-12-12 13:36:01,711 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 73 predicate places. [2022-12-12 13:36:01,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 401 transitions, 4148 flow [2022-12-12 13:36:01,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 401 transitions, 2526 flow, removed 796 selfloop flow, removed 7 redundant places. [2022-12-12 13:36:01,719 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 401 transitions, 2526 flow [2022-12-12 13:36:01,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.85) internal successors, (1057), 20 states have internal predecessors, (1057), 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) [2022-12-12 13:36:01,720 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:36:01,720 INFO L214 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] [2022-12-12 13:36:01,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 13:36:01,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:01,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:36:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:36:01,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1889719500, now seen corresponding path program 4 times [2022-12-12 13:36:01,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:36:01,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977357921] [2022-12-12 13:36:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:36:01,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:36:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:02,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:36:02,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977357921] [2022-12-12 13:36:02,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977357921] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:36:02,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147066515] [2022-12-12 13:36:02,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 13:36:02,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:02,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:36:02,062 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) [2022-12-12 13:36:02,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 13:36:02,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 13:36:02,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:36:02,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 13:36:02,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:36:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:02,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:36:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:02,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147066515] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:36:02,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:36:02,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-12-12 13:36:02,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286030572] [2022-12-12 13:36:02,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:36:02,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 13:36:02,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:02,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 13:36:02,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-12-12 13:36:02,415 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:36:02,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 401 transitions, 2526 flow. Second operand has 26 states, 26 states have (on average 52.61538461538461) internal successors, (1368), 26 states have internal predecessors, (1368), 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) [2022-12-12 13:36:02,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:02,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:36:02,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:36:03,565 INFO L130 PetriNetUnfolder]: 769/2260 cut-off events. [2022-12-12 13:36:03,565 INFO L131 PetriNetUnfolder]: For 2082/2251 co-relation queries the response was YES. [2022-12-12 13:36:03,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7733 conditions, 2260 events. 769/2260 cut-off events. For 2082/2251 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17066 event pairs, 0 based on Foata normal form. 139/2258 useless extension candidates. Maximal degree in co-relation 5353. Up to 530 conditions per place. [2022-12-12 13:36:03,579 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 562 selfloop transitions, 410 changer transitions 101/1115 dead transitions. [2022-12-12 13:36:03,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1115 transitions, 9344 flow [2022-12-12 13:36:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-12 13:36:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-12-12 13:36:03,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3345 transitions. [2022-12-12 13:36:03,584 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7311475409836066 [2022-12-12 13:36:03,584 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 126 predicate places. [2022-12-12 13:36:03,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1115 transitions, 9344 flow [2022-12-12 13:36:03,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 1115 transitions, 8659 flow, removed 336 selfloop flow, removed 3 redundant places. [2022-12-12 13:36:03,605 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 1115 transitions, 8659 flow [2022-12-12 13:36:03,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 52.61538461538461) internal successors, (1368), 26 states have internal predecessors, (1368), 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) [2022-12-12 13:36:03,606 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:36:03,606 INFO L214 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] [2022-12-12 13:36:03,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 13:36:03,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:03,811 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:36:03,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:36:03,812 INFO L85 PathProgramCache]: Analyzing trace with hash 96215416, now seen corresponding path program 5 times [2022-12-12 13:36:03,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:36:03,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004311403] [2022-12-12 13:36:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:36:03,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:36:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:03,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:36:03,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004311403] [2022-12-12 13:36:03,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004311403] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:36:03,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346617745] [2022-12-12 13:36:03,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 13:36:03,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:36:03,955 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) [2022-12-12 13:36:03,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 13:36:04,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 13:36:04,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:36:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 13:36:04,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:36:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:04,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:36:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:04,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346617745] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:36:04,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:36:04,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-12-12 13:36:04,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194965720] [2022-12-12 13:36:04,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:36:04,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 13:36:04,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:04,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 13:36:04,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-12-12 13:36:04,310 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:36:04,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 1115 transitions, 8659 flow. Second operand has 25 states, 25 states have (on average 52.72) internal successors, (1318), 25 states have internal predecessors, (1318), 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) [2022-12-12 13:36:04,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:04,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:36:04,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:36:05,274 INFO L130 PetriNetUnfolder]: 970/2825 cut-off events. [2022-12-12 13:36:05,274 INFO L131 PetriNetUnfolder]: For 3189/3502 co-relation queries the response was YES. [2022-12-12 13:36:05,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11291 conditions, 2825 events. 970/2825 cut-off events. For 3189/3502 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 22908 event pairs, 0 based on Foata normal form. 176/2856 useless extension candidates. Maximal degree in co-relation 8415. Up to 536 conditions per place. [2022-12-12 13:36:05,292 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 586 selfloop transitions, 664 changer transitions 122/1414 dead transitions. [2022-12-12 13:36:05,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 1414 transitions, 13818 flow [2022-12-12 13:36:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-12 13:36:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-12 13:36:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2114 transitions. [2022-12-12 13:36:05,295 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7227350427350427 [2022-12-12 13:36:05,295 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 161 predicate places. [2022-12-12 13:36:05,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 1414 transitions, 13818 flow [2022-12-12 13:36:05,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 1414 transitions, 13080 flow, removed 285 selfloop flow, removed 15 redundant places. [2022-12-12 13:36:05,323 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 1414 transitions, 13080 flow [2022-12-12 13:36:05,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 52.72) internal successors, (1318), 25 states have internal predecessors, (1318), 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) [2022-12-12 13:36:05,323 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:36:05,324 INFO L214 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] [2022-12-12 13:36:05,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 13:36:05,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:05,528 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:36:05,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:36:05,529 INFO L85 PathProgramCache]: Analyzing trace with hash -656998252, now seen corresponding path program 6 times [2022-12-12 13:36:05,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:36:05,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502461177] [2022-12-12 13:36:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:36:05,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:36:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:05,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:36:05,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502461177] [2022-12-12 13:36:05,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502461177] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:36:05,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506602632] [2022-12-12 13:36:05,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 13:36:05,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:05,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:36:05,695 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) [2022-12-12 13:36:05,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 13:36:05,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 13:36:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:36:05,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:36:05,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:36:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:05,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:36:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:06,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506602632] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:36:06,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:36:06,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-12-12 13:36:06,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587609545] [2022-12-12 13:36:06,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:36:06,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 13:36:06,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:06,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 13:36:06,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-12-12 13:36:06,041 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:36:06,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 1414 transitions, 13080 flow. Second operand has 22 states, 22 states have (on average 52.45454545454545) internal successors, (1154), 22 states have internal predecessors, (1154), 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) [2022-12-12 13:36:06,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:06,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:36:06,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:36:07,803 INFO L130 PetriNetUnfolder]: 1282/3799 cut-off events. [2022-12-12 13:36:07,803 INFO L131 PetriNetUnfolder]: For 5520/5957 co-relation queries the response was YES. [2022-12-12 13:36:07,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17386 conditions, 3799 events. 1282/3799 cut-off events. For 5520/5957 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 33304 event pairs, 0 based on Foata normal form. 185/3796 useless extension candidates. Maximal degree in co-relation 10746. Up to 807 conditions per place. [2022-12-12 13:36:07,830 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 776 selfloop transitions, 969 changer transitions 182/1969 dead transitions. [2022-12-12 13:36:07,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 1969 transitions, 22250 flow [2022-12-12 13:36:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-12 13:36:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-12-12 13:36:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 3894 transitions. [2022-12-12 13:36:07,841 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7211111111111111 [2022-12-12 13:36:07,842 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 217 predicate places. [2022-12-12 13:36:07,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 1969 transitions, 22250 flow [2022-12-12 13:36:07,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 1969 transitions, 20763 flow, removed 685 selfloop flow, removed 17 redundant places. [2022-12-12 13:36:07,886 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 1969 transitions, 20763 flow [2022-12-12 13:36:07,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 52.45454545454545) internal successors, (1154), 22 states have internal predecessors, (1154), 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) [2022-12-12 13:36:07,888 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:36:07,888 INFO L214 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] [2022-12-12 13:36:07,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 13:36:08,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:08,093 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:36:08,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:36:08,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1512069294, now seen corresponding path program 7 times [2022-12-12 13:36:08,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:36:08,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847138961] [2022-12-12 13:36:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:36:08,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:36:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:08,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:36:08,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847138961] [2022-12-12 13:36:08,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847138961] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:36:08,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281019758] [2022-12-12 13:36:08,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 13:36:08,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:08,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:36:08,213 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) [2022-12-12 13:36:08,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 13:36:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:08,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:36:08,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:36:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:08,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:36:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:08,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281019758] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:36:08,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:36:08,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-12-12 13:36:08,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453507570] [2022-12-12 13:36:08,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:36:08,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 13:36:08,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:08,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 13:36:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-12-12 13:36:08,496 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:36:08,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 1969 transitions, 20763 flow. Second operand has 22 states, 22 states have (on average 52.45454545454545) internal successors, (1154), 22 states have internal predecessors, (1154), 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) [2022-12-12 13:36:08,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:08,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:36:08,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:36:09,886 INFO L130 PetriNetUnfolder]: 1387/4224 cut-off events. [2022-12-12 13:36:09,887 INFO L131 PetriNetUnfolder]: For 7487/7995 co-relation queries the response was YES. [2022-12-12 13:36:09,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21057 conditions, 4224 events. 1387/4224 cut-off events. For 7487/7995 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 38564 event pairs, 0 based on Foata normal form. 189/4255 useless extension candidates. Maximal degree in co-relation 8457. Up to 845 conditions per place. [2022-12-12 13:36:09,914 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 1013 selfloop transitions, 927 changer transitions 258/2240 dead transitions. [2022-12-12 13:36:09,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 2240 transitions, 28238 flow [2022-12-12 13:36:09,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-12 13:36:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-12 13:36:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2229 transitions. [2022-12-12 13:36:09,917 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7248780487804878 [2022-12-12 13:36:09,917 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 240 predicate places. [2022-12-12 13:36:09,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 2240 transitions, 28238 flow [2022-12-12 13:36:09,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 2240 transitions, 27031 flow, removed 407 selfloop flow, removed 13 redundant places. [2022-12-12 13:36:09,969 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 2240 transitions, 27031 flow [2022-12-12 13:36:09,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 52.45454545454545) internal successors, (1154), 22 states have internal predecessors, (1154), 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) [2022-12-12 13:36:09,969 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:36:09,969 INFO L214 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] [2022-12-12 13:36:09,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-12 13:36:10,174 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,SelfDestructingSolverStorable9 [2022-12-12 13:36:10,174 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:36:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:36:10,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2075817942, now seen corresponding path program 8 times [2022-12-12 13:36:10,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:36:10,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895471216] [2022-12-12 13:36:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:36:10,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:36:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:10,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:36:10,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895471216] [2022-12-12 13:36:10,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895471216] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:36:10,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71613845] [2022-12-12 13:36:10,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 13:36:10,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:10,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:36:10,376 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) [2022-12-12 13:36:10,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 13:36:10,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 13:36:10,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:36:10,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:36:10,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:36:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:10,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:36:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:10,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71613845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:36:10,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:36:10,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-12-12 13:36:10,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432204250] [2022-12-12 13:36:10,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:36:10,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 13:36:10,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:10,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 13:36:10,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-12-12 13:36:10,714 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:36:10,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 2240 transitions, 27031 flow. Second operand has 24 states, 24 states have (on average 52.291666666666664) internal successors, (1255), 24 states have internal predecessors, (1255), 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) [2022-12-12 13:36:10,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:10,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:36:10,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:36:11,772 INFO L130 PetriNetUnfolder]: 1402/4272 cut-off events. [2022-12-12 13:36:11,772 INFO L131 PetriNetUnfolder]: For 9385/9921 co-relation queries the response was YES. [2022-12-12 13:36:11,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23584 conditions, 4272 events. 1402/4272 cut-off events. For 9385/9921 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 39084 event pairs, 0 based on Foata normal form. 60/4184 useless extension candidates. Maximal degree in co-relation 17180. Up to 864 conditions per place. [2022-12-12 13:36:11,799 INFO L137 encePairwiseOnDemand]: 64/75 looper letters, 1227 selfloop transitions, 739 changer transitions 265/2273 dead transitions. [2022-12-12 13:36:11,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 2273 transitions, 31822 flow [2022-12-12 13:36:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 13:36:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 13:36:11,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1150 transitions. [2022-12-12 13:36:11,800 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7301587301587301 [2022-12-12 13:36:11,801 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 247 predicate places. [2022-12-12 13:36:11,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 2273 transitions, 31822 flow [2022-12-12 13:36:11,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 2273 transitions, 29778 flow, removed 911 selfloop flow, removed 10 redundant places. [2022-12-12 13:36:11,856 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 2273 transitions, 29778 flow [2022-12-12 13:36:11,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.291666666666664) internal successors, (1255), 24 states have internal predecessors, (1255), 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) [2022-12-12 13:36:11,856 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:36:11,856 INFO L214 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] [2022-12-12 13:36:11,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-12 13:36:12,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:12,061 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:36:12,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:36:12,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1063621758, now seen corresponding path program 9 times [2022-12-12 13:36:12,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:36:12,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646944144] [2022-12-12 13:36:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:36:12,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:36:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:12,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:36:12,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646944144] [2022-12-12 13:36:12,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646944144] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:36:12,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950400618] [2022-12-12 13:36:12,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 13:36:12,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:12,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:36:12,189 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) [2022-12-12 13:36:12,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 13:36:12,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-12 13:36:12,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:36:12,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:36:12,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:36:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:12,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:36:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:12,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950400618] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:36:12,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:36:12,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-12-12 13:36:12,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004849777] [2022-12-12 13:36:12,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:36:12,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 13:36:12,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:12,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 13:36:12,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-12-12 13:36:12,459 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:36:12,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 2273 transitions, 29778 flow. Second operand has 23 states, 23 states have (on average 52.34782608695652) internal successors, (1204), 23 states have internal predecessors, (1204), 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) [2022-12-12 13:36:12,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:12,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:36:12,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:36:14,371 INFO L130 PetriNetUnfolder]: 1919/5898 cut-off events. [2022-12-12 13:36:14,372 INFO L131 PetriNetUnfolder]: For 14682/15406 co-relation queries the response was YES. [2022-12-12 13:36:14,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34521 conditions, 5898 events. 1919/5898 cut-off events. For 14682/15406 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 57958 event pairs, 0 based on Foata normal form. 177/5925 useless extension candidates. Maximal degree in co-relation 14043. Up to 1415 conditions per place. [2022-12-12 13:36:14,410 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 1472 selfloop transitions, 1244 changer transitions 340/3098 dead transitions. [2022-12-12 13:36:14,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 3098 transitions, 46748 flow [2022-12-12 13:36:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-12 13:36:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-12 13:36:14,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2413 transitions. [2022-12-12 13:36:14,413 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7312121212121212 [2022-12-12 13:36:14,413 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 280 predicate places. [2022-12-12 13:36:14,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 3098 transitions, 46748 flow [2022-12-12 13:36:14,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 3098 transitions, 43317 flow, removed 1044 selfloop flow, removed 18 redundant places. [2022-12-12 13:36:14,489 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 3098 transitions, 43317 flow [2022-12-12 13:36:14,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 52.34782608695652) internal successors, (1204), 23 states have internal predecessors, (1204), 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) [2022-12-12 13:36:14,490 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:36:14,490 INFO L214 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] [2022-12-12 13:36:14,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-12 13:36:14,695 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,SelfDestructingSolverStorable11 [2022-12-12 13:36:14,695 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:36:14,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:36:14,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1247533672, now seen corresponding path program 10 times [2022-12-12 13:36:14,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:36:14,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537189162] [2022-12-12 13:36:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:36:14,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:36:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:14,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:36:14,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537189162] [2022-12-12 13:36:14,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537189162] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:36:14,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228670625] [2022-12-12 13:36:14,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 13:36:14,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:14,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:36:14,809 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) [2022-12-12 13:36:14,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 13:36:14,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 13:36:14,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:36:14,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:36:14,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:36:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:14,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:36:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:15,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228670625] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:36:15,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:36:15,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-12-12 13:36:15,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645944186] [2022-12-12 13:36:15,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:36:15,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 13:36:15,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:15,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 13:36:15,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-12-12 13:36:15,129 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:36:15,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 3098 transitions, 43317 flow. Second operand has 23 states, 23 states have (on average 52.52173913043478) internal successors, (1208), 23 states have internal predecessors, (1208), 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) [2022-12-12 13:36:15,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:15,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:36:15,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:36:17,362 INFO L130 PetriNetUnfolder]: 1895/5837 cut-off events. [2022-12-12 13:36:17,363 INFO L131 PetriNetUnfolder]: For 16568/17555 co-relation queries the response was YES. [2022-12-12 13:36:17,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36493 conditions, 5837 events. 1895/5837 cut-off events. For 16568/17555 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 57437 event pairs, 0 based on Foata normal form. 302/5984 useless extension candidates. Maximal degree in co-relation 14520. Up to 1358 conditions per place. [2022-12-12 13:36:17,438 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 1229 selfloop transitions, 1476 changer transitions 346/3093 dead transitions. [2022-12-12 13:36:17,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 3093 transitions, 49539 flow [2022-12-12 13:36:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-12 13:36:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-12-12 13:36:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3397 transitions. [2022-12-12 13:36:17,443 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.718941798941799 [2022-12-12 13:36:17,444 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 321 predicate places. [2022-12-12 13:36:17,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 3093 transitions, 49539 flow [2022-12-12 13:36:17,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 3093 transitions, 47100 flow, removed 787 selfloop flow, removed 39 redundant places. [2022-12-12 13:36:17,568 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 3093 transitions, 47100 flow [2022-12-12 13:36:17,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 52.52173913043478) internal successors, (1208), 23 states have internal predecessors, (1208), 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) [2022-12-12 13:36:17,568 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:36:17,568 INFO L214 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] [2022-12-12 13:36:17,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-12 13:36:17,773 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,SelfDestructingSolverStorable12 [2022-12-12 13:36:17,773 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:36:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:36:17,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1347055974, now seen corresponding path program 11 times [2022-12-12 13:36:17,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:36:17,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160916260] [2022-12-12 13:36:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:36:17,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:36:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:17,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:36:17,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160916260] [2022-12-12 13:36:17,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160916260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:36:17,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606189173] [2022-12-12 13:36:17,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 13:36:17,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:17,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:36:17,901 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) [2022-12-12 13:36:17,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 13:36:17,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 13:36:17,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:36:17,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 13:36:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:36:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:18,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:36:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:18,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606189173] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:36:18,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:36:18,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-12-12 13:36:18,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647979122] [2022-12-12 13:36:18,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:36:18,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 13:36:18,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:18,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 13:36:18,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-12-12 13:36:18,165 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:36:18,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 3093 transitions, 47100 flow. Second operand has 22 states, 22 states have (on average 52.13636363636363) internal successors, (1147), 22 states have internal predecessors, (1147), 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) [2022-12-12 13:36:18,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:18,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:36:18,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:36:20,996 INFO L130 PetriNetUnfolder]: 2712/8039 cut-off events. [2022-12-12 13:36:20,996 INFO L131 PetriNetUnfolder]: For 25212/26228 co-relation queries the response was YES. [2022-12-12 13:36:21,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55124 conditions, 8039 events. 2712/8039 cut-off events. For 25212/26228 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 83047 event pairs, 0 based on Foata normal form. 253/8108 useless extension candidates. Maximal degree in co-relation 39313. Up to 2166 conditions per place. [2022-12-12 13:36:21,046 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 2198 selfloop transitions, 1636 changer transitions 473/4349 dead transitions. [2022-12-12 13:36:21,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 4349 transitions, 75868 flow [2022-12-12 13:36:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-12 13:36:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-12-12 13:36:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3281 transitions. [2022-12-12 13:36:21,050 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7171584699453551 [2022-12-12 13:36:21,050 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 342 predicate places. [2022-12-12 13:36:21,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 4349 transitions, 75868 flow [2022-12-12 13:36:21,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 4349 transitions, 74719 flow, removed 358 selfloop flow, removed 11 redundant places. [2022-12-12 13:36:21,171 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 4349 transitions, 74719 flow [2022-12-12 13:36:21,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 52.13636363636363) internal successors, (1147), 22 states have internal predecessors, (1147), 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) [2022-12-12 13:36:21,172 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:36:21,172 INFO L214 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] [2022-12-12 13:36:21,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-12 13:36:21,383 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,SelfDestructingSolverStorable13 [2022-12-12 13:36:21,384 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:36:21,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:36:21,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2101297494, now seen corresponding path program 12 times [2022-12-12 13:36:21,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:36:21,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436965368] [2022-12-12 13:36:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:36:21,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:36:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:21,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:36:21,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436965368] [2022-12-12 13:36:21,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436965368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:36:21,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153626031] [2022-12-12 13:36:21,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 13:36:21,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:21,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:36:21,583 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) [2022-12-12 13:36:21,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-12 13:36:21,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 13:36:21,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:36:21,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:36:21,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:36:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:21,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:36:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:21,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153626031] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:36:21,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:36:21,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-12-12 13:36:21,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286872681] [2022-12-12 13:36:21,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:36:21,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 13:36:21,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:21,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 13:36:21,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-12-12 13:36:21,861 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:36:21,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 4349 transitions, 74719 flow. Second operand has 23 states, 23 states have (on average 52.34782608695652) internal successors, (1204), 23 states have internal predecessors, (1204), 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) [2022-12-12 13:36:21,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:21,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:36:21,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:36:26,175 INFO L130 PetriNetUnfolder]: 3615/11073 cut-off events. [2022-12-12 13:36:26,175 INFO L131 PetriNetUnfolder]: For 41196/42460 co-relation queries the response was YES. [2022-12-12 13:36:26,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80566 conditions, 11073 events. 3615/11073 cut-off events. For 41196/42460 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 122831 event pairs, 0 based on Foata normal form. 280/11140 useless extension candidates. Maximal degree in co-relation 57138. Up to 3007 conditions per place. [2022-12-12 13:36:26,244 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 3341 selfloop transitions, 1728 changer transitions 670/5781 dead transitions. [2022-12-12 13:36:26,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 5781 transitions, 110595 flow [2022-12-12 13:36:26,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-12 13:36:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-12 13:36:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2480 transitions. [2022-12-12 13:36:26,247 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7348148148148148 [2022-12-12 13:36:26,248 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 375 predicate places. [2022-12-12 13:36:26,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 5781 transitions, 110595 flow [2022-12-12 13:36:26,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 5781 transitions, 108467 flow, removed 986 selfloop flow, removed 12 redundant places. [2022-12-12 13:36:26,442 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 5781 transitions, 108467 flow [2022-12-12 13:36:26,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 52.34782608695652) internal successors, (1204), 23 states have internal predecessors, (1204), 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) [2022-12-12 13:36:26,442 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:36:26,442 INFO L214 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] [2022-12-12 13:36:26,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-12 13:36:26,646 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,SelfDestructingSolverStorable14 [2022-12-12 13:36:26,647 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:36:26,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:36:26,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1397850524, now seen corresponding path program 13 times [2022-12-12 13:36:26,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:36:26,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387154551] [2022-12-12 13:36:26,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:36:26,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:36:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:26,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:36:26,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387154551] [2022-12-12 13:36:26,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387154551] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:36:26,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679193549] [2022-12-12 13:36:26,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 13:36:26,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:26,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:36:26,738 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) [2022-12-12 13:36:26,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-12 13:36:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:26,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:36:26,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:36:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:26,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:36:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:27,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679193549] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:36:27,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:36:27,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-12-12 13:36:27,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835603802] [2022-12-12 13:36:27,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:36:27,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 13:36:27,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:27,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 13:36:27,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-12-12 13:36:27,030 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:36:27,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 5781 transitions, 108467 flow. Second operand has 23 states, 23 states have (on average 52.34782608695652) internal successors, (1204), 23 states have internal predecessors, (1204), 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) [2022-12-12 13:36:27,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:27,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:36:27,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:36:33,406 INFO L130 PetriNetUnfolder]: 3645/11353 cut-off events. [2022-12-12 13:36:33,406 INFO L131 PetriNetUnfolder]: For 49924/51557 co-relation queries the response was YES. [2022-12-12 13:36:33,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88920 conditions, 11353 events. 3645/11353 cut-off events. For 49924/51557 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 127391 event pairs, 0 based on Foata normal form. 468/11595 useless extension candidates. Maximal degree in co-relation 62400. Up to 2963 conditions per place. [2022-12-12 13:36:33,473 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 2659 selfloop transitions, 2473 changer transitions 712/5886 dead transitions. [2022-12-12 13:36:33,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 5886 transitions, 122299 flow [2022-12-12 13:36:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-12 13:36:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-12-12 13:36:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3220 transitions. [2022-12-12 13:36:33,476 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.727683615819209 [2022-12-12 13:36:33,476 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 419 predicate places. [2022-12-12 13:36:33,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 5886 transitions, 122299 flow [2022-12-12 13:36:33,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 5886 transitions, 119628 flow, removed 891 selfloop flow, removed 33 redundant places. [2022-12-12 13:36:33,671 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 5886 transitions, 119628 flow [2022-12-12 13:36:33,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 52.34782608695652) internal successors, (1204), 23 states have internal predecessors, (1204), 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) [2022-12-12 13:36:33,672 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:36:33,672 INFO L214 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] [2022-12-12 13:36:33,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 13:36:33,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:33,874 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:36:33,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:36:33,874 INFO L85 PathProgramCache]: Analyzing trace with hash -736540104, now seen corresponding path program 14 times [2022-12-12 13:36:33,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:36:33,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26770636] [2022-12-12 13:36:33,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:36:33,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:36:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:33,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:36:33,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26770636] [2022-12-12 13:36:33,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26770636] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:36:33,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090177724] [2022-12-12 13:36:33,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 13:36:33,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:33,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:36:33,984 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) [2022-12-12 13:36:34,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 13:36:34,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 13:36:34,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:36:34,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:36:34,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:36:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:34,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:36:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:34,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090177724] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:36:34,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:36:34,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-12-12 13:36:34,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375107756] [2022-12-12 13:36:34,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:36:34,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 13:36:34,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:34,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 13:36:34,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-12-12 13:36:34,338 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:36:34,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 5886 transitions, 119628 flow. Second operand has 24 states, 24 states have (on average 52.291666666666664) internal successors, (1255), 24 states have internal predecessors, (1255), 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) [2022-12-12 13:36:34,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:34,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:36:34,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:36:43,425 INFO L130 PetriNetUnfolder]: 5096/16303 cut-off events. [2022-12-12 13:36:43,425 INFO L131 PetriNetUnfolder]: For 82385/84430 co-relation queries the response was YES. [2022-12-12 13:36:43,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134948 conditions, 16303 events. 5096/16303 cut-off events. For 82385/84430 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 195999 event pairs, 0 based on Foata normal form. 435/16432 useless extension candidates. Maximal degree in co-relation 101536. Up to 4151 conditions per place. [2022-12-12 13:36:43,553 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 5131 selfloop transitions, 2238 changer transitions 1065/8476 dead transitions. [2022-12-12 13:36:43,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 8476 transitions, 189633 flow [2022-12-12 13:36:43,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-12 13:36:43,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-12-12 13:36:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3096 transitions. [2022-12-12 13:36:43,555 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7242105263157895 [2022-12-12 13:36:43,556 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 442 predicate places. [2022-12-12 13:36:43,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 8476 transitions, 189633 flow [2022-12-12 13:36:43,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 8476 transitions, 187231 flow, removed 934 selfloop flow, removed 13 redundant places. [2022-12-12 13:36:43,874 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 8476 transitions, 187231 flow [2022-12-12 13:36:43,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.291666666666664) internal successors, (1255), 24 states have internal predecessors, (1255), 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) [2022-12-12 13:36:43,875 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:36:43,875 INFO L214 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] [2022-12-12 13:36:43,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 13:36:44,079 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,SelfDestructingSolverStorable16 [2022-12-12 13:36:44,079 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:36:44,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:36:44,079 INFO L85 PathProgramCache]: Analyzing trace with hash 41265068, now seen corresponding path program 15 times [2022-12-12 13:36:44,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:36:44,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831797699] [2022-12-12 13:36:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:36:44,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:36:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:44,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:36:44,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831797699] [2022-12-12 13:36:44,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831797699] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:36:44,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708832982] [2022-12-12 13:36:44,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 13:36:44,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:44,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:36:44,167 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) [2022-12-12 13:36:44,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-12 13:36:44,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-12 13:36:44,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:36:44,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:36:44,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:36:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:44,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:36:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:44,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708832982] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:36:44,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:36:44,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-12-12 13:36:44,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35706368] [2022-12-12 13:36:44,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:36:44,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 13:36:44,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:44,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 13:36:44,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-12-12 13:36:44,421 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:36:44,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 8476 transitions, 187231 flow. Second operand has 24 states, 24 states have (on average 52.291666666666664) internal successors, (1255), 24 states have internal predecessors, (1255), 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) [2022-12-12 13:36:44,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:44,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:36:44,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:36:57,958 INFO L130 PetriNetUnfolder]: 5103/16311 cut-off events. [2022-12-12 13:36:57,959 INFO L131 PetriNetUnfolder]: For 95185/97562 co-relation queries the response was YES. [2022-12-12 13:36:57,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145064 conditions, 16311 events. 5103/16311 cut-off events. For 95185/97562 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 195970 event pairs, 0 based on Foata normal form. 447/16456 useless extension candidates. Maximal degree in co-relation 109073. Up to 6779 conditions per place. [2022-12-12 13:36:58,073 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 6440 selfloop transitions, 914 changer transitions 1083/8479 dead transitions. [2022-12-12 13:36:58,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 8479 transitions, 204182 flow [2022-12-12 13:36:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 13:36:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 13:36:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 979 transitions. [2022-12-12 13:36:58,075 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7251851851851852 [2022-12-12 13:36:58,076 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 446 predicate places. [2022-12-12 13:36:58,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 8479 transitions, 204182 flow [2022-12-12 13:36:58,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 8479 transitions, 192617 flow, removed 5747 selfloop flow, removed 7 redundant places. [2022-12-12 13:36:58,421 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 8479 transitions, 192617 flow [2022-12-12 13:36:58,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.291666666666664) internal successors, (1255), 24 states have internal predecessors, (1255), 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) [2022-12-12 13:36:58,422 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:36:58,422 INFO L214 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] [2022-12-12 13:36:58,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-12 13:36:58,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-12 13:36:58,626 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:36:58,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:36:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash -203708022, now seen corresponding path program 16 times [2022-12-12 13:36:58,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:36:58,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688819300] [2022-12-12 13:36:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:36:58,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:36:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:36:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:58,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:36:58,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688819300] [2022-12-12 13:36:58,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688819300] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:36:58,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34766660] [2022-12-12 13:36:58,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 13:36:58,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:36:58,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:36:58,728 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) [2022-12-12 13:36:58,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-12 13:36:58,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 13:36:58,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:36:58,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:36:58,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:36:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:58,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:36:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:36:58,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34766660] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:36:58,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:36:58,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-12-12 13:36:58,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498544834] [2022-12-12 13:36:58,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:36:58,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 13:36:58,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:36:58,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 13:36:58,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-12-12 13:36:58,982 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:36:58,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 8479 transitions, 192617 flow. Second operand has 24 states, 24 states have (on average 52.291666666666664) internal successors, (1255), 24 states have internal predecessors, (1255), 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) [2022-12-12 13:36:58,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:36:58,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:36:58,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:37:12,875 INFO L130 PetriNetUnfolder]: 5102/16347 cut-off events. [2022-12-12 13:37:12,875 INFO L131 PetriNetUnfolder]: For 103612/106357 co-relation queries the response was YES. [2022-12-12 13:37:12,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149133 conditions, 16347 events. 5102/16347 cut-off events. For 103612/106357 co-relation queries the response was YES. Maximal size of possible extension queue 1053. Compared 196872 event pairs, 0 based on Foata normal form. 464/16591 useless extension candidates. Maximal degree in co-relation 111963. Up to 6779 conditions per place. [2022-12-12 13:37:12,983 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 6441 selfloop transitions, 911 changer transitions 1091/8485 dead transitions. [2022-12-12 13:37:12,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 8485 transitions, 209644 flow [2022-12-12 13:37:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 13:37:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 13:37:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1134 transitions. [2022-12-12 13:37:12,985 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.72 [2022-12-12 13:37:12,985 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 459 predicate places. [2022-12-12 13:37:12,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 8485 transitions, 209644 flow [2022-12-12 13:37:13,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 8485 transitions, 191946 flow, removed 8403 selfloop flow, removed 12 redundant places. [2022-12-12 13:37:13,386 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 8485 transitions, 191946 flow [2022-12-12 13:37:13,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.291666666666664) internal successors, (1255), 24 states have internal predecessors, (1255), 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) [2022-12-12 13:37:13,386 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:37:13,387 INFO L214 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] [2022-12-12 13:37:13,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-12 13:37:13,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:37:13,591 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:37:13,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:37:13,591 INFO L85 PathProgramCache]: Analyzing trace with hash -154700262, now seen corresponding path program 17 times [2022-12-12 13:37:13,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:37:13,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175625836] [2022-12-12 13:37:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:37:13,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:37:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:37:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:37:13,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:37:13,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175625836] [2022-12-12 13:37:13,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175625836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:37:13,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566623687] [2022-12-12 13:37:13,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 13:37:13,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:37:13,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:37:13,694 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) [2022-12-12 13:37:13,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-12 13:37:13,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 13:37:13,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:37:13,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 13:37:13,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:37:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:37:13,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:37:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:37:13,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566623687] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:37:13,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:37:13,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-12-12 13:37:13,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819708744] [2022-12-12 13:37:13,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:37:13,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 13:37:13,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:37:13,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 13:37:13,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-12-12 13:37:13,942 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:37:13,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 8485 transitions, 191946 flow. Second operand has 22 states, 22 states have (on average 52.18181818181818) internal successors, (1148), 22 states have internal predecessors, (1148), 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) [2022-12-12 13:37:13,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:37:13,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:37:13,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:37:31,608 INFO L130 PetriNetUnfolder]: 6342/20164 cut-off events. [2022-12-12 13:37:31,608 INFO L131 PetriNetUnfolder]: For 124997/128046 co-relation queries the response was YES. [2022-12-12 13:37:31,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183632 conditions, 20164 events. 6342/20164 cut-off events. For 124997/128046 co-relation queries the response was YES. Maximal size of possible extension queue 1329. Compared 251587 event pairs, 0 based on Foata normal form. 699/20731 useless extension candidates. Maximal degree in co-relation 132462. Up to 4882 conditions per place. [2022-12-12 13:37:31,769 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 4472 selfloop transitions, 4686 changer transitions 1383/10583 dead transitions. [2022-12-12 13:37:31,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 10583 transitions, 260293 flow [2022-12-12 13:37:31,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-12 13:37:31,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-12-12 13:37:31,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3444 transitions. [2022-12-12 13:37:31,771 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7175 [2022-12-12 13:37:31,772 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 510 predicate places. [2022-12-12 13:37:31,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 10583 transitions, 260293 flow [2022-12-12 13:37:32,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 10583 transitions, 254300 flow, removed 1976 selfloop flow, removed 21 redundant places. [2022-12-12 13:37:32,466 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 10583 transitions, 254300 flow [2022-12-12 13:37:32,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 52.18181818181818) internal successors, (1148), 22 states have internal predecessors, (1148), 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) [2022-12-12 13:37:32,467 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:37:32,467 INFO L214 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] [2022-12-12 13:37:32,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-12 13:37:32,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:37:32,672 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:37:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:37:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1678063478, now seen corresponding path program 18 times [2022-12-12 13:37:32,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:37:32,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909104497] [2022-12-12 13:37:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:37:32,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:37:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:37:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:37:32,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:37:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909104497] [2022-12-12 13:37:32,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909104497] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:37:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7937359] [2022-12-12 13:37:32,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 13:37:32,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:37:32,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:37:32,783 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) [2022-12-12 13:37:32,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-12 13:37:32,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 13:37:32,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:37:32,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 13:37:32,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:37:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:37:32,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:37:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:37:33,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7937359] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:37:33,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:37:33,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-12-12 13:37:33,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828637792] [2022-12-12 13:37:33,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:37:33,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 13:37:33,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:37:33,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 13:37:33,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-12-12 13:37:33,081 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:37:33,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 10583 transitions, 254300 flow. Second operand has 26 states, 26 states have (on average 52.46153846153846) internal successors, (1364), 26 states have internal predecessors, (1364), 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) [2022-12-12 13:37:33,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:37:33,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:37:33,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:37:58,137 INFO L130 PetriNetUnfolder]: 6825/21514 cut-off events. [2022-12-12 13:37:58,137 INFO L131 PetriNetUnfolder]: For 142379/145457 co-relation queries the response was YES. [2022-12-12 13:37:58,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208861 conditions, 21514 events. 6825/21514 cut-off events. For 142379/145457 co-relation queries the response was YES. Maximal size of possible extension queue 1404. Compared 270452 event pairs, 0 based on Foata normal form. 917/22291 useless extension candidates. Maximal degree in co-relation 158343. Up to 7174 conditions per place. [2022-12-12 13:37:58,293 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 5993 selfloop transitions, 3921 changer transitions 1467/11423 dead transitions. [2022-12-12 13:37:58,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 11423 transitions, 297681 flow [2022-12-12 13:37:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-12 13:37:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-12 13:37:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1841 transitions. [2022-12-12 13:37:58,295 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7438383838383839 [2022-12-12 13:37:58,296 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 521 predicate places. [2022-12-12 13:37:58,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 11423 transitions, 297681 flow [2022-12-12 13:37:59,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 11423 transitions, 292552 flow, removed 2562 selfloop flow, removed 2 redundant places. [2022-12-12 13:37:59,032 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 11423 transitions, 292552 flow [2022-12-12 13:37:59,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 52.46153846153846) internal successors, (1364), 26 states have internal predecessors, (1364), 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) [2022-12-12 13:37:59,033 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:37:59,033 INFO L214 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] [2022-12-12 13:37:59,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-12 13:37:59,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:37:59,235 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:37:59,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:37:59,236 INFO L85 PathProgramCache]: Analyzing trace with hash -244322036, now seen corresponding path program 19 times [2022-12-12 13:37:59,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:37:59,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463291095] [2022-12-12 13:37:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:37:59,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:37:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:37:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:37:59,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:37:59,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463291095] [2022-12-12 13:37:59,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463291095] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:37:59,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174258591] [2022-12-12 13:37:59,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 13:37:59,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:37:59,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:37:59,352 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) [2022-12-12 13:37:59,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-12 13:37:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:37:59,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:37:59,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:37:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:37:59,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:37:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 13:37:59,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174258591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:37:59,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:37:59,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 13:37:59,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412072083] [2022-12-12 13:37:59,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:37:59,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 13:37:59,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:37:59,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 13:37:59,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-12-12 13:37:59,640 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:37:59,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 11423 transitions, 292552 flow. Second operand has 22 states, 22 states have (on average 52.45454545454545) internal successors, (1154), 22 states have internal predecessors, (1154), 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) [2022-12-12 13:37:59,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:37:59,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:37:59,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:38:31,729 INFO L130 PetriNetUnfolder]: 7176/22651 cut-off events. [2022-12-12 13:38:31,729 INFO L131 PetriNetUnfolder]: For 170088/173555 co-relation queries the response was YES. [2022-12-12 13:38:31,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232113 conditions, 22651 events. 7176/22651 cut-off events. For 170088/173555 co-relation queries the response was YES. Maximal size of possible extension queue 1448. Compared 286924 event pairs, 0 based on Foata normal form. 600/23102 useless extension candidates. Maximal degree in co-relation 150743. Up to 8745 conditions per place. [2022-12-12 13:38:31,903 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 8732 selfloop transitions, 1684 changer transitions 1526/11984 dead transitions. [2022-12-12 13:38:31,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 11984 transitions, 330823 flow [2022-12-12 13:38:31,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-12 13:38:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-12 13:38:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1747 transitions. [2022-12-12 13:38:31,905 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7279166666666667 [2022-12-12 13:38:31,905 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 550 predicate places. [2022-12-12 13:38:31,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 11984 transitions, 330823 flow [2022-12-12 13:38:32,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 11984 transitions, 315077 flow, removed 7483 selfloop flow, removed 7 redundant places. [2022-12-12 13:38:32,890 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 11984 transitions, 315077 flow [2022-12-12 13:38:32,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 52.45454545454545) internal successors, (1154), 22 states have internal predecessors, (1154), 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) [2022-12-12 13:38:32,891 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:38:32,891 INFO L214 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] [2022-12-12 13:38:32,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-12 13:38:33,096 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,SelfDestructingSolverStorable21 [2022-12-12 13:38:33,096 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:38:33,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:38:33,097 INFO L85 PathProgramCache]: Analyzing trace with hash 291800268, now seen corresponding path program 20 times [2022-12-12 13:38:33,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:38:33,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464059224] [2022-12-12 13:38:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:38:33,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:38:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:38:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:38:33,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:38:33,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464059224] [2022-12-12 13:38:33,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464059224] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:38:33,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724829228] [2022-12-12 13:38:33,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 13:38:33,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:38:33,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:38:33,201 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 13:38:33,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-12 13:38:33,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 13:38:33,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:38:33,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:38:33,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:38:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:38:33,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:38:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 13:38:33,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724829228] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:38:33,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:38:33,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 13:38:33,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64991981] [2022-12-12 13:38:33,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:38:33,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 13:38:33,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:38:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 13:38:33,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-12-12 13:38:33,462 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:38:33,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 11984 transitions, 315077 flow. Second operand has 22 states, 22 states have (on average 52.5) internal successors, (1155), 22 states have internal predecessors, (1155), 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) [2022-12-12 13:38:33,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:38:33,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:38:33,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:39:09,948 INFO L130 PetriNetUnfolder]: 7145/22545 cut-off events. [2022-12-12 13:39:09,948 INFO L131 PetriNetUnfolder]: For 185798/189178 co-relation queries the response was YES. [2022-12-12 13:39:09,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237174 conditions, 22545 events. 7145/22545 cut-off events. For 185798/189178 co-relation queries the response was YES. Maximal size of possible extension queue 1443. Compared 285339 event pairs, 0 based on Foata normal form. 871/23269 useless extension candidates. Maximal degree in co-relation 153934. Up to 8823 conditions per place. [2022-12-12 13:39:10,121 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 6285 selfloop transitions, 4100 changer transitions 1532/11959 dead transitions. [2022-12-12 13:39:10,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 11959 transitions, 338526 flow [2022-12-12 13:39:10,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-12 13:39:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-12 13:39:10,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1865 transitions. [2022-12-12 13:39:10,123 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7313725490196078 [2022-12-12 13:39:10,123 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 574 predicate places. [2022-12-12 13:39:10,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 640 places, 11959 transitions, 338526 flow [2022-12-12 13:39:11,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 618 places, 11959 transitions, 329338 flow, removed 4218 selfloop flow, removed 22 redundant places. [2022-12-12 13:39:11,034 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 11959 transitions, 329338 flow [2022-12-12 13:39:11,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 52.5) internal successors, (1155), 22 states have internal predecessors, (1155), 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) [2022-12-12 13:39:11,035 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:39:11,035 INFO L214 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] [2022-12-12 13:39:11,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-12 13:39:11,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-12 13:39:11,240 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:39:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:39:11,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1848933740, now seen corresponding path program 21 times [2022-12-12 13:39:11,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:39:11,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100085002] [2022-12-12 13:39:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:39:11,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:39:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:39:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:39:11,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:39:11,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100085002] [2022-12-12 13:39:11,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100085002] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:39:11,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203937851] [2022-12-12 13:39:11,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 13:39:11,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:39:11,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:39:11,356 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 13:39:11,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-12 13:39:11,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 13:39:11,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:39:11,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:39:11,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:39:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:39:11,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:39:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:39:11,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203937851] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:39:11,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:39:11,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-12-12 13:39:11,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776948279] [2022-12-12 13:39:11,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:39:11,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 13:39:11,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:39:11,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 13:39:11,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-12-12 13:39:11,645 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:39:11,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 11959 transitions, 329338 flow. Second operand has 24 states, 24 states have (on average 52.291666666666664) internal successors, (1255), 24 states have internal predecessors, (1255), 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) [2022-12-12 13:39:11,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:39:11,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:39:11,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:39:48,860 INFO L130 PetriNetUnfolder]: 7151/22570 cut-off events. [2022-12-12 13:39:48,861 INFO L131 PetriNetUnfolder]: For 202559/205851 co-relation queries the response was YES. [2022-12-12 13:39:48,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247652 conditions, 22570 events. 7151/22570 cut-off events. For 202559/205851 co-relation queries the response was YES. Maximal size of possible extension queue 1440. Compared 285514 event pairs, 0 based on Foata normal form. 622/23045 useless extension candidates. Maximal degree in co-relation 128883. Up to 9371 conditions per place. [2022-12-12 13:39:49,039 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 9018 selfloop transitions, 1379 changer transitions 1540/11979 dead transitions. [2022-12-12 13:39:49,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 11979 transitions, 353745 flow [2022-12-12 13:39:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 13:39:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 13:39:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 976 transitions. [2022-12-12 13:39:49,040 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7229629629629629 [2022-12-12 13:39:49,041 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 569 predicate places. [2022-12-12 13:39:49,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 11979 transitions, 353745 flow [2022-12-12 13:39:49,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 11979 transitions, 337681 flow, removed 7750 selfloop flow, removed 4 redundant places. [2022-12-12 13:39:49,988 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 11979 transitions, 337681 flow [2022-12-12 13:39:49,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.291666666666664) internal successors, (1255), 24 states have internal predecessors, (1255), 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) [2022-12-12 13:39:49,989 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:39:49,989 INFO L214 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] [2022-12-12 13:39:49,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-12 13:39:50,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:39:50,194 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:39:50,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:39:50,195 INFO L85 PathProgramCache]: Analyzing trace with hash 227911878, now seen corresponding path program 22 times [2022-12-12 13:39:50,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:39:50,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013710369] [2022-12-12 13:39:50,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:39:50,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:39:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:39:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:39:50,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:39:50,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013710369] [2022-12-12 13:39:50,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013710369] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:39:50,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552583081] [2022-12-12 13:39:50,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 13:39:50,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:39:50,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:39:50,301 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 13:39:50,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-12 13:39:50,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 13:39:50,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:39:50,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:39:50,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:39:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:39:50,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:39:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:39:50,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552583081] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:39:50,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:39:50,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-12-12 13:39:50,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141041767] [2022-12-12 13:39:50,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:39:50,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 13:39:50,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:39:50,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 13:39:50,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-12-12 13:39:50,563 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:39:50,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 11979 transitions, 337681 flow. Second operand has 24 states, 24 states have (on average 52.291666666666664) internal successors, (1255), 24 states have internal predecessors, (1255), 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) [2022-12-12 13:39:50,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:39:50,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:39:50,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:40:25,791 INFO L130 PetriNetUnfolder]: 7310/22998 cut-off events. [2022-12-12 13:40:25,791 INFO L131 PetriNetUnfolder]: For 228559/231998 co-relation queries the response was YES. [2022-12-12 13:40:25,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258021 conditions, 22998 events. 7310/22998 cut-off events. For 228559/231998 co-relation queries the response was YES. Maximal size of possible extension queue 1464. Compared 291675 event pairs, 0 based on Foata normal form. 600/23451 useless extension candidates. Maximal degree in co-relation 164675. Up to 9292 conditions per place. [2022-12-12 13:40:25,975 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 9032 selfloop transitions, 1556 changer transitions 1564/12194 dead transitions. [2022-12-12 13:40:25,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 12194 transitions, 367661 flow [2022-12-12 13:40:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-12 13:40:25,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-12 13:40:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1679 transitions. [2022-12-12 13:40:25,977 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7221505376344086 [2022-12-12 13:40:25,977 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 595 predicate places. [2022-12-12 13:40:25,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 12194 transitions, 367661 flow [2022-12-12 13:40:27,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 12194 transitions, 351373 flow, removed 7890 selfloop flow, removed 15 redundant places. [2022-12-12 13:40:27,034 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 12194 transitions, 351373 flow [2022-12-12 13:40:27,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.291666666666664) internal successors, (1255), 24 states have internal predecessors, (1255), 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) [2022-12-12 13:40:27,035 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:40:27,035 INFO L214 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] [2022-12-12 13:40:27,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-12 13:40:27,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:40:27,240 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:40:27,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:40:27,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1129987168, now seen corresponding path program 23 times [2022-12-12 13:40:27,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:40:27,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59074403] [2022-12-12 13:40:27,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:40:27,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:40:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:40:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:40:27,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:40:27,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59074403] [2022-12-12 13:40:27,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59074403] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:40:27,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86977228] [2022-12-12 13:40:27,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 13:40:27,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:40:27,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:40:27,333 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 13:40:27,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-12 13:40:27,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 13:40:27,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:40:27,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:40:27,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:40:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:40:27,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:40:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:40:27,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86977228] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:40:27,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:40:27,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-12-12 13:40:27,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112530679] [2022-12-12 13:40:27,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:40:27,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 13:40:27,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:40:27,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 13:40:27,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-12-12 13:40:27,580 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:40:27,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 12194 transitions, 351373 flow. Second operand has 24 states, 24 states have (on average 52.291666666666664) internal successors, (1255), 24 states have internal predecessors, (1255), 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) [2022-12-12 13:40:27,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:40:27,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:40:27,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:41:03,601 INFO L130 PetriNetUnfolder]: 7727/24494 cut-off events. [2022-12-12 13:41:03,601 INFO L131 PetriNetUnfolder]: For 262030/265687 co-relation queries the response was YES. [2022-12-12 13:41:03,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281088 conditions, 24494 events. 7727/24494 cut-off events. For 262030/265687 co-relation queries the response was YES. Maximal size of possible extension queue 1541. Compared 314589 event pairs, 0 based on Foata normal form. 622/24956 useless extension candidates. Maximal degree in co-relation 106103. Up to 8924 conditions per place. [2022-12-12 13:41:03,797 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 9113 selfloop transitions, 2063 changer transitions 1642/12860 dead transitions. [2022-12-12 13:41:03,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 12860 transitions, 398271 flow [2022-12-12 13:41:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-12 13:41:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-12 13:41:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2286 transitions. [2022-12-12 13:41:03,799 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7257142857142858 [2022-12-12 13:41:03,799 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 621 predicate places. [2022-12-12 13:41:03,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 12860 transitions, 398271 flow [2022-12-12 13:41:05,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 672 places, 12860 transitions, 376306 flow, removed 10760 selfloop flow, removed 15 redundant places. [2022-12-12 13:41:05,033 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 12860 transitions, 376306 flow [2022-12-12 13:41:05,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.291666666666664) internal successors, (1255), 24 states have internal predecessors, (1255), 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) [2022-12-12 13:41:05,034 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:41:05,034 INFO L214 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] [2022-12-12 13:41:05,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-12 13:41:05,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-12 13:41:05,240 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:41:05,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:41:05,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2056267368, now seen corresponding path program 24 times [2022-12-12 13:41:05,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:41:05,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502368887] [2022-12-12 13:41:05,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:41:05,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:41:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:41:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:41:05,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:41:05,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502368887] [2022-12-12 13:41:05,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502368887] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:41:05,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251933633] [2022-12-12 13:41:05,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 13:41:05,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:41:05,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:41:05,393 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 13:41:05,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-12 13:41:05,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 13:41:05,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:41:05,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 13:41:05,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:41:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:41:05,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:41:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 13:41:05,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251933633] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:41:05,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:41:05,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 13:41:05,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773945727] [2022-12-12 13:41:05,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:41:05,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 13:41:05,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:41:05,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 13:41:05,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-12-12 13:41:05,663 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:41:05,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 12860 transitions, 376306 flow. Second operand has 22 states, 22 states have (on average 52.5) internal successors, (1155), 22 states have internal predecessors, (1155), 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) [2022-12-12 13:41:05,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:41:05,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:41:05,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:41:54,825 INFO L130 PetriNetUnfolder]: 8033/25467 cut-off events. [2022-12-12 13:41:54,825 INFO L131 PetriNetUnfolder]: For 285783/289601 co-relation queries the response was YES. [2022-12-12 13:41:54,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296782 conditions, 25467 events. 8033/25467 cut-off events. For 285783/289601 co-relation queries the response was YES. Maximal size of possible extension queue 1581. Compared 328407 event pairs, 0 based on Foata normal form. 955/26249 useless extension candidates. Maximal degree in co-relation 171871. Up to 7743 conditions per place. [2022-12-12 13:41:55,050 INFO L137 encePairwiseOnDemand]: 63/75 looper letters, 6876 selfloop transitions, 4754 changer transitions 1681/13353 dead transitions. [2022-12-12 13:41:55,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 13353 transitions, 419482 flow [2022-12-12 13:41:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-12 13:41:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-12 13:41:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1979 transitions. [2022-12-12 13:41:55,052 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7329629629629629 [2022-12-12 13:41:55,052 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 638 predicate places. [2022-12-12 13:41:55,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 13353 transitions, 419482 flow [2022-12-12 13:41:56,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 686 places, 13353 transitions, 406904 flow, removed 6034 selfloop flow, removed 18 redundant places. [2022-12-12 13:41:56,435 INFO L495 AbstractCegarLoop]: Abstraction has has 686 places, 13353 transitions, 406904 flow [2022-12-12 13:41:56,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 52.5) internal successors, (1155), 22 states have internal predecessors, (1155), 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) [2022-12-12 13:41:56,436 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:41:56,436 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 13:41:56,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-12 13:41:56,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-12 13:41:56,638 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:41:56,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:41:56,638 INFO L85 PathProgramCache]: Analyzing trace with hash -46869583, now seen corresponding path program 25 times [2022-12-12 13:41:56,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:41:56,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841567108] [2022-12-12 13:41:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:41:56,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:41:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:41:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:41:56,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:41:56,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841567108] [2022-12-12 13:41:56,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841567108] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:41:56,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290684455] [2022-12-12 13:41:56,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 13:41:56,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:41:56,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:41:56,756 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 13:41:56,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-12 13:41:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:41:56,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 13:41:56,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:41:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:41:56,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:41:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:41:57,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290684455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:41:57,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:41:57,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2022-12-12 13:41:57,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125209034] [2022-12-12 13:41:57,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:41:57,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 13:41:57,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:41:57,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 13:41:57,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-12-12 13:41:57,436 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 75 [2022-12-12 13:41:57,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 686 places, 13353 transitions, 406904 flow. Second operand has 11 states, 11 states have (on average 55.63636363636363) internal successors, (612), 11 states have internal predecessors, (612), 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) [2022-12-12 13:41:57,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:41:57,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 75 [2022-12-12 13:41:57,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:43:14,044 INFO L130 PetriNetUnfolder]: 13510/42621 cut-off events. [2022-12-12 13:43:14,044 INFO L131 PetriNetUnfolder]: For 538466/543412 co-relation queries the response was YES. [2022-12-12 13:43:14,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501131 conditions, 42621 events. 13510/42621 cut-off events. For 538466/543412 co-relation queries the response was YES. Maximal size of possible extension queue 2320. Compared 583824 event pairs, 0 based on Foata normal form. 304/42636 useless extension candidates. Maximal degree in co-relation 159454. Up to 12068 conditions per place. [2022-12-12 13:43:14,422 INFO L137 encePairwiseOnDemand]: 67/75 looper letters, 5010 selfloop transitions, 2854 changer transitions 2943/17501 dead transitions. [2022-12-12 13:43:14,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 696 places, 17501 transitions, 563887 flow [2022-12-12 13:43:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 13:43:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 13:43:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 630 transitions. [2022-12-12 13:43:14,423 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7636363636363637 [2022-12-12 13:43:14,428 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 630 predicate places. [2022-12-12 13:43:14,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 696 places, 17501 transitions, 563887 flow [2022-12-12 13:43:17,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 17501 transitions, 555819 flow, removed 3867 selfloop flow, removed 2 redundant places. [2022-12-12 13:43:17,129 INFO L495 AbstractCegarLoop]: Abstraction has has 694 places, 17501 transitions, 555819 flow [2022-12-12 13:43:17,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 55.63636363636363) internal successors, (612), 11 states have internal predecessors, (612), 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) [2022-12-12 13:43:17,129 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:43:17,129 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 13:43:17,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-12 13:43:17,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-12 13:43:17,334 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:43:17,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:43:17,335 INFO L85 PathProgramCache]: Analyzing trace with hash 598667723, now seen corresponding path program 26 times [2022-12-12 13:43:17,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:43:17,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096796871] [2022-12-12 13:43:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:43:17,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:43:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:43:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:43:17,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:43:17,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096796871] [2022-12-12 13:43:17,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096796871] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:43:17,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862395867] [2022-12-12 13:43:17,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 13:43:17,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:43:17,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:43:17,475 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 13:43:17,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-12 13:43:17,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 13:43:17,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:43:17,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 13:43:17,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:43:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:43:17,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:43:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:43:18,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862395867] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:43:18,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:43:18,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-12-12 13:43:18,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836063869] [2022-12-12 13:43:18,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:43:18,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 13:43:18,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:43:18,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 13:43:18,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-12-12 13:43:18,115 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:43:18,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 694 places, 17501 transitions, 555819 flow. Second operand has 25 states, 25 states have (on average 52.24) internal successors, (1306), 25 states have internal predecessors, (1306), 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) [2022-12-12 13:43:18,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:43:18,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:43:18,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:45:44,681 INFO L130 PetriNetUnfolder]: 13922/42871 cut-off events. [2022-12-12 13:45:44,681 INFO L131 PetriNetUnfolder]: For 554326/561364 co-relation queries the response was YES. [2022-12-12 13:45:44,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537237 conditions, 42871 events. 13922/42871 cut-off events. For 554326/561364 co-relation queries the response was YES. Maximal size of possible extension queue 2336. Compared 580332 event pairs, 0 based on Foata normal form. 1650/44423 useless extension candidates. Maximal degree in co-relation 326474. Up to 12365 conditions per place. [2022-12-12 13:45:45,086 INFO L137 encePairwiseOnDemand]: 64/75 looper letters, 4540 selfloop transitions, 14251 changer transitions 3111/21950 dead transitions. [2022-12-12 13:45:45,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 761 places, 21950 transitions, 738803 flow [2022-12-12 13:45:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-12 13:45:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-12-12 13:45:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3701 transitions. [2022-12-12 13:45:45,089 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7256862745098039 [2022-12-12 13:45:45,091 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 695 predicate places. [2022-12-12 13:45:45,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 761 places, 21950 transitions, 738803 flow [2022-12-12 13:45:48,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 752 places, 21950 transitions, 721873 flow, removed 3906 selfloop flow, removed 9 redundant places. [2022-12-12 13:45:48,399 INFO L495 AbstractCegarLoop]: Abstraction has has 752 places, 21950 transitions, 721873 flow [2022-12-12 13:45:48,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 52.24) internal successors, (1306), 25 states have internal predecessors, (1306), 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) [2022-12-12 13:45:48,404 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:45:48,404 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 13:45:48,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-12 13:45:48,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-12 13:45:48,609 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:45:48,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:45:48,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1253395229, now seen corresponding path program 27 times [2022-12-12 13:45:48,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:45:48,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958324164] [2022-12-12 13:45:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:45:48,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:45:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:45:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:45:48,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:45:48,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958324164] [2022-12-12 13:45:48,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958324164] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:45:48,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000734700] [2022-12-12 13:45:48,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 13:45:48,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:45:48,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:45:48,793 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 13:45:48,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-12 13:45:48,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-12 13:45:48,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:45:48,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 13:45:48,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:45:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:45:49,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:45:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:45:49,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000734700] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:45:49,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:45:49,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 27 [2022-12-12 13:45:49,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085540859] [2022-12-12 13:45:49,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:45:49,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 13:45:49,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:45:49,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 13:45:49,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-12-12 13:45:49,355 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:45:49,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 752 places, 21950 transitions, 721873 flow. Second operand has 27 states, 27 states have (on average 52.44444444444444) internal successors, (1416), 27 states have internal predecessors, (1416), 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) [2022-12-12 13:45:49,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:45:49,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:45:49,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:49:38,298 INFO L130 PetriNetUnfolder]: 16855/53069 cut-off events. [2022-12-12 13:49:38,298 INFO L131 PetriNetUnfolder]: For 737024/747290 co-relation queries the response was YES. [2022-12-12 13:49:38,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682461 conditions, 53069 events. 16855/53069 cut-off events. For 737024/747290 co-relation queries the response was YES. Maximal size of possible extension queue 2736. Compared 743509 event pairs, 0 based on Foata normal form. 2123/55058 useless extension candidates. Maximal degree in co-relation 404289. Up to 15554 conditions per place. [2022-12-12 13:49:38,892 INFO L137 encePairwiseOnDemand]: 64/75 looper letters, 9453 selfloop transitions, 17291 changer transitions 4171/30963 dead transitions. [2022-12-12 13:49:38,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 30963 transitions, 1080149 flow [2022-12-12 13:49:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-12-12 13:49:38,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-12-12 13:49:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 5051 transitions. [2022-12-12 13:49:38,902 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.72415770609319 [2022-12-12 13:49:38,903 INFO L295 CegarLoopForPetriNet]: 66 programPoint places, 778 predicate places. [2022-12-12 13:49:38,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 30963 transitions, 1080149 flow [2022-12-12 13:49:43,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 824 places, 30963 transitions, 1063086 flow, removed 5849 selfloop flow, removed 20 redundant places. [2022-12-12 13:49:43,248 INFO L495 AbstractCegarLoop]: Abstraction has has 824 places, 30963 transitions, 1063086 flow [2022-12-12 13:49:43,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 52.44444444444444) internal successors, (1416), 27 states have internal predecessors, (1416), 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) [2022-12-12 13:49:43,248 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:49:43,248 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 13:49:43,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-12 13:49:43,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:49:43,453 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:49:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:49:43,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1053515999, now seen corresponding path program 28 times [2022-12-12 13:49:43,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:49:43,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244248346] [2022-12-12 13:49:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:49:43,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:49:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:49:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:49:43,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:49:43,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244248346] [2022-12-12 13:49:43,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244248346] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:49:43,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634746047] [2022-12-12 13:49:43,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 13:49:43,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:49:43,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:49:43,598 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 13:49:43,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-12 13:49:43,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 13:49:43,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:49:43,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 13:49:43,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:49:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:49:43,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:49:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:49:44,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634746047] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:49:44,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:49:44,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-12-12 13:49:44,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890637515] [2022-12-12 13:49:44,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:49:44,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 13:49:44,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:49:44,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 13:49:44,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-12-12 13:49:44,059 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 75 [2022-12-12 13:49:44,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 30963 transitions, 1063086 flow. Second operand has 31 states, 31 states have (on average 52.41935483870968) internal successors, (1625), 31 states have internal predecessors, (1625), 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) [2022-12-12 13:49:44,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:49:44,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 75 [2022-12-12 13:49:44,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-12 13:50:11,554 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 [2022-12-12 13:50:11,554 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 13:50:11,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-12 13:50:11,562 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 13:50:11,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-12 13:50:11,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:50:11,769 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 50/75 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 46607 conditions, 3123 events (1016/3122 cut-off events. For 35344/36097 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 35928 event pairs, 0 based on Foata normal form. 118/4139 useless extension candidates. Maximal degree in co-relation 32666. Up to 890 conditions per place.). [2022-12-12 13:50:11,771 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 13:50:11,771 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 13:50:11,771 INFO L445 BasicCegarLoop]: Path program histogram: [28, 2, 1] [2022-12-12 13:50:11,790 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 13:50:11,790 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 13:50:11,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 01:50:11 BasicIcfg [2022-12-12 13:50:11,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 13:50:11,794 INFO L158 Benchmark]: Toolchain (without parser) took 855336.37ms. Allocated memory was 196.1MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 172.7MB in the beginning and 430.4MB in the end (delta: -257.7MB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2022-12-12 13:50:11,794 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 196.1MB. Free memory is still 173.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 13:50:11,795 INFO L158 Benchmark]: CACSL2BoogieTranslator took 148.72ms. Allocated memory is still 196.1MB. Free memory was 172.4MB in the beginning and 161.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-12 13:50:11,795 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.82ms. Allocated memory is still 196.1MB. Free memory was 161.0MB in the beginning and 159.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 13:50:11,795 INFO L158 Benchmark]: Boogie Preprocessor took 15.64ms. Allocated memory is still 196.1MB. Free memory was 159.4MB in the beginning and 158.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 13:50:11,795 INFO L158 Benchmark]: RCFGBuilder took 348.57ms. Allocated memory is still 196.1MB. Free memory was 158.3MB in the beginning and 144.7MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-12-12 13:50:11,795 INFO L158 Benchmark]: TraceAbstraction took 854797.52ms. Allocated memory was 196.1MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 143.6MB in the beginning and 430.4MB in the end (delta: -286.8MB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2022-12-12 13:50:11,798 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 196.1MB. Free memory is still 173.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 148.72ms. Allocated memory is still 196.1MB. Free memory was 172.4MB in the beginning and 161.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.82ms. Allocated memory is still 196.1MB. Free memory was 161.0MB in the beginning and 159.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.64ms. Allocated memory is still 196.1MB. Free memory was 159.4MB in the beginning and 158.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 348.57ms. Allocated memory is still 196.1MB. Free memory was 158.3MB in the beginning and 144.7MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 854797.52ms. Allocated memory was 196.1MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 143.6MB in the beginning and 430.4MB in the end (delta: -286.8MB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 50/75 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 46607 conditions, 3123 events (1016/3122 cut-off events. For 35344/36097 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 35928 event pairs, 0 based on Foata normal form. 118/4139 useless extension candidates. Maximal degree in co-relation 32666. Up to 890 conditions per place.). - 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 CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 50/75 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 46607 conditions, 3123 events (1016/3122 cut-off events. For 35344/36097 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 35928 event pairs, 0 based on Foata normal form. 118/4139 useless extension candidates. Maximal degree in co-relation 32666. Up to 890 conditions per place.). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 50/75 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 46607 conditions, 3123 events (1016/3122 cut-off events. For 35344/36097 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 35928 event pairs, 0 based on Foata normal form. 118/4139 useless extension candidates. Maximal degree in co-relation 32666. Up to 890 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 87 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 20.3s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 854.7s, OverallIterations: 31, TraceHistogramMax: 3, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 814.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5738 SdHoareTripleChecker+Valid, 7.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5738 mSDsluCounter, 4004 SdHoareTripleChecker+Invalid, 6.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3365 mSDsCounter, 1390 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19493 IncrementalHoareTripleChecker+Invalid, 20883 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1390 mSolverCounterUnsat, 639 mSDtfsCounter, 19493 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4898 GetRequests, 3276 SyntacticMatches, 58 SemanticMatches, 1564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31259 ImplicationChecksByTransitivity, 16.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1063086occurred in iteration=30, InterpolantAutomatonStates: 1159, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 20.3s AutomataMinimizationTime, 30 MinimizatonAttempts, 196487 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 11.4s InterpolantComputationTime, 3814 NumberOfCodeBlocks, 3787 NumberOfCodeBlocksAsserted, 95 NumberOfCheckSat, 5526 ConstructedInterpolants, 0 QuantifiedInterpolants, 18235 SizeOfPredicates, 258 NumberOfNonLiveVariables, 4250 ConjunctsInSsa, 269 ConjunctsInUnsatCore, 88 InterpolantComputations, 3 PerfectInterpolantSequences, 385/741 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