/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 15:20:52,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 15:20:52,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 15:20:52,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 15:20:52,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 15:20:52,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 15:20:52,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 15:20:52,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 15:20:52,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 15:20:52,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 15:20:52,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 15:20:52,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 15:20:52,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 15:20:52,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 15:20:52,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 15:20:52,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 15:20:52,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 15:20:52,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 15:20:52,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 15:20:52,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 15:20:52,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 15:20:52,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 15:20:52,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 15:20:52,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 15:20:52,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 15:20:52,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 15:20:52,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 15:20:52,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 15:20:52,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 15:20:52,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 15:20:52,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 15:20:52,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 15:20:52,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 15:20:52,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 15:20:52,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 15:20:52,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 15:20:52,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 15:20:52,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 15:20:52,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 15:20:52,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 15:20:52,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 15:20:52,064 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 15:20:52,089 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 15:20:52,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 15:20:52,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 15:20:52,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 15:20:52,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 15:20:52,091 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 15:20:52,091 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 15:20:52,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 15:20:52,091 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 15:20:52,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 15:20:52,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 15:20:52,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 15:20:52,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 15:20:52,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 15:20:52,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 15:20:52,093 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 15:20:52,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 15:20:52,093 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 15:20:52,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 15:20:52,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 15:20:52,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 15:20:52,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 15:20:52,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 15:20:52,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 15:20:52,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 15:20:52,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 15:20:52,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 15:20:52,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 15:20:52,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 15:20:52,094 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 15:20:52,094 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 15:20:52,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 15:20:52,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 15:20:52,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 15:20:52,354 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 15:20:52,354 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 15:20:52,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c [2022-12-12 15:20:53,261 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 15:20:53,402 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 15:20:53,403 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c [2022-12-12 15:20:53,417 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aba99323/aac0cc79f73543daa85f521d7e077bc5/FLAG6ee698c11 [2022-12-12 15:20:53,429 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aba99323/aac0cc79f73543daa85f521d7e077bc5 [2022-12-12 15:20:53,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 15:20:53,433 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 15:20:53,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 15:20:53,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 15:20:53,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 15:20:53,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 03:20:53" (1/1) ... [2022-12-12 15:20:53,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@622195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:20:53, skipping insertion in model container [2022-12-12 15:20:53,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 03:20:53" (1/1) ... [2022-12-12 15:20:53,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 15:20:53,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 15:20:53,633 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/chl-nzb-file-trans.wvr.c[6450,6463] [2022-12-12 15:20:53,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 15:20:53,653 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 15:20:53,691 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/chl-nzb-file-trans.wvr.c[6450,6463] [2022-12-12 15:20:53,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 15:20:53,708 INFO L208 MainTranslator]: Completed translation [2022-12-12 15:20:53,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:20:53 WrapperNode [2022-12-12 15:20:53,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 15:20:53,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 15:20:53,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 15:20:53,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 15:20:53,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:20:53" (1/1) ... [2022-12-12 15:20:53,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:20:53" (1/1) ... [2022-12-12 15:20:53,758 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 574 [2022-12-12 15:20:53,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 15:20:53,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 15:20:53,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 15:20:53,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 15:20:53,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:20:53" (1/1) ... [2022-12-12 15:20:53,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:20:53" (1/1) ... [2022-12-12 15:20:53,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:20:53" (1/1) ... [2022-12-12 15:20:53,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:20:53" (1/1) ... [2022-12-12 15:20:53,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:20:53" (1/1) ... [2022-12-12 15:20:53,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:20:53" (1/1) ... [2022-12-12 15:20:53,782 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:20:53" (1/1) ... [2022-12-12 15:20:53,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:20:53" (1/1) ... [2022-12-12 15:20:53,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 15:20:53,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 15:20:53,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 15:20:53,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 15:20:53,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:20:53" (1/1) ... [2022-12-12 15:20:53,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 15:20:53,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:20:53,819 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 15:20:53,830 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 15:20:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 15:20:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 15:20:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 15:20:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 15:20:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 15:20:53,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 15:20:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 15:20:53,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 15:20:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 15:20:53,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 15:20:53,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 15:20:53,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 15:20:53,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 15:20:53,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 15:20:53,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 15:20:53,855 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 15:20:53,961 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 15:20:53,962 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 15:20:54,539 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 15:20:54,571 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 15:20:54,571 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-12 15:20:54,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 03:20:54 BoogieIcfgContainer [2022-12-12 15:20:54,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 15:20:54,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 15:20:54,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 15:20:54,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 15:20:54,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 03:20:53" (1/3) ... [2022-12-12 15:20:54,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abc26b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 03:20:54, skipping insertion in model container [2022-12-12 15:20:54,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:20:53" (2/3) ... [2022-12-12 15:20:54,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abc26b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 03:20:54, skipping insertion in model container [2022-12-12 15:20:54,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 03:20:54" (3/3) ... [2022-12-12 15:20:54,578 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2022-12-12 15:20:54,607 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 15:20:54,607 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 15:20:54,607 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 15:20:54,707 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-12 15:20:54,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 627 places, 690 transitions, 1404 flow [2022-12-12 15:20:54,931 INFO L130 PetriNetUnfolder]: 73/687 cut-off events. [2022-12-12 15:20:54,931 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 15:20:54,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 687 events. 73/687 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2360 event pairs, 0 based on Foata normal form. 0/613 useless extension candidates. Maximal degree in co-relation 507. Up to 2 conditions per place. [2022-12-12 15:20:54,947 INFO L82 GeneralOperation]: Start removeDead. Operand has 627 places, 690 transitions, 1404 flow [2022-12-12 15:20:54,956 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 614 places, 677 transitions, 1372 flow [2022-12-12 15:20:54,957 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 15:20:54,967 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 614 places, 677 transitions, 1372 flow [2022-12-12 15:20:54,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 614 places, 677 transitions, 1372 flow [2022-12-12 15:20:55,091 INFO L130 PetriNetUnfolder]: 73/677 cut-off events. [2022-12-12 15:20:55,091 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 15:20:55,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 677 events. 73/677 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2359 event pairs, 0 based on Foata normal form. 0/604 useless extension candidates. Maximal degree in co-relation 507. Up to 2 conditions per place. [2022-12-12 15:20:55,160 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 614 places, 677 transitions, 1372 flow [2022-12-12 15:20:55,161 INFO L226 LiptonReduction]: Number of co-enabled transitions 153384 [2022-12-12 15:21:18,297 INFO L241 LiptonReduction]: Total number of compositions: 632 [2022-12-12 15:21:18,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 15:21:18,311 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;@272a9fad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 15:21:18,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-12 15:21:18,318 INFO L130 PetriNetUnfolder]: 13/48 cut-off events. [2022-12-12 15:21:18,318 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 15:21:18,318 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:18,318 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:21:18,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:18,322 INFO L85 PathProgramCache]: Analyzing trace with hash -759560692, now seen corresponding path program 1 times [2022-12-12 15:21:18,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:18,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351572948] [2022-12-12 15:21:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:18,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:18,671 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 15:21:18,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:18,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351572948] [2022-12-12 15:21:18,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351572948] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:21:18,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:21:18,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 15:21:18,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434690957] [2022-12-12 15:21:18,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:21:18,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 15:21:18,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:18,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 15:21:18,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 15:21:18,691 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:18,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 15:21:18,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:18,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:18,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:21:19,168 INFO L130 PetriNetUnfolder]: 2776/3671 cut-off events. [2022-12-12 15:21:19,169 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-12-12 15:21:19,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7603 conditions, 3671 events. 2776/3671 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12995 event pairs, 1657 based on Foata normal form. 0/2552 useless extension candidates. Maximal degree in co-relation 7072. Up to 3669 conditions per place. [2022-12-12 15:21:19,183 INFO L137 encePairwiseOnDemand]: 42/49 looper letters, 46 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2022-12-12 15:21:19,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 226 flow [2022-12-12 15:21:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 15:21:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 15:21:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2022-12-12 15:21:19,193 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2022-12-12 15:21:19,194 INFO L175 Difference]: Start difference. First operand has 46 places, 49 transitions, 116 flow. Second operand 3 states and 55 transitions. [2022-12-12 15:21:19,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 226 flow [2022-12-12 15:21:19,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 214 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-12 15:21:19,200 INFO L231 Difference]: Finished difference. Result has 43 places, 52 transitions, 136 flow [2022-12-12 15:21:19,201 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=43, PETRI_TRANSITIONS=52} [2022-12-12 15:21:19,204 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2022-12-12 15:21:19,205 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 52 transitions, 136 flow [2022-12-12 15:21:19,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 15:21:19,205 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:19,205 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] [2022-12-12 15:21:19,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 15:21:19,206 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:19,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1800656135, now seen corresponding path program 1 times [2022-12-12 15:21:19,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:19,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737734825] [2022-12-12 15:21:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:19,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:21:19,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:19,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737734825] [2022-12-12 15:21:19,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737734825] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:21:19,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166363685] [2022-12-12 15:21:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:19,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:21:19,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:21:19,374 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 15:21:19,399 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 15:21:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:19,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-12 15:21:19,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:21:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:21:19,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:21:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:21:19,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166363685] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:21:19,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:21:19,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-12 15:21:19,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144685075] [2022-12-12 15:21:19,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:21:19,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 15:21:19,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:19,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 15:21:19,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-12-12 15:21:19,590 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:19,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 52 transitions, 136 flow. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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 15:21:19,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:19,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:19,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:21:20,122 INFO L130 PetriNetUnfolder]: 2776/3680 cut-off events. [2022-12-12 15:21:20,123 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-12 15:21:20,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7497 conditions, 3680 events. 2776/3680 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13032 event pairs, 1657 based on Foata normal form. 6/2569 useless extension candidates. Maximal degree in co-relation 7448. Up to 3669 conditions per place. [2022-12-12 15:21:20,134 INFO L137 encePairwiseOnDemand]: 42/49 looper letters, 46 selfloop transitions, 15 changer transitions 0/61 dead transitions. [2022-12-12 15:21:20,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 294 flow [2022-12-12 15:21:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:21:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:21:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2022-12-12 15:21:20,136 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.23809523809523808 [2022-12-12 15:21:20,136 INFO L175 Difference]: Start difference. First operand has 43 places, 52 transitions, 136 flow. Second operand 6 states and 70 transitions. [2022-12-12 15:21:20,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 294 flow [2022-12-12 15:21:20,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 15:21:20,137 INFO L231 Difference]: Finished difference. Result has 50 places, 61 transitions, 226 flow [2022-12-12 15:21:20,137 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=50, PETRI_TRANSITIONS=61} [2022-12-12 15:21:20,138 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2022-12-12 15:21:20,138 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 61 transitions, 226 flow [2022-12-12 15:21:20,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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 15:21:20,138 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:20,138 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:21:20,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-12 15:21:20,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:21:20,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:20,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:20,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1416607028, now seen corresponding path program 2 times [2022-12-12 15:21:20,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:20,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32742473] [2022-12-12 15:21:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:20,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 15:21:20,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:20,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32742473] [2022-12-12 15:21:20,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32742473] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:21:20,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017014202] [2022-12-12 15:21:20,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:21:20,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:21:20,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:21:20,506 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 15:21:20,508 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 15:21:20,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-12 15:21:20,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:21:20,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 15:21:20,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:21:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 15:21:21,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 15:21:21,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017014202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:21:21,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 15:21:21,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-12 15:21:21,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080497370] [2022-12-12 15:21:21,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:21:21,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:21:21,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:21,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:21:21,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-12 15:21:21,470 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:21,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 61 transitions, 226 flow. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:21,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:21,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:21,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:21:22,394 INFO L130 PetriNetUnfolder]: 3116/4199 cut-off events. [2022-12-12 15:21:22,395 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-12 15:21:22,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8577 conditions, 4199 events. 3116/4199 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16257 event pairs, 1657 based on Foata normal form. 1/2930 useless extension candidates. Maximal degree in co-relation 8489. Up to 3599 conditions per place. [2022-12-12 15:21:22,409 INFO L137 encePairwiseOnDemand]: 45/49 looper letters, 99 selfloop transitions, 2 changer transitions 7/108 dead transitions. [2022-12-12 15:21:22,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 108 transitions, 548 flow [2022-12-12 15:21:22,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:21:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:21:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2022-12-12 15:21:22,410 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39591836734693875 [2022-12-12 15:21:22,410 INFO L175 Difference]: Start difference. First operand has 50 places, 61 transitions, 226 flow. Second operand 5 states and 97 transitions. [2022-12-12 15:21:22,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 108 transitions, 548 flow [2022-12-12 15:21:22,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 108 transitions, 524 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-12 15:21:22,413 INFO L231 Difference]: Finished difference. Result has 56 places, 62 transitions, 217 flow [2022-12-12 15:21:22,413 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=56, PETRI_TRANSITIONS=62} [2022-12-12 15:21:22,414 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2022-12-12 15:21:22,414 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 62 transitions, 217 flow [2022-12-12 15:21:22,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:22,415 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:22,415 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:21:22,424 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 15:21:22,619 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,SelfDestructingSolverStorable2 [2022-12-12 15:21:22,619 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1329956240, now seen corresponding path program 3 times [2022-12-12 15:21:22,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:22,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569939313] [2022-12-12 15:21:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:22,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 15:21:22,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:22,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569939313] [2022-12-12 15:21:22,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569939313] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:21:22,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728770210] [2022-12-12 15:21:22,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:21:22,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:21:22,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:21:22,776 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 15:21:22,778 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 15:21:22,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-12 15:21:22,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:21:22,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 15:21:22,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:21:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 15:21:23,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 15:21:23,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728770210] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:21:23,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 15:21:23,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-12-12 15:21:23,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112372626] [2022-12-12 15:21:23,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:21:23,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:21:23,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:23,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:21:23,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-12 15:21:23,564 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:23,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 217 flow. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:23,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:23,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:23,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:21:24,579 INFO L130 PetriNetUnfolder]: 3316/4549 cut-off events. [2022-12-12 15:21:24,579 INFO L131 PetriNetUnfolder]: For 701/701 co-relation queries the response was YES. [2022-12-12 15:21:24,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9787 conditions, 4549 events. 3316/4549 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18781 event pairs, 1919 based on Foata normal form. 1/3672 useless extension candidates. Maximal degree in co-relation 9755. Up to 4051 conditions per place. [2022-12-12 15:21:24,591 INFO L137 encePairwiseOnDemand]: 45/49 looper letters, 104 selfloop transitions, 3 changer transitions 7/114 dead transitions. [2022-12-12 15:21:24,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 114 transitions, 571 flow [2022-12-12 15:21:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:21:24,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:21:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2022-12-12 15:21:24,595 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4163265306122449 [2022-12-12 15:21:24,595 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 217 flow. Second operand 5 states and 102 transitions. [2022-12-12 15:21:24,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 114 transitions, 571 flow [2022-12-12 15:21:24,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 114 transitions, 562 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-12 15:21:24,600 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 234 flow [2022-12-12 15:21:24,600 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2022-12-12 15:21:24,601 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2022-12-12 15:21:24,602 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 234 flow [2022-12-12 15:21:24,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:24,603 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:24,603 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:21:24,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-12 15:21:24,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:21:24,807 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:24,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:24,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2032434040, now seen corresponding path program 4 times [2022-12-12 15:21:24,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:24,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625078524] [2022-12-12 15:21:24,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:24,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 15:21:24,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:24,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625078524] [2022-12-12 15:21:24,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625078524] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:21:24,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897529782] [2022-12-12 15:21:24,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:21:24,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:21:24,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:21:24,952 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 15:21:24,956 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 15:21:25,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:21:25,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:21:25,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 15:21:25,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:21:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 15:21:25,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:21:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 15:21:25,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897529782] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:21:25,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:21:25,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-12-12 15:21:25,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185455297] [2022-12-12 15:21:25,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:21:25,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 15:21:25,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:25,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 15:21:25,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-12-12 15:21:25,241 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:25,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 234 flow. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 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 15:21:25,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:25,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:25,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:21:25,830 INFO L130 PetriNetUnfolder]: 3315/4544 cut-off events. [2022-12-12 15:21:25,830 INFO L131 PetriNetUnfolder]: For 1833/1833 co-relation queries the response was YES. [2022-12-12 15:21:25,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10297 conditions, 4544 events. 3315/4544 cut-off events. For 1833/1833 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18486 event pairs, 2136 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 10263. Up to 4530 conditions per place. [2022-12-12 15:21:25,844 INFO L137 encePairwiseOnDemand]: 42/49 looper letters, 48 selfloop transitions, 18 changer transitions 0/66 dead transitions. [2022-12-12 15:21:25,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 66 transitions, 384 flow [2022-12-12 15:21:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:21:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:21:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 67 transitions. [2022-12-12 15:21:25,845 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.19533527696793002 [2022-12-12 15:21:25,845 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 234 flow. Second operand 7 states and 67 transitions. [2022-12-12 15:21:25,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 66 transitions, 384 flow [2022-12-12 15:21:25,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 378 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-12 15:21:25,848 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 296 flow [2022-12-12 15:21:25,849 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=296, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2022-12-12 15:21:25,849 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2022-12-12 15:21:25,849 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 296 flow [2022-12-12 15:21:25,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 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 15:21:25,849 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:25,849 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:21:25,856 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 15:21:26,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:21:26,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:26,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:26,055 INFO L85 PathProgramCache]: Analyzing trace with hash 877729935, now seen corresponding path program 5 times [2022-12-12 15:21:26,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:26,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957112005] [2022-12-12 15:21:26,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:26,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:26,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:26,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957112005] [2022-12-12 15:21:26,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957112005] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:21:26,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:21:26,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 15:21:26,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499168495] [2022-12-12 15:21:26,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:21:26,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:21:26,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:26,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:21:26,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 15:21:26,663 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:26,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 296 flow. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:26,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:26,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:26,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:21:27,772 INFO L130 PetriNetUnfolder]: 5139/7097 cut-off events. [2022-12-12 15:21:27,773 INFO L131 PetriNetUnfolder]: For 1454/1454 co-relation queries the response was YES. [2022-12-12 15:21:27,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15436 conditions, 7097 events. 5139/7097 cut-off events. For 1454/1454 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 33847 event pairs, 1396 based on Foata normal form. 1/5552 useless extension candidates. Maximal degree in co-relation 15323. Up to 3599 conditions per place. [2022-12-12 15:21:27,797 INFO L137 encePairwiseOnDemand]: 38/49 looper letters, 132 selfloop transitions, 18 changer transitions 1/151 dead transitions. [2022-12-12 15:21:27,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 151 transitions, 812 flow [2022-12-12 15:21:27,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:21:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:21:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2022-12-12 15:21:27,799 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2022-12-12 15:21:27,799 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 296 flow. Second operand 5 states and 133 transitions. [2022-12-12 15:21:27,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 151 transitions, 812 flow [2022-12-12 15:21:27,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 151 transitions, 776 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-12-12 15:21:27,807 INFO L231 Difference]: Finished difference. Result has 68 places, 84 transitions, 422 flow [2022-12-12 15:21:27,807 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=68, PETRI_TRANSITIONS=84} [2022-12-12 15:21:27,809 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2022-12-12 15:21:27,809 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 84 transitions, 422 flow [2022-12-12 15:21:27,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:27,809 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:27,810 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:21:27,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 15:21:27,813 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:27,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:27,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1040886035, now seen corresponding path program 6 times [2022-12-12 15:21:27,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:27,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222992203] [2022-12-12 15:21:27,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:27,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:28,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:28,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222992203] [2022-12-12 15:21:28,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222992203] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:21:28,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:21:28,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 15:21:28,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431500633] [2022-12-12 15:21:28,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:21:28,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:21:28,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:28,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:21:28,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 15:21:28,310 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:28,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 84 transitions, 422 flow. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:28,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:28,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:28,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:21:29,495 INFO L130 PetriNetUnfolder]: 5292/7325 cut-off events. [2022-12-12 15:21:29,496 INFO L131 PetriNetUnfolder]: For 5235/5235 co-relation queries the response was YES. [2022-12-12 15:21:29,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19930 conditions, 7325 events. 5292/7325 cut-off events. For 5235/5235 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33624 event pairs, 3051 based on Foata normal form. 1/5874 useless extension candidates. Maximal degree in co-relation 19831. Up to 6038 conditions per place. [2022-12-12 15:21:29,519 INFO L137 encePairwiseOnDemand]: 38/49 looper letters, 133 selfloop transitions, 23 changer transitions 2/158 dead transitions. [2022-12-12 15:21:29,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 158 transitions, 1002 flow [2022-12-12 15:21:29,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:21:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:21:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2022-12-12 15:21:29,521 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4775510204081633 [2022-12-12 15:21:29,521 INFO L175 Difference]: Start difference. First operand has 68 places, 84 transitions, 422 flow. Second operand 5 states and 117 transitions. [2022-12-12 15:21:29,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 158 transitions, 1002 flow [2022-12-12 15:21:29,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 158 transitions, 1000 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-12 15:21:29,533 INFO L231 Difference]: Finished difference. Result has 75 places, 98 transitions, 612 flow [2022-12-12 15:21:29,533 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=612, PETRI_PLACES=75, PETRI_TRANSITIONS=98} [2022-12-12 15:21:29,534 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 29 predicate places. [2022-12-12 15:21:29,534 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 98 transitions, 612 flow [2022-12-12 15:21:29,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:29,534 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:29,534 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:21:29,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-12 15:21:29,534 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:29,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:29,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1543872765, now seen corresponding path program 7 times [2022-12-12 15:21:29,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:29,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003297580] [2022-12-12 15:21:29,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:29,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:29,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:29,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003297580] [2022-12-12 15:21:29,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003297580] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:21:29,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:21:29,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 15:21:29,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116692055] [2022-12-12 15:21:29,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:21:29,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:21:29,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:29,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:21:29,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 15:21:29,947 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:29,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 98 transitions, 612 flow. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:29,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:29,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:29,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:21:31,138 INFO L130 PetriNetUnfolder]: 5603/7786 cut-off events. [2022-12-12 15:21:31,138 INFO L131 PetriNetUnfolder]: For 11091/11091 co-relation queries the response was YES. [2022-12-12 15:21:31,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23615 conditions, 7786 events. 5603/7786 cut-off events. For 11091/11091 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 36937 event pairs, 2969 based on Foata normal form. 1/6201 useless extension candidates. Maximal degree in co-relation 23512. Up to 6282 conditions per place. [2022-12-12 15:21:31,170 INFO L137 encePairwiseOnDemand]: 37/49 looper letters, 155 selfloop transitions, 19 changer transitions 2/176 dead transitions. [2022-12-12 15:21:31,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 176 transitions, 1249 flow [2022-12-12 15:21:31,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:21:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:21:31,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2022-12-12 15:21:31,171 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.49387755102040815 [2022-12-12 15:21:31,171 INFO L175 Difference]: Start difference. First operand has 75 places, 98 transitions, 612 flow. Second operand 5 states and 121 transitions. [2022-12-12 15:21:31,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 176 transitions, 1249 flow [2022-12-12 15:21:31,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 176 transitions, 1235 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-12 15:21:31,193 INFO L231 Difference]: Finished difference. Result has 81 places, 113 transitions, 801 flow [2022-12-12 15:21:31,193 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=801, PETRI_PLACES=81, PETRI_TRANSITIONS=113} [2022-12-12 15:21:31,194 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 35 predicate places. [2022-12-12 15:21:31,194 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 113 transitions, 801 flow [2022-12-12 15:21:31,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:31,194 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:31,194 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:21:31,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-12 15:21:31,194 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:31,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:31,195 INFO L85 PathProgramCache]: Analyzing trace with hash -2129159793, now seen corresponding path program 8 times [2022-12-12 15:21:31,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:31,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238127140] [2022-12-12 15:21:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:31,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:31,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:31,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238127140] [2022-12-12 15:21:31,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238127140] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:21:31,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:21:31,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 15:21:31,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512200249] [2022-12-12 15:21:31,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:21:31,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:21:31,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:31,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:21:31,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 15:21:31,609 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:31,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 113 transitions, 801 flow. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:31,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:31,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:31,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:21:32,899 INFO L130 PetriNetUnfolder]: 5694/7909 cut-off events. [2022-12-12 15:21:32,899 INFO L131 PetriNetUnfolder]: For 14506/14506 co-relation queries the response was YES. [2022-12-12 15:21:32,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26830 conditions, 7909 events. 5694/7909 cut-off events. For 14506/14506 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 38880 event pairs, 1372 based on Foata normal form. 1/6456 useless extension candidates. Maximal degree in co-relation 26724. Up to 4102 conditions per place. [2022-12-12 15:21:32,934 INFO L137 encePairwiseOnDemand]: 37/49 looper letters, 148 selfloop transitions, 40 changer transitions 1/189 dead transitions. [2022-12-12 15:21:32,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 189 transitions, 1482 flow [2022-12-12 15:21:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:21:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:21:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2022-12-12 15:21:32,935 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5265306122448979 [2022-12-12 15:21:32,935 INFO L175 Difference]: Start difference. First operand has 81 places, 113 transitions, 801 flow. Second operand 5 states and 129 transitions. [2022-12-12 15:21:32,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 189 transitions, 1482 flow [2022-12-12 15:21:32,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 189 transitions, 1467 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-12 15:21:32,977 INFO L231 Difference]: Finished difference. Result has 87 places, 126 transitions, 1056 flow [2022-12-12 15:21:32,977 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1056, PETRI_PLACES=87, PETRI_TRANSITIONS=126} [2022-12-12 15:21:32,978 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 41 predicate places. [2022-12-12 15:21:32,978 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 126 transitions, 1056 flow [2022-12-12 15:21:32,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:32,978 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:32,978 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:21:32,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-12 15:21:32,978 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:32,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:32,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1921675848, now seen corresponding path program 1 times [2022-12-12 15:21:32,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:32,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840800731] [2022-12-12 15:21:32,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:32,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:33,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:33,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840800731] [2022-12-12 15:21:33,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840800731] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:21:33,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:21:33,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 15:21:33,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628945330] [2022-12-12 15:21:33,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:21:33,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 15:21:33,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:33,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 15:21:33,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 15:21:33,086 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:33,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 126 transitions, 1056 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 15:21:33,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:33,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:33,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:21:34,583 INFO L130 PetriNetUnfolder]: 8242/11323 cut-off events. [2022-12-12 15:21:34,583 INFO L131 PetriNetUnfolder]: For 27397/27397 co-relation queries the response was YES. [2022-12-12 15:21:34,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41196 conditions, 11323 events. 8242/11323 cut-off events. For 27397/27397 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 53975 event pairs, 3363 based on Foata normal form. 154/9321 useless extension candidates. Maximal degree in co-relation 41087. Up to 7848 conditions per place. [2022-12-12 15:21:34,627 INFO L137 encePairwiseOnDemand]: 45/49 looper letters, 160 selfloop transitions, 7 changer transitions 0/167 dead transitions. [2022-12-12 15:21:34,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 167 transitions, 1642 flow [2022-12-12 15:21:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 15:21:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 15:21:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2022-12-12 15:21:34,628 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2022-12-12 15:21:34,628 INFO L175 Difference]: Start difference. First operand has 87 places, 126 transitions, 1056 flow. Second operand 3 states and 80 transitions. [2022-12-12 15:21:34,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 167 transitions, 1642 flow [2022-12-12 15:21:34,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 167 transitions, 1560 flow, removed 21 selfloop flow, removed 1 redundant places. [2022-12-12 15:21:34,709 INFO L231 Difference]: Finished difference. Result has 89 places, 125 transitions, 987 flow [2022-12-12 15:21:34,709 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=987, PETRI_PLACES=89, PETRI_TRANSITIONS=125} [2022-12-12 15:21:34,709 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 43 predicate places. [2022-12-12 15:21:34,709 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 125 transitions, 987 flow [2022-12-12 15:21:34,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 15:21:34,709 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:34,710 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:21:34,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-12 15:21:34,710 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:34,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:34,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1452397570, now seen corresponding path program 1 times [2022-12-12 15:21:34,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:34,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332707340] [2022-12-12 15:21:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:34,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:34,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:34,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332707340] [2022-12-12 15:21:34,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332707340] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:21:34,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:21:34,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 15:21:34,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366202071] [2022-12-12 15:21:34,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:21:34,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 15:21:34,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:34,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 15:21:34,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 15:21:34,803 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:34,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 125 transitions, 987 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 15:21:34,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:34,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:34,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:21:37,176 INFO L130 PetriNetUnfolder]: 13201/17938 cut-off events. [2022-12-12 15:21:37,176 INFO L131 PetriNetUnfolder]: For 42480/42480 co-relation queries the response was YES. [2022-12-12 15:21:37,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62898 conditions, 17938 events. 13201/17938 cut-off events. For 42480/42480 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 88954 event pairs, 5225 based on Foata normal form. 244/14638 useless extension candidates. Maximal degree in co-relation 62788. Up to 11424 conditions per place. [2022-12-12 15:21:37,252 INFO L137 encePairwiseOnDemand]: 45/49 looper letters, 171 selfloop transitions, 5 changer transitions 0/176 dead transitions. [2022-12-12 15:21:37,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 176 transitions, 1677 flow [2022-12-12 15:21:37,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 15:21:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 15:21:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2022-12-12 15:21:37,253 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2022-12-12 15:21:37,254 INFO L175 Difference]: Start difference. First operand has 89 places, 125 transitions, 987 flow. Second operand 3 states and 81 transitions. [2022-12-12 15:21:37,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 176 transitions, 1677 flow [2022-12-12 15:21:37,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 176 transitions, 1666 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 15:21:37,340 INFO L231 Difference]: Finished difference. Result has 91 places, 126 transitions, 1001 flow [2022-12-12 15:21:37,340 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1001, PETRI_PLACES=91, PETRI_TRANSITIONS=126} [2022-12-12 15:21:37,340 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 45 predicate places. [2022-12-12 15:21:37,341 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 126 transitions, 1001 flow [2022-12-12 15:21:37,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 15:21:37,341 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:37,341 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:21:37,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-12 15:21:37,341 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:37,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:37,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1898259066, now seen corresponding path program 1 times [2022-12-12 15:21:37,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:37,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833262692] [2022-12-12 15:21:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:37,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:37,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:37,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833262692] [2022-12-12 15:21:37,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833262692] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:21:37,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:21:37,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 15:21:37,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628381717] [2022-12-12 15:21:37,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:21:37,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 15:21:37,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:37,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 15:21:37,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 15:21:37,440 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:37,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 126 transitions, 1001 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 15:21:37,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:37,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:37,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:21:40,274 INFO L130 PetriNetUnfolder]: 14662/20021 cut-off events. [2022-12-12 15:21:40,274 INFO L131 PetriNetUnfolder]: For 50186/50186 co-relation queries the response was YES. [2022-12-12 15:21:40,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72255 conditions, 20021 events. 14662/20021 cut-off events. For 50186/50186 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 101420 event pairs, 7729 based on Foata normal form. 0/16503 useless extension candidates. Maximal degree in co-relation 72144. Up to 16878 conditions per place. [2022-12-12 15:21:40,371 INFO L137 encePairwiseOnDemand]: 46/49 looper letters, 150 selfloop transitions, 16 changer transitions 2/168 dead transitions. [2022-12-12 15:21:40,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 168 transitions, 1563 flow [2022-12-12 15:21:40,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 15:21:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 15:21:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2022-12-12 15:21:40,372 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2022-12-12 15:21:40,372 INFO L175 Difference]: Start difference. First operand has 91 places, 126 transitions, 1001 flow. Second operand 3 states and 82 transitions. [2022-12-12 15:21:40,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 168 transitions, 1563 flow [2022-12-12 15:21:40,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 168 transitions, 1554 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 15:21:40,463 INFO L231 Difference]: Finished difference. Result has 93 places, 120 transitions, 994 flow [2022-12-12 15:21:40,463 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=994, PETRI_PLACES=93, PETRI_TRANSITIONS=120} [2022-12-12 15:21:40,464 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 47 predicate places. [2022-12-12 15:21:40,464 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 120 transitions, 994 flow [2022-12-12 15:21:40,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 15:21:40,464 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:40,464 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:21:40,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-12 15:21:40,464 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:40,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1397550006, now seen corresponding path program 1 times [2022-12-12 15:21:40,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:40,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427627114] [2022-12-12 15:21:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:40,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:40,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:40,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427627114] [2022-12-12 15:21:40,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427627114] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:21:40,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543558077] [2022-12-12 15:21:40,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:40,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:21:40,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:21:40,853 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 15:21:40,855 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 15:21:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:41,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 15:21:41,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:21:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:41,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:21:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:41,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543558077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:21:41,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:21:41,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-12-12 15:21:41,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434649643] [2022-12-12 15:21:41,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:21:41,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 15:21:41,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:41,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 15:21:41,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-12 15:21:41,168 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:41,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 120 transitions, 994 flow. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 8 states have internal predecessors, (46), 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 15:21:41,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:41,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:41,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:21:47,086 INFO L130 PetriNetUnfolder]: 30168/41480 cut-off events. [2022-12-12 15:21:47,086 INFO L131 PetriNetUnfolder]: For 119791/119791 co-relation queries the response was YES. [2022-12-12 15:21:47,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148282 conditions, 41480 events. 30168/41480 cut-off events. For 119791/119791 co-relation queries the response was YES. Maximal size of possible extension queue 1036. Compared 238302 event pairs, 3261 based on Foata normal form. 967/35203 useless extension candidates. Maximal degree in co-relation 148170. Up to 16182 conditions per place. [2022-12-12 15:21:47,341 INFO L137 encePairwiseOnDemand]: 38/49 looper letters, 294 selfloop transitions, 54 changer transitions 40/388 dead transitions. [2022-12-12 15:21:47,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 388 transitions, 3221 flow [2022-12-12 15:21:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 15:21:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 15:21:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2022-12-12 15:21:47,343 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.44727891156462585 [2022-12-12 15:21:47,343 INFO L175 Difference]: Start difference. First operand has 93 places, 120 transitions, 994 flow. Second operand 12 states and 263 transitions. [2022-12-12 15:21:47,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 388 transitions, 3221 flow [2022-12-12 15:21:47,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 388 transitions, 3157 flow, removed 18 selfloop flow, removed 1 redundant places. [2022-12-12 15:21:47,559 INFO L231 Difference]: Finished difference. Result has 108 places, 156 transitions, 1486 flow [2022-12-12 15:21:47,559 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1486, PETRI_PLACES=108, PETRI_TRANSITIONS=156} [2022-12-12 15:21:47,559 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 62 predicate places. [2022-12-12 15:21:47,559 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 156 transitions, 1486 flow [2022-12-12 15:21:47,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 8 states have internal predecessors, (46), 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 15:21:47,560 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:47,560 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:21:47,564 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 15:21:47,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-12 15:21:47,761 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:47,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:47,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2021046394, now seen corresponding path program 2 times [2022-12-12 15:21:47,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:47,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822044614] [2022-12-12 15:21:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:47,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:21:48,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:48,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822044614] [2022-12-12 15:21:48,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822044614] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:21:48,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:21:48,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 15:21:48,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095999626] [2022-12-12 15:21:48,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:21:48,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 15:21:48,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:48,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 15:21:48,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 15:21:48,113 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:48,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 156 transitions, 1486 flow. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:48,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:48,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:48,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:21:53,921 INFO L130 PetriNetUnfolder]: 29546/40561 cut-off events. [2022-12-12 15:21:53,922 INFO L131 PetriNetUnfolder]: For 142174/142174 co-relation queries the response was YES. [2022-12-12 15:21:54,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152595 conditions, 40561 events. 29546/40561 cut-off events. For 142174/142174 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 231143 event pairs, 16446 based on Foata normal form. 4/33459 useless extension candidates. Maximal degree in co-relation 152490. Up to 37467 conditions per place. [2022-12-12 15:21:54,188 INFO L137 encePairwiseOnDemand]: 46/49 looper letters, 165 selfloop transitions, 4 changer transitions 37/206 dead transitions. [2022-12-12 15:21:54,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 206 transitions, 2101 flow [2022-12-12 15:21:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 15:21:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 15:21:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2022-12-12 15:21:54,189 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.49489795918367346 [2022-12-12 15:21:54,189 INFO L175 Difference]: Start difference. First operand has 108 places, 156 transitions, 1486 flow. Second operand 4 states and 97 transitions. [2022-12-12 15:21:54,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 206 transitions, 2101 flow [2022-12-12 15:21:54,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 206 transitions, 1990 flow, removed 48 selfloop flow, removed 2 redundant places. [2022-12-12 15:21:54,726 INFO L231 Difference]: Finished difference. Result has 109 places, 144 transitions, 1223 flow [2022-12-12 15:21:54,726 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1223, PETRI_PLACES=109, PETRI_TRANSITIONS=144} [2022-12-12 15:21:54,726 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2022-12-12 15:21:54,726 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 144 transitions, 1223 flow [2022-12-12 15:21:54,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:54,726 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:54,727 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:21:54,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-12 15:21:54,727 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:21:54,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:54,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1320017998, now seen corresponding path program 1 times [2022-12-12 15:21:54,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:54,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23757237] [2022-12-12 15:21:54,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:54,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:54,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:54,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23757237] [2022-12-12 15:21:54,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23757237] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:21:54,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136018072] [2022-12-12 15:21:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:54,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:21:54,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:21:54,932 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 15:21:54,934 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 15:21:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:55,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 15:21:55,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:21:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:55,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:21:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:55,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136018072] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:21:55,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:21:55,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-12 15:21:55,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021899787] [2022-12-12 15:21:55,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:21:55,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 15:21:55,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 15:21:55,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-12 15:21:55,246 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:21:55,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 144 transitions, 1223 flow. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:55,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:55,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:21:55,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:22:00,615 INFO L130 PetriNetUnfolder]: 28503/39084 cut-off events. [2022-12-12 15:22:00,615 INFO L131 PetriNetUnfolder]: For 127495/127495 co-relation queries the response was YES. [2022-12-12 15:22:00,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144828 conditions, 39084 events. 28503/39084 cut-off events. For 127495/127495 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 221374 event pairs, 10830 based on Foata normal form. 4/32190 useless extension candidates. Maximal degree in co-relation 144754. Up to 37502 conditions per place. [2022-12-12 15:22:00,950 INFO L137 encePairwiseOnDemand]: 45/49 looper letters, 130 selfloop transitions, 14 changer transitions 43/187 dead transitions. [2022-12-12 15:22:00,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 1838 flow [2022-12-12 15:22:00,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 15:22:00,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 15:22:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2022-12-12 15:22:00,951 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2022-12-12 15:22:00,951 INFO L175 Difference]: Start difference. First operand has 109 places, 144 transitions, 1223 flow. Second operand 4 states and 88 transitions. [2022-12-12 15:22:00,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 1838 flow [2022-12-12 15:22:01,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 187 transitions, 1768 flow, removed 33 selfloop flow, removed 3 redundant places. [2022-12-12 15:22:01,303 INFO L231 Difference]: Finished difference. Result has 110 places, 131 transitions, 1145 flow [2022-12-12 15:22:01,303 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1145, PETRI_PLACES=110, PETRI_TRANSITIONS=131} [2022-12-12 15:22:01,303 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 64 predicate places. [2022-12-12 15:22:01,304 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 131 transitions, 1145 flow [2022-12-12 15:22:01,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:22:01,304 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:22:01,304 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:22:01,310 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 15:22:01,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-12 15:22:01,504 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:22:01,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:22:01,505 INFO L85 PathProgramCache]: Analyzing trace with hash -870719501, now seen corresponding path program 1 times [2022-12-12 15:22:01,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:22:01,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500202664] [2022-12-12 15:22:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:22:01,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:22:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:22:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:22:01,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:22:01,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500202664] [2022-12-12 15:22:01,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500202664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:22:01,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861015391] [2022-12-12 15:22:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:22:01,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:22:01,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:22:01,734 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 15:22:01,736 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 15:22:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:22:01,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 15:22:01,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:22:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:22:02,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:22:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:22:02,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861015391] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:22:02,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:22:02,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2022-12-12 15:22:02,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780901960] [2022-12-12 15:22:02,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:22:02,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 15:22:02,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:22:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 15:22:02,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-12 15:22:02,202 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:22:02,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 131 transitions, 1145 flow. Second operand has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 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 15:22:02,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:22:02,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:22:02,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:22:08,480 INFO L130 PetriNetUnfolder]: 33018/45250 cut-off events. [2022-12-12 15:22:08,481 INFO L131 PetriNetUnfolder]: For 123275/123275 co-relation queries the response was YES. [2022-12-12 15:22:08,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161263 conditions, 45250 events. 33018/45250 cut-off events. For 123275/123275 co-relation queries the response was YES. Maximal size of possible extension queue 1149. Compared 264011 event pairs, 7501 based on Foata normal form. 1/37153 useless extension candidates. Maximal degree in co-relation 161183. Up to 26473 conditions per place. [2022-12-12 15:22:08,806 INFO L137 encePairwiseOnDemand]: 41/49 looper letters, 221 selfloop transitions, 30 changer transitions 23/274 dead transitions. [2022-12-12 15:22:08,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 274 transitions, 2353 flow [2022-12-12 15:22:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:22:08,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:22:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2022-12-12 15:22:08,812 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5014577259475219 [2022-12-12 15:22:08,812 INFO L175 Difference]: Start difference. First operand has 110 places, 131 transitions, 1145 flow. Second operand 7 states and 172 transitions. [2022-12-12 15:22:08,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 274 transitions, 2353 flow [2022-12-12 15:22:09,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 274 transitions, 2305 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-12 15:22:09,225 INFO L231 Difference]: Finished difference. Result has 112 places, 145 transitions, 1370 flow [2022-12-12 15:22:09,225 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1370, PETRI_PLACES=112, PETRI_TRANSITIONS=145} [2022-12-12 15:22:09,225 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 66 predicate places. [2022-12-12 15:22:09,226 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 145 transitions, 1370 flow [2022-12-12 15:22:09,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 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 15:22:09,226 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:22:09,226 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:22:09,230 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 15:22:09,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:22:09,428 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:22:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:22:09,428 INFO L85 PathProgramCache]: Analyzing trace with hash 948790981, now seen corresponding path program 2 times [2022-12-12 15:22:09,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:22:09,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311047132] [2022-12-12 15:22:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:22:09,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:22:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:22:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:22:09,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:22:09,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311047132] [2022-12-12 15:22:09,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311047132] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:22:09,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:22:09,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 15:22:09,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769375634] [2022-12-12 15:22:09,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:22:09,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 15:22:09,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:22:09,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 15:22:09,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 15:22:09,655 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:22:09,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 145 transitions, 1370 flow. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 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 15:22:09,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:22:09,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:22:09,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:22:16,361 INFO L130 PetriNetUnfolder]: 35578/49127 cut-off events. [2022-12-12 15:22:16,361 INFO L131 PetriNetUnfolder]: For 164363/164363 co-relation queries the response was YES. [2022-12-12 15:22:16,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181234 conditions, 49127 events. 35578/49127 cut-off events. For 164363/164363 co-relation queries the response was YES. Maximal size of possible extension queue 1248. Compared 291148 event pairs, 18439 based on Foata normal form. 6/40387 useless extension candidates. Maximal degree in co-relation 181159. Up to 39896 conditions per place. [2022-12-12 15:22:16,832 INFO L137 encePairwiseOnDemand]: 46/49 looper letters, 165 selfloop transitions, 7 changer transitions 57/229 dead transitions. [2022-12-12 15:22:16,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 229 transitions, 2292 flow [2022-12-12 15:22:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 15:22:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 15:22:16,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2022-12-12 15:22:16,833 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.576530612244898 [2022-12-12 15:22:16,833 INFO L175 Difference]: Start difference. First operand has 112 places, 145 transitions, 1370 flow. Second operand 4 states and 113 transitions. [2022-12-12 15:22:16,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 229 transitions, 2292 flow [2022-12-12 15:22:17,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 229 transitions, 2259 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-12-12 15:22:17,477 INFO L231 Difference]: Finished difference. Result has 113 places, 135 transitions, 1252 flow [2022-12-12 15:22:17,478 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1252, PETRI_PLACES=113, PETRI_TRANSITIONS=135} [2022-12-12 15:22:17,478 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 67 predicate places. [2022-12-12 15:22:17,478 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 135 transitions, 1252 flow [2022-12-12 15:22:17,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 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 15:22:17,478 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:22:17,478 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:22:17,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-12 15:22:17,478 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:22:17,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:22:17,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2142043950, now seen corresponding path program 2 times [2022-12-12 15:22:17,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:22:17,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205890531] [2022-12-12 15:22:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:22:17,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:22:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:22:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:22:17,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:22:17,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205890531] [2022-12-12 15:22:17,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205890531] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:22:17,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:22:17,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 15:22:17,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532417659] [2022-12-12 15:22:17,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:22:17,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 15:22:17,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:22:17,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 15:22:17,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 15:22:17,689 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:22:17,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 135 transitions, 1252 flow. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 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 15:22:17,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:22:17,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:22:17,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:22:23,924 INFO L130 PetriNetUnfolder]: 31813/43339 cut-off events. [2022-12-12 15:22:23,925 INFO L131 PetriNetUnfolder]: For 164561/164561 co-relation queries the response was YES. [2022-12-12 15:22:24,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164177 conditions, 43339 events. 31813/43339 cut-off events. For 164561/164561 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 243354 event pairs, 18867 based on Foata normal form. 5/35510 useless extension candidates. Maximal degree in co-relation 164141. Up to 42024 conditions per place. [2022-12-12 15:22:24,270 INFO L137 encePairwiseOnDemand]: 46/49 looper letters, 109 selfloop transitions, 0 changer transitions 67/176 dead transitions. [2022-12-12 15:22:24,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 176 transitions, 1875 flow [2022-12-12 15:22:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 15:22:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 15:22:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2022-12-12 15:22:24,271 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.413265306122449 [2022-12-12 15:22:24,271 INFO L175 Difference]: Start difference. First operand has 113 places, 135 transitions, 1252 flow. Second operand 4 states and 81 transitions. [2022-12-12 15:22:24,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 176 transitions, 1875 flow [2022-12-12 15:22:25,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 176 transitions, 1848 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-12-12 15:22:25,092 INFO L231 Difference]: Finished difference. Result has 108 places, 109 transitions, 877 flow [2022-12-12 15:22:25,092 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=877, PETRI_PLACES=108, PETRI_TRANSITIONS=109} [2022-12-12 15:22:25,092 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 62 predicate places. [2022-12-12 15:22:25,092 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 109 transitions, 877 flow [2022-12-12 15:22:25,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 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 15:22:25,093 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:22:25,093 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:22:25,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-12 15:22:25,093 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:22:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:22:25,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1395194379, now seen corresponding path program 3 times [2022-12-12 15:22:25,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:22:25,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146925508] [2022-12-12 15:22:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:22:25,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:22:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:22:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:22:25,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:22:25,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146925508] [2022-12-12 15:22:25,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146925508] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:22:25,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628435065] [2022-12-12 15:22:25,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:22:25,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:22:25,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:22:25,367 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 15:22:25,370 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 15:22:25,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 15:22:25,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:22:25,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 15:22:25,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:22:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:22:25,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:22:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:22:25,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628435065] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:22:25,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:22:25,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-12-12 15:22:25,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961400536] [2022-12-12 15:22:25,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:22:25,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 15:22:25,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:22:25,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 15:22:25,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-12 15:22:25,841 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:22:25,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 109 transitions, 877 flow. Second operand has 11 states, 10 states have (on average 6.4) internal successors, (64), 11 states have internal predecessors, (64), 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 15:22:25,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:22:25,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:22:25,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:22:32,086 INFO L130 PetriNetUnfolder]: 32473/44186 cut-off events. [2022-12-12 15:22:32,087 INFO L131 PetriNetUnfolder]: For 151539/151539 co-relation queries the response was YES. [2022-12-12 15:22:32,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162377 conditions, 44186 events. 32473/44186 cut-off events. For 151539/151539 co-relation queries the response was YES. Maximal size of possible extension queue 1080. Compared 247943 event pairs, 9922 based on Foata normal form. 2/36234 useless extension candidates. Maximal degree in co-relation 162344. Up to 39474 conditions per place. [2022-12-12 15:22:32,392 INFO L137 encePairwiseOnDemand]: 39/49 looper letters, 197 selfloop transitions, 25 changer transitions 29/251 dead transitions. [2022-12-12 15:22:32,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 251 transitions, 2004 flow [2022-12-12 15:22:32,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 15:22:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 15:22:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2022-12-12 15:22:32,396 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2022-12-12 15:22:32,396 INFO L175 Difference]: Start difference. First operand has 108 places, 109 transitions, 877 flow. Second operand 8 states and 172 transitions. [2022-12-12 15:22:32,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 251 transitions, 2004 flow [2022-12-12 15:22:32,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 251 transitions, 1886 flow, removed 53 selfloop flow, removed 5 redundant places. [2022-12-12 15:22:32,951 INFO L231 Difference]: Finished difference. Result has 106 places, 118 transitions, 986 flow [2022-12-12 15:22:32,951 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=986, PETRI_PLACES=106, PETRI_TRANSITIONS=118} [2022-12-12 15:22:32,952 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 60 predicate places. [2022-12-12 15:22:32,952 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 118 transitions, 986 flow [2022-12-12 15:22:32,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.4) internal successors, (64), 11 states have internal predecessors, (64), 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 15:22:32,952 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:22:32,952 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:22:32,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-12 15:22:33,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:22:33,153 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:22:33,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:22:33,154 INFO L85 PathProgramCache]: Analyzing trace with hash 649648091, now seen corresponding path program 4 times [2022-12-12 15:22:33,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:22:33,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843679086] [2022-12-12 15:22:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:22:33,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:22:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:22:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:22:33,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:22:33,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843679086] [2022-12-12 15:22:33,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843679086] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:22:33,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:22:33,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 15:22:33,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060628024] [2022-12-12 15:22:33,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:22:33,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:22:33,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:22:33,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:22:33,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 15:22:33,364 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:22:33,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 118 transitions, 986 flow. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 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 15:22:33,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:22:33,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:22:33,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:22:39,228 INFO L130 PetriNetUnfolder]: 32194/43732 cut-off events. [2022-12-12 15:22:39,228 INFO L131 PetriNetUnfolder]: For 144666/144666 co-relation queries the response was YES. [2022-12-12 15:22:39,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155362 conditions, 43732 events. 32194/43732 cut-off events. For 144666/144666 co-relation queries the response was YES. Maximal size of possible extension queue 1070. Compared 244076 event pairs, 4775 based on Foata normal form. 2/35822 useless extension candidates. Maximal degree in co-relation 155329. Up to 23393 conditions per place. [2022-12-12 15:22:39,485 INFO L137 encePairwiseOnDemand]: 42/49 looper letters, 182 selfloop transitions, 25 changer transitions 46/253 dead transitions. [2022-12-12 15:22:39,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 253 transitions, 2216 flow [2022-12-12 15:22:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:22:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:22:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2022-12-12 15:22:39,486 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2022-12-12 15:22:39,486 INFO L175 Difference]: Start difference. First operand has 106 places, 118 transitions, 986 flow. Second operand 6 states and 158 transitions. [2022-12-12 15:22:39,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 253 transitions, 2216 flow [2022-12-12 15:22:39,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 253 transitions, 2165 flow, removed 17 selfloop flow, removed 3 redundant places. [2022-12-12 15:22:39,977 INFO L231 Difference]: Finished difference. Result has 110 places, 112 transitions, 1006 flow [2022-12-12 15:22:39,978 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1006, PETRI_PLACES=110, PETRI_TRANSITIONS=112} [2022-12-12 15:22:39,978 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 64 predicate places. [2022-12-12 15:22:39,978 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 112 transitions, 1006 flow [2022-12-12 15:22:39,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 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 15:22:39,978 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:22:39,978 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:22:39,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-12 15:22:39,978 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:22:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:22:39,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1908549743, now seen corresponding path program 1 times [2022-12-12 15:22:39,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:22:39,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939927379] [2022-12-12 15:22:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:22:39,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:22:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:22:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:22:41,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:22:41,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939927379] [2022-12-12 15:22:41,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939927379] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:22:41,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275693829] [2022-12-12 15:22:41,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:22:41,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:22:41,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:22:41,151 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 15:22:41,152 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 15:22:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:22:41,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 15:22:41,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:22:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:22:41,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:22:42,338 INFO L321 Elim1Store]: treesize reduction 27, result has 74.3 percent of original size [2022-12-12 15:22:42,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 119 [2022-12-12 15:22:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:22:42,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275693829] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:22:42,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:22:42,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 23 [2022-12-12 15:22:42,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246536500] [2022-12-12 15:22:42,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:22:42,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 15:22:42,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:22:42,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 15:22:42,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-12-12 15:22:42,393 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:22:42,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 112 transitions, 1006 flow. Second operand has 23 states, 23 states have (on average 4.434782608695652) internal successors, (102), 23 states have internal predecessors, (102), 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 15:22:42,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:22:42,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:22:42,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:23:10,130 INFO L130 PetriNetUnfolder]: 115862/157031 cut-off events. [2022-12-12 15:23:10,130 INFO L131 PetriNetUnfolder]: For 599372/599372 co-relation queries the response was YES. [2022-12-12 15:23:11,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557717 conditions, 157031 events. 115862/157031 cut-off events. For 599372/599372 co-relation queries the response was YES. Maximal size of possible extension queue 4121. Compared 1024739 event pairs, 10415 based on Foata normal form. 2/129817 useless extension candidates. Maximal degree in co-relation 557682. Up to 31167 conditions per place. [2022-12-12 15:23:11,573 INFO L137 encePairwiseOnDemand]: 30/49 looper letters, 1003 selfloop transitions, 312 changer transitions 272/1587 dead transitions. [2022-12-12 15:23:11,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 1587 transitions, 13155 flow [2022-12-12 15:23:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-12 15:23:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-12-12 15:23:11,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 1154 transitions. [2022-12-12 15:23:11,577 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4060520760028149 [2022-12-12 15:23:11,577 INFO L175 Difference]: Start difference. First operand has 110 places, 112 transitions, 1006 flow. Second operand 58 states and 1154 transitions. [2022-12-12 15:23:11,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 1587 transitions, 13155 flow [2022-12-12 15:23:17,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 1587 transitions, 12250 flow, removed 193 selfloop flow, removed 6 redundant places. [2022-12-12 15:23:17,510 INFO L231 Difference]: Finished difference. Result has 194 places, 431 transitions, 4842 flow [2022-12-12 15:23:17,510 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=4842, PETRI_PLACES=194, PETRI_TRANSITIONS=431} [2022-12-12 15:23:17,511 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 148 predicate places. [2022-12-12 15:23:17,511 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 431 transitions, 4842 flow [2022-12-12 15:23:17,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.434782608695652) internal successors, (102), 23 states have internal predecessors, (102), 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 15:23:17,511 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:23:17,511 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:23:17,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-12 15:23:17,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:23:17,713 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:23:17,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:23:17,713 INFO L85 PathProgramCache]: Analyzing trace with hash 912340989, now seen corresponding path program 2 times [2022-12-12 15:23:17,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:23:17,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991145856] [2022-12-12 15:23:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:23:17,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:23:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:23:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:23:18,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:23:18,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991145856] [2022-12-12 15:23:18,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991145856] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:23:18,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987525476] [2022-12-12 15:23:18,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:23:18,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:23:18,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:23:18,817 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 15:23:18,821 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 15:23:19,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:23:19,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:23:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 15:23:19,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:23:19,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2022-12-12 15:23:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:23:19,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:23:19,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:23:19,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 101 [2022-12-12 15:23:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:23:20,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987525476] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:23:20,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:23:20,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 18 [2022-12-12 15:23:20,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024370357] [2022-12-12 15:23:20,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:23:20,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 15:23:20,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:23:20,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 15:23:20,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-12-12 15:23:20,071 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 15:23:20,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 431 transitions, 4842 flow. Second operand has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 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 15:23:20,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:23:20,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 15:23:20,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand