/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 08:53:28,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 08:53:28,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 08:53:28,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 08:53:28,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 08:53:28,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 08:53:28,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 08:53:28,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 08:53:28,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 08:53:28,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 08:53:28,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 08:53:28,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 08:53:28,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 08:53:28,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 08:53:28,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 08:53:28,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 08:53:28,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 08:53:28,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 08:53:28,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 08:53:28,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 08:53:28,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 08:53:28,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 08:53:28,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 08:53:28,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 08:53:28,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 08:53:28,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 08:53:28,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 08:53:28,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 08:53:28,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 08:53:28,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 08:53:28,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 08:53:28,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 08:53:28,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 08:53:28,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 08:53:28,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 08:53:28,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 08:53:28,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 08:53:28,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 08:53:28,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 08:53:28,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 08:53:28,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 08:53:28,558 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-VariableLbe.epf [2023-01-28 08:53:28,588 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 08:53:28,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 08:53:28,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 08:53:28,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 08:53:28,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 08:53:28,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 08:53:28,591 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 08:53:28,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 08:53:28,591 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 08:53:28,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 08:53:28,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 08:53:28,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 08:53:28,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 08:53:28,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 08:53:28,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 08:53:28,593 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 08:53:28,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 08:53:28,593 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 08:53:28,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 08:53:28,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 08:53:28,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 08:53:28,593 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 08:53:28,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 08:53:28,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 08:53:28,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 08:53:28,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 08:53:28,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 08:53:28,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 08:53:28,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 08:53:28,595 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 08:53:28,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 08:53:28,595 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 08:53:28,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 08:53:28,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 08:53:28,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 08:53:28,842 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 08:53:28,842 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 08:53:28,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-01-28 08:53:30,062 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 08:53:30,239 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 08:53:30,239 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-01-28 08:53:30,249 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b8ff767e/e2d365e26da2494fb486774839dad28c/FLAGcba57e2c2 [2023-01-28 08:53:30,261 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b8ff767e/e2d365e26da2494fb486774839dad28c [2023-01-28 08:53:30,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 08:53:30,264 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 08:53:30,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 08:53:30,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 08:53:30,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 08:53:30,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 08:53:30" (1/1) ... [2023-01-28 08:53:30,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f1b283b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:53:30, skipping insertion in model container [2023-01-28 08:53:30,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 08:53:30" (1/1) ... [2023-01-28 08:53:30,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 08:53:30,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 08:53:30,441 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2023-01-28 08:53:30,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 08:53:30,455 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 08:53:30,473 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2023-01-28 08:53:30,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 08:53:30,499 INFO L208 MainTranslator]: Completed translation [2023-01-28 08:53:30,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:53:30 WrapperNode [2023-01-28 08:53:30,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 08:53:30,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 08:53:30,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 08:53:30,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 08:53:30,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:53:30" (1/1) ... [2023-01-28 08:53:30,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:53:30" (1/1) ... [2023-01-28 08:53:30,564 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 198 [2023-01-28 08:53:30,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 08:53:30,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 08:53:30,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 08:53:30,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 08:53:30,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:53:30" (1/1) ... [2023-01-28 08:53:30,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:53:30" (1/1) ... [2023-01-28 08:53:30,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:53:30" (1/1) ... [2023-01-28 08:53:30,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:53:30" (1/1) ... [2023-01-28 08:53:30,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:53:30" (1/1) ... [2023-01-28 08:53:30,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:53:30" (1/1) ... [2023-01-28 08:53:30,587 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:53:30" (1/1) ... [2023-01-28 08:53:30,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:53:30" (1/1) ... [2023-01-28 08:53:30,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 08:53:30,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 08:53:30,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 08:53:30,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 08:53:30,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:53:30" (1/1) ... [2023-01-28 08:53:30,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 08:53:30,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:53:30,620 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) [2023-01-28 08:53:30,645 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 [2023-01-28 08:53:30,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 08:53:30,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 08:53:30,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 08:53:30,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 08:53:30,667 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 08:53:30,667 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 08:53:30,667 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 08:53:30,667 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 08:53:30,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 08:53:30,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 08:53:30,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 08:53:30,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 08:53:30,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 08:53:30,670 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 08:53:30,760 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 08:53:30,762 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 08:53:31,060 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 08:53:31,068 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 08:53:31,068 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-28 08:53:31,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 08:53:31 BoogieIcfgContainer [2023-01-28 08:53:31,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 08:53:31,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 08:53:31,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 08:53:31,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 08:53:31,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 08:53:30" (1/3) ... [2023-01-28 08:53:31,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2851047e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 08:53:31, skipping insertion in model container [2023-01-28 08:53:31,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:53:30" (2/3) ... [2023-01-28 08:53:31,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2851047e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 08:53:31, skipping insertion in model container [2023-01-28 08:53:31,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 08:53:31" (3/3) ... [2023-01-28 08:53:31,078 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2023-01-28 08:53:31,093 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 08:53:31,093 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 08:53:31,094 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 08:53:31,181 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 08:53:31,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 478 flow [2023-01-28 08:53:31,356 INFO L130 PetriNetUnfolder]: 21/229 cut-off events. [2023-01-28 08:53:31,356 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 08:53:31,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 229 events. 21/229 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2023-01-28 08:53:31,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 231 transitions, 478 flow [2023-01-28 08:53:31,377 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 221 transitions, 454 flow [2023-01-28 08:53:31,380 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:53:31,396 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 221 transitions, 454 flow [2023-01-28 08:53:31,399 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 221 transitions, 454 flow [2023-01-28 08:53:31,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 221 transitions, 454 flow [2023-01-28 08:53:31,434 INFO L130 PetriNetUnfolder]: 21/221 cut-off events. [2023-01-28 08:53:31,434 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 08:53:31,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 221 events. 21/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 269 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2023-01-28 08:53:31,439 INFO L119 LiptonReduction]: Number of co-enabled transitions 5400 [2023-01-28 08:53:36,936 INFO L134 LiptonReduction]: Checked pairs total: 5353 [2023-01-28 08:53:36,936 INFO L136 LiptonReduction]: Total number of compositions: 258 [2023-01-28 08:53:36,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 08:53:36,973 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;@4e79d2f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:53:36,973 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 08:53:36,980 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2023-01-28 08:53:36,980 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 08:53:36,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:53:36,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:53:36,982 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:53:36,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:53:36,987 INFO L85 PathProgramCache]: Analyzing trace with hash 659682560, now seen corresponding path program 1 times [2023-01-28 08:53:36,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:53:36,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284410285] [2023-01-28 08:53:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:36,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:53:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:53:37,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:53:37,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284410285] [2023-01-28 08:53:37,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284410285] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:53:37,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:53:37,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 08:53:37,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868491751] [2023-01-28 08:53:37,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:53:37,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:53:37,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:53:37,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:53:37,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 08:53:37,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 489 [2023-01-28 08:53:37,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 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) [2023-01-28 08:53:37,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:53:37,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 489 [2023-01-28 08:53:37,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:53:37,515 INFO L130 PetriNetUnfolder]: 53/98 cut-off events. [2023-01-28 08:53:37,515 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-01-28 08:53:37,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 98 events. 53/98 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 190 event pairs, 33 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 160. Up to 97 conditions per place. [2023-01-28 08:53:37,522 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 18 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2023-01-28 08:53:37,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 100 flow [2023-01-28 08:53:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 08:53:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 08:53:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2023-01-28 08:53:37,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3987730061349693 [2023-01-28 08:53:37,542 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2023-01-28 08:53:37,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2023-01-28 08:53:37,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:53:37,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2023-01-28 08:53:37,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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) [2023-01-28 08:53:37,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 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) [2023-01-28 08:53:37,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 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) [2023-01-28 08:53:37,558 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 52 flow. Second operand 3 states and 585 transitions. [2023-01-28 08:53:37,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 100 flow [2023-01-28 08:53:37,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 08:53:37,562 INFO L231 Difference]: Finished difference. Result has 22 places, 22 transitions, 66 flow [2023-01-28 08:53:37,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=22} [2023-01-28 08:53:37,567 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-01-28 08:53:37,567 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 22 transitions, 66 flow [2023-01-28 08:53:37,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 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) [2023-01-28 08:53:37,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:53:37,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:53:37,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 08:53:37,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:53:37,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:53:37,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1043919621, now seen corresponding path program 1 times [2023-01-28 08:53:37,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:53:37,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182751994] [2023-01-28 08:53:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:37,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:53:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 08:53:37,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:53:37,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182751994] [2023-01-28 08:53:37,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182751994] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:53:37,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497347409] [2023-01-28 08:53:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:37,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:53:37,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:53:37,665 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) [2023-01-28 08:53:37,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 08:53:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:37,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 08:53:37,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:53:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 08:53:37,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:53:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 08:53:37,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497347409] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:53:37,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:53:37,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-01-28 08:53:37,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381095259] [2023-01-28 08:53:37,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:53:37,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 08:53:37,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:53:37,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 08:53:37,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-01-28 08:53:37,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 489 [2023-01-28 08:53:37,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 22 transitions, 66 flow. Second operand has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 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) [2023-01-28 08:53:37,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:53:37,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 489 [2023-01-28 08:53:37,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:53:37,962 INFO L130 PetriNetUnfolder]: 53/104 cut-off events. [2023-01-28 08:53:37,962 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 08:53:37,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 104 events. 53/104 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 187 event pairs, 33 based on Foata normal form. 3/88 useless extension candidates. Maximal degree in co-relation 202. Up to 97 conditions per place. [2023-01-28 08:53:37,963 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 18 selfloop transitions, 10 changer transitions 0/28 dead transitions. [2023-01-28 08:53:37,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 146 flow [2023-01-28 08:53:37,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 08:53:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 08:53:37,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1156 transitions. [2023-01-28 08:53:37,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3940013633265167 [2023-01-28 08:53:37,980 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1156 transitions. [2023-01-28 08:53:37,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1156 transitions. [2023-01-28 08:53:37,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:53:37,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1156 transitions. [2023-01-28 08:53:37,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.66666666666666) internal successors, (1156), 6 states have internal predecessors, (1156), 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) [2023-01-28 08:53:37,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 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) [2023-01-28 08:53:37,989 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 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) [2023-01-28 08:53:37,989 INFO L175 Difference]: Start difference. First operand has 22 places, 22 transitions, 66 flow. Second operand 6 states and 1156 transitions. [2023-01-28 08:53:37,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 146 flow [2023-01-28 08:53:37,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 08:53:37,991 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 128 flow [2023-01-28 08:53:37,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-01-28 08:53:37,992 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2023-01-28 08:53:37,992 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 128 flow [2023-01-28 08:53:38,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 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) [2023-01-28 08:53:38,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:53:38,010 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:53:38,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 08:53:38,210 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 [2023-01-28 08:53:38,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:53:38,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:53:38,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1002026432, now seen corresponding path program 2 times [2023-01-28 08:53:38,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:53:38,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105862609] [2023-01-28 08:53:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:38,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:53:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 08:53:38,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:53:38,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105862609] [2023-01-28 08:53:38,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105862609] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:53:38,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999904140] [2023-01-28 08:53:38,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:53:38,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:53:38,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:53:38,429 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) [2023-01-28 08:53:38,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 08:53:38,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 08:53:38,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:53:38,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 08:53:38,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:53:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-01-28 08:53:38,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 08:53:38,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999904140] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:53:38,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 08:53:38,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-01-28 08:53:38,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873414290] [2023-01-28 08:53:38,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:53:38,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 08:53:38,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:53:38,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 08:53:38,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-01-28 08:53:38,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 489 [2023-01-28 08:53:38,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 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) [2023-01-28 08:53:38,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:53:38,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 489 [2023-01-28 08:53:38,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:53:38,712 INFO L130 PetriNetUnfolder]: 88/171 cut-off events. [2023-01-28 08:53:38,712 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 08:53:38,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 171 events. 88/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 478 event pairs, 33 based on Foata normal form. 4/140 useless extension candidates. Maximal degree in co-relation 330. Up to 105 conditions per place. [2023-01-28 08:53:38,714 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 41 selfloop transitions, 3 changer transitions 2/46 dead transitions. [2023-01-28 08:53:38,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 260 flow [2023-01-28 08:53:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 08:53:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 08:53:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 823 transitions. [2023-01-28 08:53:38,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4207566462167689 [2023-01-28 08:53:38,716 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 823 transitions. [2023-01-28 08:53:38,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 823 transitions. [2023-01-28 08:53:38,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:53:38,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 823 transitions. [2023-01-28 08:53:38,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 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) [2023-01-28 08:53:38,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 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) [2023-01-28 08:53:38,724 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 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) [2023-01-28 08:53:38,724 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 128 flow. Second operand 4 states and 823 transitions. [2023-01-28 08:53:38,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 260 flow [2023-01-28 08:53:38,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 244 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 08:53:38,727 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 132 flow [2023-01-28 08:53:38,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-01-28 08:53:38,728 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2023-01-28 08:53:38,729 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 132 flow [2023-01-28 08:53:38,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 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) [2023-01-28 08:53:38,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:53:38,729 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:53:38,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 08:53:38,935 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 [2023-01-28 08:53:38,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:53:38,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:53:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash 637732292, now seen corresponding path program 3 times [2023-01-28 08:53:38,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:53:38,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944982774] [2023-01-28 08:53:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:38,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:53:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 08:53:39,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:53:39,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944982774] [2023-01-28 08:53:39,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944982774] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:53:39,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648466641] [2023-01-28 08:53:39,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 08:53:39,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:53:39,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:53:39,099 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) [2023-01-28 08:53:39,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 08:53:39,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-28 08:53:39,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:53:39,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 08:53:39,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:53:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-01-28 08:53:39,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 08:53:39,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648466641] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:53:39,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 08:53:39,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-01-28 08:53:39,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754816572] [2023-01-28 08:53:39,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:53:39,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 08:53:39,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:53:39,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 08:53:39,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-01-28 08:53:39,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 489 [2023-01-28 08:53:39,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 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) [2023-01-28 08:53:39,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:53:39,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 489 [2023-01-28 08:53:39,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:53:39,390 INFO L130 PetriNetUnfolder]: 136/259 cut-off events. [2023-01-28 08:53:39,391 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 08:53:39,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 259 events. 136/259 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 831 event pairs, 60 based on Foata normal form. 2/224 useless extension candidates. Maximal degree in co-relation 602. Up to 176 conditions per place. [2023-01-28 08:53:39,393 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 48 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-01-28 08:53:39,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 304 flow [2023-01-28 08:53:39,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 08:53:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 08:53:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 822 transitions. [2023-01-28 08:53:39,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42024539877300615 [2023-01-28 08:53:39,396 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 822 transitions. [2023-01-28 08:53:39,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 822 transitions. [2023-01-28 08:53:39,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:53:39,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 822 transitions. [2023-01-28 08:53:39,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.5) internal successors, (822), 4 states have internal predecessors, (822), 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) [2023-01-28 08:53:39,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 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) [2023-01-28 08:53:39,402 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 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) [2023-01-28 08:53:39,402 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 132 flow. Second operand 4 states and 822 transitions. [2023-01-28 08:53:39,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 304 flow [2023-01-28 08:53:39,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 08:53:39,408 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 150 flow [2023-01-28 08:53:39,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-01-28 08:53:39,410 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2023-01-28 08:53:39,410 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 150 flow [2023-01-28 08:53:39,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 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) [2023-01-28 08:53:39,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:53:39,411 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:53:39,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 08:53:39,617 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 [2023-01-28 08:53:39,617 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:53:39,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:53:39,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1056425402, now seen corresponding path program 4 times [2023-01-28 08:53:39,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:53:39,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398481210] [2023-01-28 08:53:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:39,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:53:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 08:53:39,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:53:39,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398481210] [2023-01-28 08:53:39,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398481210] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:53:39,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451738403] [2023-01-28 08:53:39,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 08:53:39,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:53:39,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:53:39,749 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) [2023-01-28 08:53:39,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 08:53:39,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 08:53:39,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:53:39,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 08:53:39,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:53:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 08:53:39,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:53:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 08:53:39,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451738403] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:53:39,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:53:39,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 08:53:39,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000332332] [2023-01-28 08:53:39,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:53:39,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 08:53:39,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:53:39,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 08:53:39,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-01-28 08:53:39,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 489 [2023-01-28 08:53:39,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 189.15384615384616) internal successors, (2459), 13 states have internal predecessors, (2459), 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) [2023-01-28 08:53:39,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:53:39,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 489 [2023-01-28 08:53:39,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:53:40,051 INFO L130 PetriNetUnfolder]: 136/261 cut-off events. [2023-01-28 08:53:40,051 INFO L131 PetriNetUnfolder]: For 230/230 co-relation queries the response was YES. [2023-01-28 08:53:40,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 261 events. 136/261 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 791 event pairs, 104 based on Foata normal form. 1/243 useless extension candidates. Maximal degree in co-relation 722. Up to 252 conditions per place. [2023-01-28 08:53:40,053 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 22 selfloop transitions, 12 changer transitions 0/34 dead transitions. [2023-01-28 08:53:40,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 230 flow [2023-01-28 08:53:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 08:53:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 08:53:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1341 transitions. [2023-01-28 08:53:40,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39176161262050835 [2023-01-28 08:53:40,057 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1341 transitions. [2023-01-28 08:53:40,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1341 transitions. [2023-01-28 08:53:40,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:53:40,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1341 transitions. [2023-01-28 08:53:40,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 191.57142857142858) internal successors, (1341), 7 states have internal predecessors, (1341), 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) [2023-01-28 08:53:40,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 489.0) internal successors, (3912), 8 states have internal predecessors, (3912), 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) [2023-01-28 08:53:40,066 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 489.0) internal successors, (3912), 8 states have internal predecessors, (3912), 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) [2023-01-28 08:53:40,066 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 150 flow. Second operand 7 states and 1341 transitions. [2023-01-28 08:53:40,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 230 flow [2023-01-28 08:53:40,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 226 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 08:53:40,069 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 192 flow [2023-01-28 08:53:40,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-01-28 08:53:40,071 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2023-01-28 08:53:40,071 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 192 flow [2023-01-28 08:53:40,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 189.15384615384616) internal successors, (2459), 13 states have internal predecessors, (2459), 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) [2023-01-28 08:53:40,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:53:40,072 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:53:40,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 08:53:40,278 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 [2023-01-28 08:53:40,278 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:53:40,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:53:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash -871821335, now seen corresponding path program 5 times [2023-01-28 08:53:40,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:53:40,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991902411] [2023-01-28 08:53:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:40,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:53:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:53:40,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:53:40,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991902411] [2023-01-28 08:53:40,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991902411] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:53:40,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:53:40,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 08:53:40,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973084718] [2023-01-28 08:53:40,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:53:40,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 08:53:40,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:53:40,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 08:53:40,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 08:53:40,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 489 [2023-01-28 08:53:40,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 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) [2023-01-28 08:53:40,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:53:40,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 489 [2023-01-28 08:53:40,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:53:40,575 INFO L130 PetriNetUnfolder]: 158/299 cut-off events. [2023-01-28 08:53:40,575 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-01-28 08:53:40,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 856 conditions, 299 events. 158/299 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1083 event pairs, 18 based on Foata normal form. 16/297 useless extension candidates. Maximal degree in co-relation 778. Up to 246 conditions per place. [2023-01-28 08:53:40,577 INFO L137 encePairwiseOnDemand]: 483/489 looper letters, 45 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-01-28 08:53:40,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 352 flow [2023-01-28 08:53:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 08:53:40,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 08:53:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 818 transitions. [2023-01-28 08:53:40,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418200408997955 [2023-01-28 08:53:40,579 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 818 transitions. [2023-01-28 08:53:40,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 818 transitions. [2023-01-28 08:53:40,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:53:40,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 818 transitions. [2023-01-28 08:53:40,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 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) [2023-01-28 08:53:40,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 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) [2023-01-28 08:53:40,585 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 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) [2023-01-28 08:53:40,585 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 192 flow. Second operand 4 states and 818 transitions. [2023-01-28 08:53:40,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 352 flow [2023-01-28 08:53:40,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 328 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-01-28 08:53:40,587 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 199 flow [2023-01-28 08:53:40,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-01-28 08:53:40,587 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 21 predicate places. [2023-01-28 08:53:40,588 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 199 flow [2023-01-28 08:53:40,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 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) [2023-01-28 08:53:40,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:53:40,588 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:53:40,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 08:53:40,588 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:53:40,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:53:40,589 INFO L85 PathProgramCache]: Analyzing trace with hash -29914819, now seen corresponding path program 6 times [2023-01-28 08:53:40,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:53:40,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647589508] [2023-01-28 08:53:40,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:40,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:53:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:53:40,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:53:40,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647589508] [2023-01-28 08:53:40,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647589508] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:53:40,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:53:40,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 08:53:40,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938277224] [2023-01-28 08:53:40,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:53:40,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 08:53:40,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:53:40,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 08:53:40,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 08:53:40,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 489 [2023-01-28 08:53:40,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 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) [2023-01-28 08:53:40,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:53:40,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 489 [2023-01-28 08:53:40,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:53:40,918 INFO L130 PetriNetUnfolder]: 160/299 cut-off events. [2023-01-28 08:53:40,919 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-01-28 08:53:40,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 299 events. 160/299 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 976 event pairs, 34 based on Foata normal form. 8/285 useless extension candidates. Maximal degree in co-relation 872. Up to 206 conditions per place. [2023-01-28 08:53:40,921 INFO L137 encePairwiseOnDemand]: 483/489 looper letters, 45 selfloop transitions, 6 changer transitions 1/52 dead transitions. [2023-01-28 08:53:40,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 367 flow [2023-01-28 08:53:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 08:53:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 08:53:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 817 transitions. [2023-01-28 08:53:40,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176891615541922 [2023-01-28 08:53:40,924 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 817 transitions. [2023-01-28 08:53:40,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 817 transitions. [2023-01-28 08:53:40,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:53:40,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 817 transitions. [2023-01-28 08:53:40,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 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) [2023-01-28 08:53:40,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 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) [2023-01-28 08:53:40,929 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 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) [2023-01-28 08:53:40,929 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 199 flow. Second operand 4 states and 817 transitions. [2023-01-28 08:53:40,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 367 flow [2023-01-28 08:53:40,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 08:53:40,932 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 234 flow [2023-01-28 08:53:40,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-01-28 08:53:40,933 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 25 predicate places. [2023-01-28 08:53:40,933 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 234 flow [2023-01-28 08:53:40,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 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) [2023-01-28 08:53:40,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:53:40,934 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:53:40,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 08:53:40,934 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:53:40,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:53:40,934 INFO L85 PathProgramCache]: Analyzing trace with hash 537168199, now seen corresponding path program 1 times [2023-01-28 08:53:40,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:53:40,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301349423] [2023-01-28 08:53:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:40,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:53:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-01-28 08:53:41,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:53:41,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301349423] [2023-01-28 08:53:41,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301349423] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:53:41,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:53:41,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 08:53:41,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961376993] [2023-01-28 08:53:41,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:53:41,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 08:53:41,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:53:41,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 08:53:41,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 08:53:41,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 489 [2023-01-28 08:53:41,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 234 flow. Second operand has 4 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 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) [2023-01-28 08:53:41,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:53:41,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 489 [2023-01-28 08:53:41,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:53:41,347 INFO L130 PetriNetUnfolder]: 145/270 cut-off events. [2023-01-28 08:53:41,347 INFO L131 PetriNetUnfolder]: For 591/591 co-relation queries the response was YES. [2023-01-28 08:53:41,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 270 events. 145/270 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 847 event pairs, 54 based on Foata normal form. 6/258 useless extension candidates. Maximal degree in co-relation 847. Up to 182 conditions per place. [2023-01-28 08:53:41,350 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 46 selfloop transitions, 6 changer transitions 3/55 dead transitions. [2023-01-28 08:53:41,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 415 flow [2023-01-28 08:53:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 08:53:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 08:53:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 821 transitions. [2023-01-28 08:53:41,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41973415132924335 [2023-01-28 08:53:41,353 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 821 transitions. [2023-01-28 08:53:41,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 821 transitions. [2023-01-28 08:53:41,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:53:41,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 821 transitions. [2023-01-28 08:53:41,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 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) [2023-01-28 08:53:41,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 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) [2023-01-28 08:53:41,358 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 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) [2023-01-28 08:53:41,358 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 234 flow. Second operand 4 states and 821 transitions. [2023-01-28 08:53:41,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 415 flow [2023-01-28 08:53:41,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 408 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 08:53:41,361 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 257 flow [2023-01-28 08:53:41,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-01-28 08:53:41,363 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2023-01-28 08:53:41,363 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 257 flow [2023-01-28 08:53:41,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 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) [2023-01-28 08:53:41,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:53:41,363 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:53:41,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 08:53:41,364 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:53:41,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:53:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1727705847, now seen corresponding path program 1 times [2023-01-28 08:53:41,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:53:41,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626588865] [2023-01-28 08:53:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:41,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:53:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-01-28 08:53:41,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:53:41,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626588865] [2023-01-28 08:53:41,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626588865] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:53:41,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:53:41,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 08:53:41,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513373316] [2023-01-28 08:53:41,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:53:41,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 08:53:41,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:53:41,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 08:53:41,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 08:53:41,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 489 [2023-01-28 08:53:41,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 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) [2023-01-28 08:53:41,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:53:41,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 489 [2023-01-28 08:53:41,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:53:41,655 INFO L130 PetriNetUnfolder]: 125/230 cut-off events. [2023-01-28 08:53:41,655 INFO L131 PetriNetUnfolder]: For 663/663 co-relation queries the response was YES. [2023-01-28 08:53:41,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 230 events. 125/230 cut-off events. For 663/663 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 639 event pairs, 51 based on Foata normal form. 12/224 useless extension candidates. Maximal degree in co-relation 757. Up to 177 conditions per place. [2023-01-28 08:53:41,657 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 47 selfloop transitions, 7 changer transitions 1/55 dead transitions. [2023-01-28 08:53:41,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 439 flow [2023-01-28 08:53:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 08:53:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 08:53:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 821 transitions. [2023-01-28 08:53:41,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41973415132924335 [2023-01-28 08:53:41,660 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 821 transitions. [2023-01-28 08:53:41,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 821 transitions. [2023-01-28 08:53:41,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:53:41,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 821 transitions. [2023-01-28 08:53:41,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 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) [2023-01-28 08:53:41,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 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) [2023-01-28 08:53:41,665 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 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) [2023-01-28 08:53:41,665 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 257 flow. Second operand 4 states and 821 transitions. [2023-01-28 08:53:41,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 439 flow [2023-01-28 08:53:41,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 413 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-01-28 08:53:41,668 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 270 flow [2023-01-28 08:53:41,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-01-28 08:53:41,669 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2023-01-28 08:53:41,669 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 270 flow [2023-01-28 08:53:41,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 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) [2023-01-28 08:53:41,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:53:41,669 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:53:41,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 08:53:41,670 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:53:41,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:53:41,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1304321571, now seen corresponding path program 1 times [2023-01-28 08:53:41,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:53:41,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324740418] [2023-01-28 08:53:41,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:41,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:53:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:53:42,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:53:42,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324740418] [2023-01-28 08:53:42,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324740418] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:53:42,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335385077] [2023-01-28 08:53:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:42,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:53:42,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:53:42,717 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) [2023-01-28 08:53:42,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 08:53:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:42,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 08:53:42,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:53:43,035 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:53:43,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-28 08:53:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:53:43,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:53:43,827 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:53:43,828 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 42 treesize of output 50 [2023-01-28 08:53:43,864 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:53:43,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-01-28 08:53:43,868 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:53:43,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-01-28 08:53:43,872 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:53:43,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-01-28 08:53:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:53:43,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335385077] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:53:43,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:53:43,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-01-28 08:53:43,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538310213] [2023-01-28 08:53:43,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:53:43,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 08:53:43,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:53:43,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 08:53:43,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-01-28 08:53:43,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-28 08:53:43,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 270 flow. Second operand has 24 states, 24 states have (on average 162.04166666666666) internal successors, (3889), 24 states have internal predecessors, (3889), 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) [2023-01-28 08:53:43,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:53:43,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-28 08:53:43,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:53:44,979 INFO L130 PetriNetUnfolder]: 233/427 cut-off events. [2023-01-28 08:53:44,979 INFO L131 PetriNetUnfolder]: For 1029/1029 co-relation queries the response was YES. [2023-01-28 08:53:44,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 427 events. 233/427 cut-off events. For 1029/1029 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1621 event pairs, 12 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 1404. Up to 150 conditions per place. [2023-01-28 08:53:44,982 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 71 selfloop transitions, 26 changer transitions 14/111 dead transitions. [2023-01-28 08:53:44,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 111 transitions, 796 flow [2023-01-28 08:53:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 08:53:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 08:53:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2490 transitions. [2023-01-28 08:53:44,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3394683026584867 [2023-01-28 08:53:44,988 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2490 transitions. [2023-01-28 08:53:44,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2490 transitions. [2023-01-28 08:53:44,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:53:44,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2490 transitions. [2023-01-28 08:53:44,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.0) internal successors, (2490), 15 states have internal predecessors, (2490), 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) [2023-01-28 08:53:45,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:53:45,002 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:53:45,002 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 270 flow. Second operand 15 states and 2490 transitions. [2023-01-28 08:53:45,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 111 transitions, 796 flow [2023-01-28 08:53:45,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 111 transitions, 744 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-01-28 08:53:45,006 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 451 flow [2023-01-28 08:53:45,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=451, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2023-01-28 08:53:45,008 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 48 predicate places. [2023-01-28 08:53:45,008 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 451 flow [2023-01-28 08:53:45,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 162.04166666666666) internal successors, (3889), 24 states have internal predecessors, (3889), 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) [2023-01-28 08:53:45,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:53:45,015 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:53:45,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 08:53:45,222 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,SelfDestructingSolverStorable9 [2023-01-28 08:53:45,222 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:53:45,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:53:45,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1278507897, now seen corresponding path program 2 times [2023-01-28 08:53:45,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:53:45,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326399] [2023-01-28 08:53:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:45,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:53:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:53:46,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:53:46,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326399] [2023-01-28 08:53:46,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326399] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:53:46,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519196703] [2023-01-28 08:53:46,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:53:46,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:53:46,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:53:46,194 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) [2023-01-28 08:53:46,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 08:53:46,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:53:46,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:53:46,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 08:53:46,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:53:46,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:53:46,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-28 08:53:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:53:46,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:53:47,006 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-01-28 08:53:47,006 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 185 treesize of output 103 [2023-01-28 08:53:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:53:47,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519196703] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:53:47,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:53:47,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-01-28 08:53:47,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244187871] [2023-01-28 08:53:47,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:53:47,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 08:53:47,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:53:47,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 08:53:47,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-01-28 08:53:47,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-28 08:53:47,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 451 flow. Second operand has 24 states, 24 states have (on average 163.04166666666666) internal successors, (3913), 24 states have internal predecessors, (3913), 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) [2023-01-28 08:53:47,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:53:47,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-28 08:53:47,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:53:47,994 INFO L130 PetriNetUnfolder]: 268/482 cut-off events. [2023-01-28 08:53:47,994 INFO L131 PetriNetUnfolder]: For 1693/1693 co-relation queries the response was YES. [2023-01-28 08:53:47,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 482 events. 268/482 cut-off events. For 1693/1693 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1861 event pairs, 34 based on Foata normal form. 1/483 useless extension candidates. Maximal degree in co-relation 1958. Up to 327 conditions per place. [2023-01-28 08:53:47,998 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 64 selfloop transitions, 33 changer transitions 4/101 dead transitions. [2023-01-28 08:53:47,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 101 transitions, 891 flow [2023-01-28 08:53:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 08:53:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 08:53:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2322 transitions. [2023-01-28 08:53:48,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33917616126205086 [2023-01-28 08:53:48,004 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2322 transitions. [2023-01-28 08:53:48,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2322 transitions. [2023-01-28 08:53:48,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:53:48,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2322 transitions. [2023-01-28 08:53:48,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 165.85714285714286) internal successors, (2322), 14 states have internal predecessors, (2322), 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) [2023-01-28 08:53:48,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:53:48,016 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:53:48,017 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 451 flow. Second operand 14 states and 2322 transitions. [2023-01-28 08:53:48,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 101 transitions, 891 flow [2023-01-28 08:53:48,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 827 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-01-28 08:53:48,022 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 645 flow [2023-01-28 08:53:48,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=645, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-01-28 08:53:48,023 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 59 predicate places. [2023-01-28 08:53:48,023 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 645 flow [2023-01-28 08:53:48,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 163.04166666666666) internal successors, (3913), 24 states have internal predecessors, (3913), 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) [2023-01-28 08:53:48,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:53:48,024 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:53:48,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 08:53:48,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:53:48,231 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:53:48,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:53:48,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1488168775, now seen corresponding path program 3 times [2023-01-28 08:53:48,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:53:48,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643000251] [2023-01-28 08:53:48,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:48,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:53:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 08:53:49,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:53:49,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643000251] [2023-01-28 08:53:49,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643000251] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:53:49,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828216793] [2023-01-28 08:53:49,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 08:53:49,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:53:49,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:53:49,603 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) [2023-01-28 08:53:49,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 08:53:49,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 08:53:49,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:53:49,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 08:53:49,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:53:49,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:53:49,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-28 08:53:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:53:50,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:53:50,841 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:53:50,842 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 50 treesize of output 50 [2023-01-28 08:53:50,874 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:53:50,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-01-28 08:53:50,878 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:53:50,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-01-28 08:53:50,882 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:53:50,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-01-28 08:53:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:53:50,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828216793] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:53:50,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:53:50,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 30 [2023-01-28 08:53:50,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044028910] [2023-01-28 08:53:50,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:53:50,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 08:53:50,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:53:50,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 08:53:50,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2023-01-28 08:53:50,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 489 [2023-01-28 08:53:50,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 645 flow. Second operand has 31 states, 31 states have (on average 136.90322580645162) internal successors, (4244), 31 states have internal predecessors, (4244), 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) [2023-01-28 08:53:50,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:53:50,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 489 [2023-01-28 08:53:50,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:53:52,811 INFO L130 PetriNetUnfolder]: 597/1061 cut-off events. [2023-01-28 08:53:52,811 INFO L131 PetriNetUnfolder]: For 3820/3820 co-relation queries the response was YES. [2023-01-28 08:53:52,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4645 conditions, 1061 events. 597/1061 cut-off events. For 3820/3820 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5128 event pairs, 76 based on Foata normal form. 2/1063 useless extension candidates. Maximal degree in co-relation 4550. Up to 364 conditions per place. [2023-01-28 08:53:52,820 INFO L137 encePairwiseOnDemand]: 474/489 looper letters, 127 selfloop transitions, 84 changer transitions 4/215 dead transitions. [2023-01-28 08:53:52,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 215 transitions, 2100 flow [2023-01-28 08:53:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 08:53:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 08:53:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3911 transitions. [2023-01-28 08:53:52,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28564125036517674 [2023-01-28 08:53:52,831 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3911 transitions. [2023-01-28 08:53:52,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3911 transitions. [2023-01-28 08:53:52,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:53:52,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3911 transitions. [2023-01-28 08:53:52,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 139.67857142857142) internal successors, (3911), 28 states have internal predecessors, (3911), 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) [2023-01-28 08:53:52,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 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) [2023-01-28 08:53:52,856 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 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) [2023-01-28 08:53:52,856 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 645 flow. Second operand 28 states and 3911 transitions. [2023-01-28 08:53:52,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 215 transitions, 2100 flow [2023-01-28 08:53:52,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 215 transitions, 1914 flow, removed 66 selfloop flow, removed 5 redundant places. [2023-01-28 08:53:52,875 INFO L231 Difference]: Finished difference. Result has 116 places, 127 transitions, 1312 flow [2023-01-28 08:53:52,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1312, PETRI_PLACES=116, PETRI_TRANSITIONS=127} [2023-01-28 08:53:52,876 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 93 predicate places. [2023-01-28 08:53:52,876 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 127 transitions, 1312 flow [2023-01-28 08:53:52,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 136.90322580645162) internal successors, (4244), 31 states have internal predecessors, (4244), 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) [2023-01-28 08:53:52,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:53:52,877 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:53:52,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 08:53:53,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:53:53,083 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:53:53,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:53:53,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1380522979, now seen corresponding path program 4 times [2023-01-28 08:53:53,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:53:53,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565236566] [2023-01-28 08:53:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:53:53,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:53:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:53:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:53:53,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:53:53,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565236566] [2023-01-28 08:53:53,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565236566] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:53:53,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384480148] [2023-01-28 08:53:53,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 08:53:53,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:53:53,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:53:53,837 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) [2023-01-28 08:53:53,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 08:53:53,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 08:53:53,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:53:53,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:53:53,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:53:54,102 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:53:54,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-01-28 08:53:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:53:54,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:54:30,675 WARN L222 SmtUtils]: Spent 36.10s on a formula simplification. DAG size of input: 44 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 08:54:30,734 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:54:30,735 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 58 treesize of output 58 [2023-01-28 08:54:30,784 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-28 08:54:30,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-01-28 08:54:30,790 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 08:54:30,797 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:54:30,798 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 58 treesize of output 1 [2023-01-28 08:54:30,806 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:54:30,806 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 58 treesize of output 1 [2023-01-28 08:54:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:30,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384480148] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:54:30,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:54:30,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 26 [2023-01-28 08:54:30,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771793517] [2023-01-28 08:54:30,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:54:30,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 08:54:30,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:54:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 08:54:30,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-01-28 08:54:30,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-28 08:54:30,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 127 transitions, 1312 flow. Second operand has 27 states, 27 states have (on average 163.14814814814815) internal successors, (4405), 27 states have internal predecessors, (4405), 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) [2023-01-28 08:54:30,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:54:30,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-28 08:54:30,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:54:31,698 INFO L130 PetriNetUnfolder]: 663/1177 cut-off events. [2023-01-28 08:54:31,699 INFO L131 PetriNetUnfolder]: For 4665/4665 co-relation queries the response was YES. [2023-01-28 08:54:31,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5456 conditions, 1177 events. 663/1177 cut-off events. For 4665/4665 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5827 event pairs, 110 based on Foata normal form. 2/1159 useless extension candidates. Maximal degree in co-relation 5335. Up to 822 conditions per place. [2023-01-28 08:54:31,706 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 94 selfloop transitions, 64 changer transitions 3/161 dead transitions. [2023-01-28 08:54:31,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 161 transitions, 1844 flow [2023-01-28 08:54:31,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 08:54:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 08:54:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1997 transitions. [2023-01-28 08:54:31,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3403203817314247 [2023-01-28 08:54:31,712 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1997 transitions. [2023-01-28 08:54:31,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1997 transitions. [2023-01-28 08:54:31,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:54:31,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1997 transitions. [2023-01-28 08:54:31,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 166.41666666666666) internal successors, (1997), 12 states have internal predecessors, (1997), 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) [2023-01-28 08:54:31,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 08:54:31,724 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 08:54:31,724 INFO L175 Difference]: Start difference. First operand has 116 places, 127 transitions, 1312 flow. Second operand 12 states and 1997 transitions. [2023-01-28 08:54:31,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 161 transitions, 1844 flow [2023-01-28 08:54:31,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 161 transitions, 1712 flow, removed 13 selfloop flow, removed 12 redundant places. [2023-01-28 08:54:31,746 INFO L231 Difference]: Finished difference. Result has 119 places, 139 transitions, 1486 flow [2023-01-28 08:54:31,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1486, PETRI_PLACES=119, PETRI_TRANSITIONS=139} [2023-01-28 08:54:31,747 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 96 predicate places. [2023-01-28 08:54:31,747 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 139 transitions, 1486 flow [2023-01-28 08:54:31,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 163.14814814814815) internal successors, (4405), 27 states have internal predecessors, (4405), 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) [2023-01-28 08:54:31,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:54:31,749 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:54:31,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 08:54:31,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 08:54:31,955 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:54:31,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:54:31,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1922354213, now seen corresponding path program 5 times [2023-01-28 08:54:31,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:54:31,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954015316] [2023-01-28 08:54:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:54:31,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:54:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:54:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 08:54:33,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:54:33,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954015316] [2023-01-28 08:54:33,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954015316] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:54:33,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172071538] [2023-01-28 08:54:33,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 08:54:33,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:54:33,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:54:33,329 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) [2023-01-28 08:54:33,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 08:54:33,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 08:54:33,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:54:33,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 08:54:33,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:54:33,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:54:33,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2023-01-28 08:54:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:33,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:54:34,549 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:54:34,550 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 50 treesize of output 50 [2023-01-28 08:54:34,579 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:54:34,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-01-28 08:54:34,583 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:54:34,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-01-28 08:54:34,587 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:54:34,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-01-28 08:54:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:34,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172071538] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:54:34,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:54:34,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 8] total 29 [2023-01-28 08:54:34,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341973208] [2023-01-28 08:54:34,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:54:34,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 08:54:34,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:54:34,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 08:54:34,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2023-01-28 08:54:34,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 489 [2023-01-28 08:54:34,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 139 transitions, 1486 flow. Second operand has 30 states, 30 states have (on average 140.93333333333334) internal successors, (4228), 30 states have internal predecessors, (4228), 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) [2023-01-28 08:54:34,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:54:34,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 489 [2023-01-28 08:54:34,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:54:35,798 INFO L130 PetriNetUnfolder]: 773/1371 cut-off events. [2023-01-28 08:54:35,798 INFO L131 PetriNetUnfolder]: For 6859/6859 co-relation queries the response was YES. [2023-01-28 08:54:35,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6824 conditions, 1371 events. 773/1371 cut-off events. For 6859/6859 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7182 event pairs, 135 based on Foata normal form. 4/1355 useless extension candidates. Maximal degree in co-relation 6711. Up to 932 conditions per place. [2023-01-28 08:54:35,810 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 103 selfloop transitions, 78 changer transitions 3/184 dead transitions. [2023-01-28 08:54:35,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 184 transitions, 2145 flow [2023-01-28 08:54:35,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 08:54:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 08:54:35,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2154 transitions. [2023-01-28 08:54:35,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2936605316973415 [2023-01-28 08:54:35,814 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2154 transitions. [2023-01-28 08:54:35,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2154 transitions. [2023-01-28 08:54:35,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:54:35,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2154 transitions. [2023-01-28 08:54:35,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 143.6) internal successors, (2154), 15 states have internal predecessors, (2154), 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) [2023-01-28 08:54:35,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:54:35,827 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:54:35,827 INFO L175 Difference]: Start difference. First operand has 119 places, 139 transitions, 1486 flow. Second operand 15 states and 2154 transitions. [2023-01-28 08:54:35,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 184 transitions, 2145 flow [2023-01-28 08:54:35,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 184 transitions, 2011 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-01-28 08:54:35,856 INFO L231 Difference]: Finished difference. Result has 132 places, 155 transitions, 1780 flow [2023-01-28 08:54:35,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1780, PETRI_PLACES=132, PETRI_TRANSITIONS=155} [2023-01-28 08:54:35,857 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 109 predicate places. [2023-01-28 08:54:35,857 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 155 transitions, 1780 flow [2023-01-28 08:54:35,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 140.93333333333334) internal successors, (4228), 30 states have internal predecessors, (4228), 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) [2023-01-28 08:54:35,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:54:35,858 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:54:35,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 08:54:36,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 08:54:36,072 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:54:36,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:54:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1976346153, now seen corresponding path program 6 times [2023-01-28 08:54:36,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:54:36,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099591945] [2023-01-28 08:54:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:54:36,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:54:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:54:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:36,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:54:36,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099591945] [2023-01-28 08:54:36,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099591945] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:54:36,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389408754] [2023-01-28 08:54:36,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 08:54:36,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:54:36,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:54:36,879 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) [2023-01-28 08:54:36,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 08:54:37,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 08:54:37,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:54:37,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 08:54:37,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:54:37,140 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:54:37,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-28 08:54:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:37,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:54:37,835 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:54:37,835 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 50 treesize of output 50 [2023-01-28 08:54:37,865 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:54:37,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-01-28 08:54:37,868 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:54:37,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-01-28 08:54:37,870 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:54:37,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-01-28 08:54:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:37,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389408754] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:54:37,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:54:37,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-28 08:54:37,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309209768] [2023-01-28 08:54:37,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:54:37,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 08:54:37,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:54:37,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 08:54:37,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-01-28 08:54:37,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-28 08:54:37,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 155 transitions, 1780 flow. Second operand has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 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) [2023-01-28 08:54:37,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:54:37,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-28 08:54:37,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:54:38,975 INFO L130 PetriNetUnfolder]: 785/1401 cut-off events. [2023-01-28 08:54:38,975 INFO L131 PetriNetUnfolder]: For 8388/8388 co-relation queries the response was YES. [2023-01-28 08:54:38,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7573 conditions, 1401 events. 785/1401 cut-off events. For 8388/8388 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7407 event pairs, 138 based on Foata normal form. 2/1383 useless extension candidates. Maximal degree in co-relation 7451. Up to 1016 conditions per place. [2023-01-28 08:54:38,988 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 115 selfloop transitions, 73 changer transitions 4/192 dead transitions. [2023-01-28 08:54:38,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 192 transitions, 2402 flow [2023-01-28 08:54:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 08:54:38,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 08:54:38,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2324 transitions. [2023-01-28 08:54:38,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3394683026584867 [2023-01-28 08:54:38,992 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2324 transitions. [2023-01-28 08:54:38,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2324 transitions. [2023-01-28 08:54:38,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:54:38,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2324 transitions. [2023-01-28 08:54:38,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 166.0) internal successors, (2324), 14 states have internal predecessors, (2324), 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) [2023-01-28 08:54:39,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:54:39,004 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:54:39,004 INFO L175 Difference]: Start difference. First operand has 132 places, 155 transitions, 1780 flow. Second operand 14 states and 2324 transitions. [2023-01-28 08:54:39,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 192 transitions, 2402 flow [2023-01-28 08:54:39,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 192 transitions, 2261 flow, removed 63 selfloop flow, removed 4 redundant places. [2023-01-28 08:54:39,035 INFO L231 Difference]: Finished difference. Result has 144 places, 161 transitions, 1912 flow [2023-01-28 08:54:39,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1912, PETRI_PLACES=144, PETRI_TRANSITIONS=161} [2023-01-28 08:54:39,037 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 121 predicate places. [2023-01-28 08:54:39,037 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 161 transitions, 1912 flow [2023-01-28 08:54:39,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 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) [2023-01-28 08:54:39,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:54:39,038 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:54:39,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 08:54:39,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 08:54:39,244 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:54:39,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:54:39,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1457835971, now seen corresponding path program 7 times [2023-01-28 08:54:39,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:54:39,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901559616] [2023-01-28 08:54:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:54:39,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:54:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:54:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:40,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:54:40,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901559616] [2023-01-28 08:54:40,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901559616] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:54:40,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813425928] [2023-01-28 08:54:40,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 08:54:40,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:54:40,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:54:40,081 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:54:40,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 08:54:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:54:40,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 08:54:40,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:54:40,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:54:40,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-28 08:54:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:40,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:54:40,883 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-01-28 08:54:40,883 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 165 treesize of output 99 [2023-01-28 08:54:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:41,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813425928] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:54:41,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:54:41,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-01-28 08:54:41,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961580541] [2023-01-28 08:54:41,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:54:41,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 08:54:41,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:54:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 08:54:41,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-01-28 08:54:41,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-28 08:54:41,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 161 transitions, 1912 flow. Second operand has 24 states, 24 states have (on average 162.04166666666666) internal successors, (3889), 24 states have internal predecessors, (3889), 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) [2023-01-28 08:54:41,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:54:41,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-28 08:54:41,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:54:41,866 INFO L130 PetriNetUnfolder]: 775/1409 cut-off events. [2023-01-28 08:54:41,867 INFO L131 PetriNetUnfolder]: For 8753/8753 co-relation queries the response was YES. [2023-01-28 08:54:41,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7611 conditions, 1409 events. 775/1409 cut-off events. For 8753/8753 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7619 event pairs, 152 based on Foata normal form. 14/1403 useless extension candidates. Maximal degree in co-relation 7489. Up to 1060 conditions per place. [2023-01-28 08:54:41,877 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 104 selfloop transitions, 70 changer transitions 6/180 dead transitions. [2023-01-28 08:54:41,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 180 transitions, 2378 flow [2023-01-28 08:54:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 08:54:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 08:54:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2144 transitions. [2023-01-28 08:54:41,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33726600597766243 [2023-01-28 08:54:41,882 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2144 transitions. [2023-01-28 08:54:41,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2144 transitions. [2023-01-28 08:54:41,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:54:41,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2144 transitions. [2023-01-28 08:54:41,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 164.92307692307693) internal successors, (2144), 13 states have internal predecessors, (2144), 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) [2023-01-28 08:54:41,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 08:54:41,891 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 08:54:41,891 INFO L175 Difference]: Start difference. First operand has 144 places, 161 transitions, 1912 flow. Second operand 13 states and 2144 transitions. [2023-01-28 08:54:41,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 180 transitions, 2378 flow [2023-01-28 08:54:41,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 180 transitions, 2278 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-01-28 08:54:41,919 INFO L231 Difference]: Finished difference. Result has 150 places, 162 transitions, 1985 flow [2023-01-28 08:54:41,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1985, PETRI_PLACES=150, PETRI_TRANSITIONS=162} [2023-01-28 08:54:41,920 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 127 predicate places. [2023-01-28 08:54:41,920 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 162 transitions, 1985 flow [2023-01-28 08:54:41,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 162.04166666666666) internal successors, (3889), 24 states have internal predecessors, (3889), 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) [2023-01-28 08:54:41,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:54:41,921 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:54:41,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 08:54:42,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 08:54:42,127 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:54:42,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:54:42,128 INFO L85 PathProgramCache]: Analyzing trace with hash 2030000009, now seen corresponding path program 8 times [2023-01-28 08:54:42,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:54:42,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087012922] [2023-01-28 08:54:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:54:42,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:54:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:54:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:42,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:54:42,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087012922] [2023-01-28 08:54:42,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087012922] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:54:42,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355282194] [2023-01-28 08:54:42,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:54:42,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:54:42,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:54:42,857 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:54:42,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 08:54:43,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:54:43,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:54:43,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 08:54:43,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:54:43,138 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:54:43,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-28 08:54:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:43,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:54:43,725 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:54:43,726 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 58 treesize of output 58 [2023-01-28 08:54:43,764 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-28 08:54:43,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-01-28 08:54:43,777 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:54:43,777 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 58 treesize of output 1 [2023-01-28 08:54:43,783 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:54:43,783 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 58 treesize of output 1 [2023-01-28 08:54:43,784 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 08:54:43,791 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:54:43,791 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 58 treesize of output 1 [2023-01-28 08:54:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:43,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355282194] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:54:43,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:54:43,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-28 08:54:43,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071943003] [2023-01-28 08:54:43,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:54:43,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 08:54:43,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:54:43,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 08:54:43,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-01-28 08:54:43,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-28 08:54:43,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 162 transitions, 1985 flow. Second operand has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 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) [2023-01-28 08:54:43,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:54:43,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-28 08:54:43,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:54:44,472 INFO L130 PetriNetUnfolder]: 807/1457 cut-off events. [2023-01-28 08:54:44,472 INFO L131 PetriNetUnfolder]: For 9801/9801 co-relation queries the response was YES. [2023-01-28 08:54:44,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8273 conditions, 1457 events. 807/1457 cut-off events. For 9801/9801 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7893 event pairs, 166 based on Foata normal form. 2/1439 useless extension candidates. Maximal degree in co-relation 8149. Up to 1124 conditions per place. [2023-01-28 08:54:44,482 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 120 selfloop transitions, 65 changer transitions 2/187 dead transitions. [2023-01-28 08:54:44,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 187 transitions, 2556 flow [2023-01-28 08:54:44,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 08:54:44,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 08:54:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1990 transitions. [2023-01-28 08:54:44,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3391274710293115 [2023-01-28 08:54:44,496 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1990 transitions. [2023-01-28 08:54:44,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1990 transitions. [2023-01-28 08:54:44,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:54:44,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1990 transitions. [2023-01-28 08:54:44,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 165.83333333333334) internal successors, (1990), 12 states have internal predecessors, (1990), 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) [2023-01-28 08:54:44,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 08:54:44,504 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 08:54:44,504 INFO L175 Difference]: Start difference. First operand has 150 places, 162 transitions, 1985 flow. Second operand 12 states and 1990 transitions. [2023-01-28 08:54:44,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 187 transitions, 2556 flow [2023-01-28 08:54:44,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 187 transitions, 2405 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-01-28 08:54:44,540 INFO L231 Difference]: Finished difference. Result has 152 places, 169 transitions, 2111 flow [2023-01-28 08:54:44,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2111, PETRI_PLACES=152, PETRI_TRANSITIONS=169} [2023-01-28 08:54:44,541 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 129 predicate places. [2023-01-28 08:54:44,541 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 169 transitions, 2111 flow [2023-01-28 08:54:44,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 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) [2023-01-28 08:54:44,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:54:44,542 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:54:44,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 08:54:44,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 08:54:44,748 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:54:44,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:54:44,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1391226607, now seen corresponding path program 9 times [2023-01-28 08:54:44,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:54:44,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862797536] [2023-01-28 08:54:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:54:44,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:54:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:54:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:45,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:54:45,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862797536] [2023-01-28 08:54:45,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862797536] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:54:45,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324313721] [2023-01-28 08:54:45,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 08:54:45,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:54:45,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:54:45,354 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:54:45,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 08:54:45,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 08:54:45,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:54:45,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 08:54:45,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:54:45,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:54:45,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2023-01-28 08:54:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:45,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:54:46,206 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:54:46,207 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 58 treesize of output 58 [2023-01-28 08:54:46,241 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-28 08:54:46,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-01-28 08:54:46,250 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:54:46,251 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 58 treesize of output 1 [2023-01-28 08:54:46,259 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:54:46,259 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 58 treesize of output 1 [2023-01-28 08:54:46,260 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 08:54:46,267 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:54:46,268 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 58 treesize of output 1 [2023-01-28 08:54:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:46,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324313721] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:54:46,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:54:46,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-01-28 08:54:46,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328080950] [2023-01-28 08:54:46,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:54:46,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 08:54:46,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:54:46,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 08:54:46,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-01-28 08:54:46,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-28 08:54:46,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 169 transitions, 2111 flow. Second operand has 22 states, 22 states have (on average 163.13636363636363) internal successors, (3589), 22 states have internal predecessors, (3589), 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) [2023-01-28 08:54:46,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:54:46,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-28 08:54:46,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:54:47,148 INFO L130 PetriNetUnfolder]: 819/1487 cut-off events. [2023-01-28 08:54:47,148 INFO L131 PetriNetUnfolder]: For 11128/11128 co-relation queries the response was YES. [2023-01-28 08:54:47,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8554 conditions, 1487 events. 819/1487 cut-off events. For 11128/11128 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8161 event pairs, 172 based on Foata normal form. 2/1469 useless extension candidates. Maximal degree in co-relation 8429. Up to 1102 conditions per place. [2023-01-28 08:54:47,158 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 121 selfloop transitions, 68 changer transitions 5/194 dead transitions. [2023-01-28 08:54:47,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 194 transitions, 2650 flow [2023-01-28 08:54:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 08:54:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 08:54:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2158 transitions. [2023-01-28 08:54:47,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3394683026584867 [2023-01-28 08:54:47,162 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2158 transitions. [2023-01-28 08:54:47,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2158 transitions. [2023-01-28 08:54:47,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:54:47,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2158 transitions. [2023-01-28 08:54:47,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 166.0) internal successors, (2158), 13 states have internal predecessors, (2158), 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) [2023-01-28 08:54:47,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 08:54:47,171 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 08:54:47,171 INFO L175 Difference]: Start difference. First operand has 152 places, 169 transitions, 2111 flow. Second operand 13 states and 2158 transitions. [2023-01-28 08:54:47,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 194 transitions, 2650 flow [2023-01-28 08:54:47,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 194 transitions, 2569 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-01-28 08:54:47,205 INFO L231 Difference]: Finished difference. Result has 160 places, 170 transitions, 2214 flow [2023-01-28 08:54:47,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2214, PETRI_PLACES=160, PETRI_TRANSITIONS=170} [2023-01-28 08:54:47,206 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 137 predicate places. [2023-01-28 08:54:47,206 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 170 transitions, 2214 flow [2023-01-28 08:54:47,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 163.13636363636363) internal successors, (3589), 22 states have internal predecessors, (3589), 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) [2023-01-28 08:54:47,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:54:47,207 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:54:47,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-28 08:54:47,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 08:54:47,415 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:54:47,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:54:47,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1193323809, now seen corresponding path program 10 times [2023-01-28 08:54:47,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:54:47,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101863210] [2023-01-28 08:54:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:54:47,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:54:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:54:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:48,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:54:48,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101863210] [2023-01-28 08:54:48,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101863210] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:54:48,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841581538] [2023-01-28 08:54:48,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 08:54:48,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:54:48,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:54:48,104 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:54:48,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 08:54:48,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 08:54:48,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:54:48,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 08:54:48,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:54:48,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:54:48,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-28 08:54:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:48,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:54:48,906 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:54:48,906 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 58 treesize of output 58 [2023-01-28 08:54:48,936 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-28 08:54:48,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-01-28 08:54:48,946 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:54:48,946 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 58 treesize of output 1 [2023-01-28 08:54:48,952 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:54:48,952 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 58 treesize of output 1 [2023-01-28 08:54:48,954 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 08:54:48,961 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:54:48,961 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 58 treesize of output 1 [2023-01-28 08:54:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:48,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841581538] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:54:48,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:54:48,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-28 08:54:48,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791704674] [2023-01-28 08:54:48,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:54:48,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 08:54:48,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:54:48,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 08:54:48,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-01-28 08:54:48,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-28 08:54:49,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 170 transitions, 2214 flow. Second operand has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 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) [2023-01-28 08:54:49,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:54:49,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-28 08:54:49,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:54:49,866 INFO L130 PetriNetUnfolder]: 871/1589 cut-off events. [2023-01-28 08:54:49,866 INFO L131 PetriNetUnfolder]: For 14009/14009 co-relation queries the response was YES. [2023-01-28 08:54:49,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9591 conditions, 1589 events. 871/1589 cut-off events. For 14009/14009 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8944 event pairs, 275 based on Foata normal form. 4/1569 useless extension candidates. Maximal degree in co-relation 9463. Up to 1242 conditions per place. [2023-01-28 08:54:49,877 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 159 selfloop transitions, 46 changer transitions 5/210 dead transitions. [2023-01-28 08:54:49,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 210 transitions, 3038 flow [2023-01-28 08:54:49,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 08:54:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 08:54:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1994 transitions. [2023-01-28 08:54:49,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3398091342876619 [2023-01-28 08:54:49,880 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1994 transitions. [2023-01-28 08:54:49,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1994 transitions. [2023-01-28 08:54:49,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:54:49,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1994 transitions. [2023-01-28 08:54:49,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 166.16666666666666) internal successors, (1994), 12 states have internal predecessors, (1994), 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) [2023-01-28 08:54:49,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 08:54:49,887 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 08:54:49,888 INFO L175 Difference]: Start difference. First operand has 160 places, 170 transitions, 2214 flow. Second operand 12 states and 1994 transitions. [2023-01-28 08:54:49,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 210 transitions, 3038 flow [2023-01-28 08:54:49,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 210 transitions, 2865 flow, removed 17 selfloop flow, removed 12 redundant places. [2023-01-28 08:54:49,935 INFO L231 Difference]: Finished difference. Result has 163 places, 184 transitions, 2406 flow [2023-01-28 08:54:49,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2406, PETRI_PLACES=163, PETRI_TRANSITIONS=184} [2023-01-28 08:54:49,935 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 140 predicate places. [2023-01-28 08:54:49,936 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 184 transitions, 2406 flow [2023-01-28 08:54:49,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 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) [2023-01-28 08:54:49,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:54:49,937 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:54:49,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 08:54:50,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:54:50,141 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:54:50,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:54:50,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1163402759, now seen corresponding path program 11 times [2023-01-28 08:54:50,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:54:50,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375304210] [2023-01-28 08:54:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:54:50,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:54:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:54:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 08:54:51,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:54:51,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375304210] [2023-01-28 08:54:51,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375304210] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:54:51,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922783987] [2023-01-28 08:54:51,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 08:54:51,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:54:51,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:54:51,512 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:54:51,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 08:54:51,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 08:54:51,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:54:51,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 63 conjunts are in the unsatisfiable core [2023-01-28 08:54:51,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:54:51,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:54:51,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:54:51,995 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:54:51,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-01-28 08:54:52,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:54:52,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-28 08:54:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:52,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:54:52,515 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (< c_~result_5~0 0)) (.cse1 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (= (select (select .cse14 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse14 c_~o_0~0.base) c_~o_0~0.offset))))) (.cse0 (< 0 c_~result_5~0))) (and (or (and (or .cse0 .cse1) (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse2 (select (select .cse4 c_~o_2~0.base) c_~o_2~0.offset)) (.cse3 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse2 .cse3) (= .cse2 .cse3)))))) .cse5) (or (= c_~result_5~0 0) (and (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse7 (select (select .cse8 c_~o_2~0.base) c_~o_2~0.offset)) (.cse6 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse6 .cse7) (< .cse7 .cse6))))) (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse9 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset)))) .cse5) (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse10 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse10 c_~o_2~0.base) c_~o_2~0.offset)))) .cse0))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 5) .cse1) (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse12 (select (select .cse13 c_~o_2~0.base) c_~o_2~0.offset)) (.cse11 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse11 .cse12) (= .cse12 .cse11))))) .cse0))) is different from false [2023-01-28 08:54:52,619 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~o_2~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))) (let ((.cse2 (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse0)) (.cse6 (< .cse0 |c_thread1Thread1of1ForFork1_#t~mem1#1|)) (.cse8 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (= (select (select .cse15 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse15 c_~o_0~0.base) c_~o_0~0.offset)))))) (and (or (= .cse0 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (and (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse1 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)))) .cse2) (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse4 (select (select .cse5 c_~o_2~0.base) c_~o_2~0.offset)) (.cse3 (select (select .cse5 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse3 .cse4) (< .cse4 .cse3))))) (or .cse6 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse7 c_~o_2~0.base) c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) .cse8) (or .cse6 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse10 (select (select .cse11 c_~o_2~0.base) c_~o_2~0.offset)) (.cse9 (select (select .cse11 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse9 .cse10) (= .cse10 .cse9)))))) (or .cse2 (and (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse12 (select (select .cse14 c_~o_2~0.base) c_~o_2~0.offset)) (.cse13 (select (select .cse14 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse12 .cse13) (= .cse12 .cse13))))) (or .cse6 .cse8)))))) is different from false [2023-01-28 08:54:52,699 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-28 08:54:52,700 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 322 treesize of output 263 [2023-01-28 08:54:52,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:54:52,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 207 [2023-01-28 08:54:52,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:54:52,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 199 [2023-01-28 08:54:52,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:54:52,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 183 [2023-01-28 08:54:53,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:54:53,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:54:53,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 46 [2023-01-28 08:54:53,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:54:53,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2023-01-28 08:54:53,378 INFO L321 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2023-01-28 08:54:53,378 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 237 treesize of output 1 [2023-01-28 08:54:53,393 INFO L321 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2023-01-28 08:54:53,393 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 150 treesize of output 1 [2023-01-28 08:54:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:53,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922783987] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:54:53,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:54:53,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 38 [2023-01-28 08:54:53,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665009517] [2023-01-28 08:54:53,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:54:53,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 08:54:53,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:54:53,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 08:54:53,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1260, Unknown=2, NotChecked=146, Total=1560 [2023-01-28 08:54:53,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 489 [2023-01-28 08:54:53,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 184 transitions, 2406 flow. Second operand has 40 states, 40 states have (on average 135.6) internal successors, (5424), 40 states have internal predecessors, (5424), 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) [2023-01-28 08:54:53,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:54:53,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 489 [2023-01-28 08:54:53,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:54:56,043 INFO L130 PetriNetUnfolder]: 1013/1857 cut-off events. [2023-01-28 08:54:56,044 INFO L131 PetriNetUnfolder]: For 18945/18945 co-relation queries the response was YES. [2023-01-28 08:54:56,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11467 conditions, 1857 events. 1013/1857 cut-off events. For 18945/18945 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 10909 event pairs, 116 based on Foata normal form. 12/1869 useless extension candidates. Maximal degree in co-relation 11337. Up to 508 conditions per place. [2023-01-28 08:54:56,053 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 125 selfloop transitions, 115 changer transitions 18/258 dead transitions. [2023-01-28 08:54:56,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 258 transitions, 3628 flow [2023-01-28 08:54:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-28 08:54:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-28 08:54:56,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3448 transitions. [2023-01-28 08:54:56,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2820449897750511 [2023-01-28 08:54:56,057 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3448 transitions. [2023-01-28 08:54:56,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3448 transitions. [2023-01-28 08:54:56,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:54:56,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3448 transitions. [2023-01-28 08:54:56,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 137.92) internal successors, (3448), 25 states have internal predecessors, (3448), 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) [2023-01-28 08:54:56,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 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) [2023-01-28 08:54:56,070 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 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) [2023-01-28 08:54:56,070 INFO L175 Difference]: Start difference. First operand has 163 places, 184 transitions, 2406 flow. Second operand 25 states and 3448 transitions. [2023-01-28 08:54:56,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 258 transitions, 3628 flow [2023-01-28 08:54:56,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 258 transitions, 3520 flow, removed 46 selfloop flow, removed 4 redundant places. [2023-01-28 08:54:56,117 INFO L231 Difference]: Finished difference. Result has 190 places, 194 transitions, 2849 flow [2023-01-28 08:54:56,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2849, PETRI_PLACES=190, PETRI_TRANSITIONS=194} [2023-01-28 08:54:56,118 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 167 predicate places. [2023-01-28 08:54:56,118 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 194 transitions, 2849 flow [2023-01-28 08:54:56,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 135.6) internal successors, (5424), 40 states have internal predecessors, (5424), 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) [2023-01-28 08:54:56,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:54:56,119 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:54:56,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 08:54:56,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:54:56,325 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:54:56,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:54:56,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2033547511, now seen corresponding path program 12 times [2023-01-28 08:54:56,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:54:56,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581319669] [2023-01-28 08:54:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:54:56,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:54:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:54:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:57,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:54:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581319669] [2023-01-28 08:54:57,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581319669] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:54:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240855842] [2023-01-28 08:54:57,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 08:54:57,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:54:57,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:54:57,022 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:54:57,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 08:54:57,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 08:54:57,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:54:57,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 08:54:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:54:57,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:54:57,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-28 08:54:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:57,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:54:57,682 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-01-28 08:54:57,682 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 185 treesize of output 103 [2023-01-28 08:54:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:57,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240855842] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:54:57,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:54:57,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-01-28 08:54:57,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203300950] [2023-01-28 08:54:57,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:54:57,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 08:54:57,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:54:57,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 08:54:57,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-01-28 08:54:57,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-28 08:54:57,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 194 transitions, 2849 flow. Second operand has 24 states, 24 states have (on average 162.04166666666666) internal successors, (3889), 24 states have internal predecessors, (3889), 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) [2023-01-28 08:54:57,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:54:57,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-28 08:54:57,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:54:58,599 INFO L130 PetriNetUnfolder]: 1051/1915 cut-off events. [2023-01-28 08:54:58,599 INFO L131 PetriNetUnfolder]: For 25632/25632 co-relation queries the response was YES. [2023-01-28 08:54:58,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12966 conditions, 1915 events. 1051/1915 cut-off events. For 25632/25632 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 11235 event pairs, 352 based on Foata normal form. 6/1921 useless extension candidates. Maximal degree in co-relation 12818. Up to 1562 conditions per place. [2023-01-28 08:54:58,611 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 174 selfloop transitions, 53 changer transitions 11/238 dead transitions. [2023-01-28 08:54:58,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 238 transitions, 3893 flow [2023-01-28 08:54:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 08:54:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 08:54:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2307 transitions. [2023-01-28 08:54:58,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33698510078878174 [2023-01-28 08:54:58,623 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2307 transitions. [2023-01-28 08:54:58,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2307 transitions. [2023-01-28 08:54:58,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:54:58,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2307 transitions. [2023-01-28 08:54:58,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 164.78571428571428) internal successors, (2307), 14 states have internal predecessors, (2307), 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) [2023-01-28 08:54:58,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:54:58,631 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:54:58,631 INFO L175 Difference]: Start difference. First operand has 190 places, 194 transitions, 2849 flow. Second operand 14 states and 2307 transitions. [2023-01-28 08:54:58,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 238 transitions, 3893 flow [2023-01-28 08:54:58,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 238 transitions, 3693 flow, removed 40 selfloop flow, removed 16 redundant places. [2023-01-28 08:54:58,703 INFO L231 Difference]: Finished difference. Result has 191 places, 207 transitions, 3098 flow [2023-01-28 08:54:58,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3098, PETRI_PLACES=191, PETRI_TRANSITIONS=207} [2023-01-28 08:54:58,704 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 168 predicate places. [2023-01-28 08:54:58,704 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 207 transitions, 3098 flow [2023-01-28 08:54:58,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 162.04166666666666) internal successors, (3889), 24 states have internal predecessors, (3889), 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) [2023-01-28 08:54:58,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:54:58,705 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:54:58,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 08:54:58,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:54:58,913 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:54:58,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:54:58,914 INFO L85 PathProgramCache]: Analyzing trace with hash 2027142943, now seen corresponding path program 13 times [2023-01-28 08:54:58,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:54:58,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888158581] [2023-01-28 08:54:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:54:58,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:54:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:54:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:54:59,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:54:59,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888158581] [2023-01-28 08:54:59,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888158581] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:54:59,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087088736] [2023-01-28 08:54:59,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 08:54:59,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:54:59,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:54:59,641 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:54:59,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 08:54:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:54:59,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 60 conjunts are in the unsatisfiable core [2023-01-28 08:54:59,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:54:59,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:54:59,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 08:55:00,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:00,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-28 08:55:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:00,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:00,727 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (and (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (let ((.cse2 (select .cse0 .cse3))) (or (< (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse2) (= .cse2 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse6 (select .cse7 ~o_2~0.base))) (let ((.cse4 (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset)) (.cse5 (select .cse6 c_~o_2~0.offset))) (or (< .cse4 .cse5) (< (select .cse6 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse4 .cse5)))))) (or (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (= (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse8 ~o_2~0.base) c_~o_2~0.offset)))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse11 (select .cse12 ~o_2~0.base))) (let ((.cse10 (select (select .cse12 c_~o_0~0.base) c_~o_0~0.offset)) (.cse9 (select .cse11 c_~o_2~0.offset))) (or (< .cse9 .cse10) (= .cse10 .cse9) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse11 .cse3))))))) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse14 (select .cse13 ~o_2~0.base))) (let ((.cse15 (select .cse14 .cse3))) (or (< (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset) (select .cse14 c_~o_2~0.offset)) (< .cse15 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse15 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))))) is different from false [2023-01-28 08:55:00,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:00,771 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 156 treesize of output 160 [2023-01-28 08:55:00,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:00,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 84 [2023-01-28 08:55:01,208 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 08:55:01,211 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:55:01,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-01-28 08:55:01,214 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 08:55:01,217 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:55:01,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-01-28 08:55:01,220 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 08:55:01,223 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:55:01,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-01-28 08:55:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:01,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087088736] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:01,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:01,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-01-28 08:55:01,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664021967] [2023-01-28 08:55:01,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:01,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 08:55:01,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:01,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 08:55:01,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=816, Unknown=1, NotChecked=58, Total=992 [2023-01-28 08:55:01,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 489 [2023-01-28 08:55:01,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 207 transitions, 3098 flow. Second operand has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 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) [2023-01-28 08:55:01,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:01,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 489 [2023-01-28 08:55:01,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:05,581 INFO L130 PetriNetUnfolder]: 1127/2039 cut-off events. [2023-01-28 08:55:05,581 INFO L131 PetriNetUnfolder]: For 29082/29082 co-relation queries the response was YES. [2023-01-28 08:55:05,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14543 conditions, 2039 events. 1127/2039 cut-off events. For 29082/29082 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 11969 event pairs, 241 based on Foata normal form. 2/2041 useless extension candidates. Maximal degree in co-relation 14410. Up to 1568 conditions per place. [2023-01-28 08:55:05,599 INFO L137 encePairwiseOnDemand]: 475/489 looper letters, 139 selfloop transitions, 121 changer transitions 3/263 dead transitions. [2023-01-28 08:55:05,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 263 transitions, 4420 flow [2023-01-28 08:55:05,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 08:55:05,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 08:55:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2264 transitions. [2023-01-28 08:55:05,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307040607654105 [2023-01-28 08:55:05,602 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2264 transitions. [2023-01-28 08:55:05,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2264 transitions. [2023-01-28 08:55:05,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:05,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2264 transitions. [2023-01-28 08:55:05,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.71428571428572) internal successors, (2264), 14 states have internal predecessors, (2264), 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) [2023-01-28 08:55:05,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:55:05,610 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:55:05,610 INFO L175 Difference]: Start difference. First operand has 191 places, 207 transitions, 3098 flow. Second operand 14 states and 2264 transitions. [2023-01-28 08:55:05,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 263 transitions, 4420 flow [2023-01-28 08:55:05,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 263 transitions, 4197 flow, removed 84 selfloop flow, removed 8 redundant places. [2023-01-28 08:55:05,707 INFO L231 Difference]: Finished difference. Result has 198 places, 241 transitions, 3899 flow [2023-01-28 08:55:05,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2925, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3899, PETRI_PLACES=198, PETRI_TRANSITIONS=241} [2023-01-28 08:55:05,707 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 175 predicate places. [2023-01-28 08:55:05,707 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 241 transitions, 3899 flow [2023-01-28 08:55:05,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 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) [2023-01-28 08:55:05,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:05,708 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:05,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:05,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:05,915 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:05,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:05,915 INFO L85 PathProgramCache]: Analyzing trace with hash -797449613, now seen corresponding path program 14 times [2023-01-28 08:55:05,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:05,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996758941] [2023-01-28 08:55:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:05,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:06,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:06,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996758941] [2023-01-28 08:55:06,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996758941] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:06,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683775406] [2023-01-28 08:55:06,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:55:06,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:06,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:06,493 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:06,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 08:55:06,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:55:06,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:06,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 08:55:06,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:06,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:06,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-28 08:55:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:06,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:07,138 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:55:07,138 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 110 treesize of output 71 [2023-01-28 08:55:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:07,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683775406] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:07,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:07,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-01-28 08:55:07,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119379236] [2023-01-28 08:55:07,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:07,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 08:55:07,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:07,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 08:55:07,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2023-01-28 08:55:07,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-28 08:55:07,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 241 transitions, 3899 flow. Second operand has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 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) [2023-01-28 08:55:07,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:07,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-28 08:55:07,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:08,419 INFO L130 PetriNetUnfolder]: 1313/2381 cut-off events. [2023-01-28 08:55:08,419 INFO L131 PetriNetUnfolder]: For 34957/34957 co-relation queries the response was YES. [2023-01-28 08:55:08,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17828 conditions, 2381 events. 1313/2381 cut-off events. For 34957/34957 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 14636 event pairs, 139 based on Foata normal form. 2/2383 useless extension candidates. Maximal degree in co-relation 17692. Up to 866 conditions per place. [2023-01-28 08:55:08,436 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 202 selfloop transitions, 120 changer transitions 10/332 dead transitions. [2023-01-28 08:55:08,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 332 transitions, 5886 flow [2023-01-28 08:55:08,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 08:55:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 08:55:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2495 transitions. [2023-01-28 08:55:08,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3401499659168371 [2023-01-28 08:55:08,443 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2495 transitions. [2023-01-28 08:55:08,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2495 transitions. [2023-01-28 08:55:08,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:08,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2495 transitions. [2023-01-28 08:55:08,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.33333333333334) internal successors, (2495), 15 states have internal predecessors, (2495), 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) [2023-01-28 08:55:08,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:55:08,451 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:55:08,451 INFO L175 Difference]: Start difference. First operand has 198 places, 241 transitions, 3899 flow. Second operand 15 states and 2495 transitions. [2023-01-28 08:55:08,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 332 transitions, 5886 flow [2023-01-28 08:55:08,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 332 transitions, 5629 flow, removed 30 selfloop flow, removed 10 redundant places. [2023-01-28 08:55:08,571 INFO L231 Difference]: Finished difference. Result has 205 places, 271 transitions, 4664 flow [2023-01-28 08:55:08,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=3678, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4664, PETRI_PLACES=205, PETRI_TRANSITIONS=271} [2023-01-28 08:55:08,572 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 182 predicate places. [2023-01-28 08:55:08,572 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 271 transitions, 4664 flow [2023-01-28 08:55:08,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 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) [2023-01-28 08:55:08,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:08,573 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:08,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:08,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:08,779 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:08,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:08,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1548093533, now seen corresponding path program 15 times [2023-01-28 08:55:08,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:08,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467689436] [2023-01-28 08:55:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:08,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:09,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:09,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467689436] [2023-01-28 08:55:09,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467689436] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:09,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153330727] [2023-01-28 08:55:09,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 08:55:09,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:09,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:09,533 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:09,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 08:55:09,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 08:55:09,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:09,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-28 08:55:09,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:09,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:55:09,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 08:55:09,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:09,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-28 08:55:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:09,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:10,657 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (and (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse2 (select .cse4 ~o_2~0.base))) (let ((.cse0 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset)) (.cse1 (select .cse2 c_~o_2~0.offset))) (or (< .cse0 .cse1) (< (select .cse2 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse0 .cse1)))))) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse5 (select .cse6 ~o_2~0.base))) (let ((.cse7 (select .cse5 .cse3))) (or (< (select .cse5 c_~o_2~0.offset) (select (select .cse6 c_~o_0~0.base) c_~o_0~0.offset)) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse7) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse7)))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (= (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse8 ~o_2~0.base) c_~o_2~0.offset))))) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse11 (select .cse12 ~o_2~0.base))) (let ((.cse10 (select (select .cse12 c_~o_0~0.base) c_~o_0~0.offset)) (.cse9 (select .cse11 c_~o_2~0.offset))) (or (< .cse9 .cse10) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse11 .cse3)) (= .cse10 .cse9)))))) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse14 (select .cse13 ~o_2~0.base))) (let ((.cse15 (select .cse14 .cse3))) (or (< (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset) (select .cse14 c_~o_2~0.offset)) (< .cse15 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse15)))))))) is different from false [2023-01-28 08:55:10,681 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-28 08:55:10,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 57 [2023-01-28 08:55:10,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:10,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-01-28 08:55:10,778 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-28 08:55:10,778 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 176 treesize of output 173 [2023-01-28 08:55:10,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:10,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 118 [2023-01-28 08:55:11,310 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 08:55:11,313 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:55:11,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-01-28 08:55:11,315 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 08:55:11,317 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:55:11,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-01-28 08:55:11,319 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 08:55:11,322 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:55:11,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-01-28 08:55:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:11,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153330727] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:11,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:11,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-01-28 08:55:11,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714603777] [2023-01-28 08:55:11,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:11,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 08:55:11,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 08:55:11,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=816, Unknown=1, NotChecked=58, Total=992 [2023-01-28 08:55:11,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 489 [2023-01-28 08:55:11,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 271 transitions, 4664 flow. Second operand has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 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) [2023-01-28 08:55:11,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:11,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 489 [2023-01-28 08:55:11,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:14,664 INFO L130 PetriNetUnfolder]: 1313/2379 cut-off events. [2023-01-28 08:55:14,664 INFO L131 PetriNetUnfolder]: For 36515/36515 co-relation queries the response was YES. [2023-01-28 08:55:14,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18690 conditions, 2379 events. 1313/2379 cut-off events. For 36515/36515 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 14441 event pairs, 291 based on Foata normal form. 2/2381 useless extension candidates. Maximal degree in co-relation 18554. Up to 1762 conditions per place. [2023-01-28 08:55:14,677 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 167 selfloop transitions, 129 changer transitions 5/301 dead transitions. [2023-01-28 08:55:14,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 301 transitions, 5521 flow [2023-01-28 08:55:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 08:55:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 08:55:14,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2265 transitions. [2023-01-28 08:55:14,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3308501314636284 [2023-01-28 08:55:14,680 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2265 transitions. [2023-01-28 08:55:14,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2265 transitions. [2023-01-28 08:55:14,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:14,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2265 transitions. [2023-01-28 08:55:14,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.78571428571428) internal successors, (2265), 14 states have internal predecessors, (2265), 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) [2023-01-28 08:55:14,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:55:14,686 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:55:14,686 INFO L175 Difference]: Start difference. First operand has 205 places, 271 transitions, 4664 flow. Second operand 14 states and 2265 transitions. [2023-01-28 08:55:14,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 301 transitions, 5521 flow [2023-01-28 08:55:14,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 301 transitions, 4984 flow, removed 183 selfloop flow, removed 13 redundant places. [2023-01-28 08:55:14,790 INFO L231 Difference]: Finished difference. Result has 206 places, 272 transitions, 4454 flow [2023-01-28 08:55:14,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4143, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4454, PETRI_PLACES=206, PETRI_TRANSITIONS=272} [2023-01-28 08:55:14,790 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 183 predicate places. [2023-01-28 08:55:14,790 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 272 transitions, 4454 flow [2023-01-28 08:55:14,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 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) [2023-01-28 08:55:14,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:14,791 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:14,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:14,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:14,992 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:14,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:14,992 INFO L85 PathProgramCache]: Analyzing trace with hash -308879501, now seen corresponding path program 16 times [2023-01-28 08:55:14,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:14,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959775034] [2023-01-28 08:55:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:14,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:15,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:15,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959775034] [2023-01-28 08:55:15,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959775034] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:15,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146052026] [2023-01-28 08:55:15,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 08:55:15,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:15,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:15,554 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:15,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 08:55:15,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 08:55:15,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:15,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 08:55:15,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:15,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:15,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-28 08:55:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:15,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:16,303 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:55:16,304 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 58 treesize of output 58 [2023-01-28 08:55:16,331 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-28 08:55:16,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-01-28 08:55:16,339 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:55:16,339 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 58 treesize of output 1 [2023-01-28 08:55:16,344 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:55:16,344 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 58 treesize of output 1 [2023-01-28 08:55:16,346 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 08:55:16,352 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:55:16,352 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 58 treesize of output 1 [2023-01-28 08:55:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:16,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146052026] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:16,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:16,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-28 08:55:16,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165952801] [2023-01-28 08:55:16,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:16,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 08:55:16,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:16,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 08:55:16,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-01-28 08:55:16,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-28 08:55:16,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 272 transitions, 4454 flow. Second operand has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 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) [2023-01-28 08:55:16,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:16,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-28 08:55:16,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:17,213 INFO L130 PetriNetUnfolder]: 1329/2421 cut-off events. [2023-01-28 08:55:17,213 INFO L131 PetriNetUnfolder]: For 32125/32125 co-relation queries the response was YES. [2023-01-28 08:55:17,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17786 conditions, 2421 events. 1329/2421 cut-off events. For 32125/32125 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 14846 event pairs, 437 based on Foata normal form. 2/2423 useless extension candidates. Maximal degree in co-relation 17654. Up to 2078 conditions per place. [2023-01-28 08:55:17,230 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 251 selfloop transitions, 55 changer transitions 2/308 dead transitions. [2023-01-28 08:55:17,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 308 transitions, 5480 flow [2023-01-28 08:55:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 08:55:17,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 08:55:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2156 transitions. [2023-01-28 08:55:17,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33915368884694036 [2023-01-28 08:55:17,232 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2156 transitions. [2023-01-28 08:55:17,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2156 transitions. [2023-01-28 08:55:17,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:17,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2156 transitions. [2023-01-28 08:55:17,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 165.84615384615384) internal successors, (2156), 13 states have internal predecessors, (2156), 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) [2023-01-28 08:55:17,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 08:55:17,240 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 08:55:17,240 INFO L175 Difference]: Start difference. First operand has 206 places, 272 transitions, 4454 flow. Second operand 13 states and 2156 transitions. [2023-01-28 08:55:17,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 308 transitions, 5480 flow [2023-01-28 08:55:17,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 308 transitions, 5184 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-01-28 08:55:17,344 INFO L231 Difference]: Finished difference. Result has 208 places, 282 transitions, 4533 flow [2023-01-28 08:55:17,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4158, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4533, PETRI_PLACES=208, PETRI_TRANSITIONS=282} [2023-01-28 08:55:17,345 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 185 predicate places. [2023-01-28 08:55:17,345 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 282 transitions, 4533 flow [2023-01-28 08:55:17,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 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) [2023-01-28 08:55:17,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:17,346 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:17,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-01-28 08:55:17,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-01-28 08:55:17,546 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:17,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:17,546 INFO L85 PathProgramCache]: Analyzing trace with hash 702796357, now seen corresponding path program 17 times [2023-01-28 08:55:17,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:17,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443445175] [2023-01-28 08:55:17,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:17,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:18,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:18,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443445175] [2023-01-28 08:55:18,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443445175] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:18,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428194187] [2023-01-28 08:55:18,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 08:55:18,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:18,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:18,110 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:18,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 08:55:18,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 08:55:18,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:18,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 08:55:18,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:18,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:18,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-01-28 08:55:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:18,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:18,779 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-01-28 08:55:18,779 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 165 treesize of output 99 [2023-01-28 08:55:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:18,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428194187] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:18,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:18,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-01-28 08:55:18,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117021697] [2023-01-28 08:55:18,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:18,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 08:55:18,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:18,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 08:55:18,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-01-28 08:55:18,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-28 08:55:18,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 282 transitions, 4533 flow. Second operand has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 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) [2023-01-28 08:55:18,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:18,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-28 08:55:18,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:19,820 INFO L130 PetriNetUnfolder]: 1327/2429 cut-off events. [2023-01-28 08:55:19,821 INFO L131 PetriNetUnfolder]: For 33258/33258 co-relation queries the response was YES. [2023-01-28 08:55:19,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17867 conditions, 2429 events. 1327/2429 cut-off events. For 33258/33258 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15040 event pairs, 443 based on Foata normal form. 2/2431 useless extension candidates. Maximal degree in co-relation 17734. Up to 2056 conditions per place. [2023-01-28 08:55:19,838 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 238 selfloop transitions, 68 changer transitions 2/308 dead transitions. [2023-01-28 08:55:19,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 308 transitions, 5378 flow [2023-01-28 08:55:19,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 08:55:19,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 08:55:19,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2153 transitions. [2023-01-28 08:55:19,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33868176812962086 [2023-01-28 08:55:19,841 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2153 transitions. [2023-01-28 08:55:19,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2153 transitions. [2023-01-28 08:55:19,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:19,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2153 transitions. [2023-01-28 08:55:19,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 165.6153846153846) internal successors, (2153), 13 states have internal predecessors, (2153), 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) [2023-01-28 08:55:19,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 08:55:19,846 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 08:55:19,846 INFO L175 Difference]: Start difference. First operand has 208 places, 282 transitions, 4533 flow. Second operand 13 states and 2153 transitions. [2023-01-28 08:55:19,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 308 transitions, 5378 flow [2023-01-28 08:55:19,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 308 transitions, 5203 flow, removed 57 selfloop flow, removed 7 redundant places. [2023-01-28 08:55:19,930 INFO L231 Difference]: Finished difference. Result has 215 places, 286 transitions, 4598 flow [2023-01-28 08:55:19,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4598, PETRI_PLACES=215, PETRI_TRANSITIONS=286} [2023-01-28 08:55:19,930 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 192 predicate places. [2023-01-28 08:55:19,930 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 286 transitions, 4598 flow [2023-01-28 08:55:19,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 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) [2023-01-28 08:55:19,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:19,931 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:19,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:20,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 08:55:20,131 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:20,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:20,132 INFO L85 PathProgramCache]: Analyzing trace with hash -347288759, now seen corresponding path program 18 times [2023-01-28 08:55:20,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:20,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047046353] [2023-01-28 08:55:20,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:20,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:20,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:20,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047046353] [2023-01-28 08:55:20,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047046353] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:20,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662090001] [2023-01-28 08:55:20,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 08:55:20,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:20,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:20,793 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:20,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 08:55:20,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 08:55:20,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:21,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 08:55:21,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:21,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:21,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-01-28 08:55:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:21,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:21,582 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:55:21,582 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 58 treesize of output 58 [2023-01-28 08:55:21,611 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-28 08:55:21,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-01-28 08:55:21,619 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:55:21,619 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 58 treesize of output 1 [2023-01-28 08:55:21,625 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:55:21,625 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 58 treesize of output 1 [2023-01-28 08:55:21,626 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 08:55:21,634 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-01-28 08:55:21,635 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 58 treesize of output 1 [2023-01-28 08:55:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:21,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662090001] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:21,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:21,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-28 08:55:21,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287076773] [2023-01-28 08:55:21,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:21,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 08:55:21,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:21,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 08:55:21,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-01-28 08:55:21,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 489 [2023-01-28 08:55:21,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 286 transitions, 4598 flow. Second operand has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 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) [2023-01-28 08:55:21,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:21,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 489 [2023-01-28 08:55:21,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:22,594 INFO L130 PetriNetUnfolder]: 1327/2427 cut-off events. [2023-01-28 08:55:22,594 INFO L131 PetriNetUnfolder]: For 32348/32348 co-relation queries the response was YES. [2023-01-28 08:55:22,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17875 conditions, 2427 events. 1327/2427 cut-off events. For 32348/32348 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15017 event pairs, 435 based on Foata normal form. 2/2429 useless extension candidates. Maximal degree in co-relation 17740. Up to 2054 conditions per place. [2023-01-28 08:55:22,610 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 257 selfloop transitions, 56 changer transitions 3/316 dead transitions. [2023-01-28 08:55:22,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 316 transitions, 5472 flow [2023-01-28 08:55:22,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 08:55:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 08:55:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1995 transitions. [2023-01-28 08:55:22,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3399795501022495 [2023-01-28 08:55:22,613 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1995 transitions. [2023-01-28 08:55:22,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1995 transitions. [2023-01-28 08:55:22,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:22,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1995 transitions. [2023-01-28 08:55:22,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 166.25) internal successors, (1995), 12 states have internal predecessors, (1995), 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) [2023-01-28 08:55:22,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 08:55:22,619 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 08:55:22,619 INFO L175 Difference]: Start difference. First operand has 215 places, 286 transitions, 4598 flow. Second operand 12 states and 1995 transitions. [2023-01-28 08:55:22,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 316 transitions, 5472 flow [2023-01-28 08:55:22,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 316 transitions, 5304 flow, removed 22 selfloop flow, removed 10 redundant places. [2023-01-28 08:55:22,726 INFO L231 Difference]: Finished difference. Result has 217 places, 288 transitions, 4611 flow [2023-01-28 08:55:22,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4430, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4611, PETRI_PLACES=217, PETRI_TRANSITIONS=288} [2023-01-28 08:55:22,726 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 194 predicate places. [2023-01-28 08:55:22,726 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 288 transitions, 4611 flow [2023-01-28 08:55:22,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.08695652173913) internal successors, (3751), 23 states have internal predecessors, (3751), 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) [2023-01-28 08:55:22,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:22,727 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:22,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:22,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 08:55:22,927 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:22,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:22,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1754254317, now seen corresponding path program 19 times [2023-01-28 08:55:22,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:22,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884752615] [2023-01-28 08:55:22,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:22,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:23,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:23,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884752615] [2023-01-28 08:55:23,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884752615] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:23,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881921529] [2023-01-28 08:55:23,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 08:55:23,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:23,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:23,639 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:23,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 08:55:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:23,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:55:23,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:23,972 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:23,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 08:55:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:24,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:24,226 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:55:24,227 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 32 treesize of output 48 [2023-01-28 08:55:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:24,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881921529] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:24,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:24,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 08:55:24,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027600609] [2023-01-28 08:55:24,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:24,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 08:55:24,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:24,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 08:55:24,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-01-28 08:55:24,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:55:24,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 288 transitions, 4611 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 08:55:24,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:24,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:55:24,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:25,276 INFO L130 PetriNetUnfolder]: 1389/2543 cut-off events. [2023-01-28 08:55:25,276 INFO L131 PetriNetUnfolder]: For 35040/35040 co-relation queries the response was YES. [2023-01-28 08:55:25,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18640 conditions, 2543 events. 1389/2543 cut-off events. For 35040/35040 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 15996 event pairs, 249 based on Foata normal form. 8/2551 useless extension candidates. Maximal degree in co-relation 18504. Up to 781 conditions per place. [2023-01-28 08:55:25,293 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 252 selfloop transitions, 145 changer transitions 3/400 dead transitions. [2023-01-28 08:55:25,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 400 transitions, 6788 flow [2023-01-28 08:55:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 08:55:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 08:55:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2543 transitions. [2023-01-28 08:55:25,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3466939331970007 [2023-01-28 08:55:25,295 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2543 transitions. [2023-01-28 08:55:25,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2543 transitions. [2023-01-28 08:55:25,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:25,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2543 transitions. [2023-01-28 08:55:25,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 169.53333333333333) internal successors, (2543), 15 states have internal predecessors, (2543), 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) [2023-01-28 08:55:25,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:55:25,301 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:55:25,301 INFO L175 Difference]: Start difference. First operand has 217 places, 288 transitions, 4611 flow. Second operand 15 states and 2543 transitions. [2023-01-28 08:55:25,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 400 transitions, 6788 flow [2023-01-28 08:55:25,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 400 transitions, 6623 flow, removed 14 selfloop flow, removed 10 redundant places. [2023-01-28 08:55:25,395 INFO L231 Difference]: Finished difference. Result has 224 places, 301 transitions, 4950 flow [2023-01-28 08:55:25,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4474, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4950, PETRI_PLACES=224, PETRI_TRANSITIONS=301} [2023-01-28 08:55:25,395 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 201 predicate places. [2023-01-28 08:55:25,395 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 301 transitions, 4950 flow [2023-01-28 08:55:25,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 08:55:25,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:25,396 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:25,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:25,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:25,597 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:25,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:25,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1070556359, now seen corresponding path program 20 times [2023-01-28 08:55:25,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:25,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853072589] [2023-01-28 08:55:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:25,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:26,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:26,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853072589] [2023-01-28 08:55:26,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853072589] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:26,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22494215] [2023-01-28 08:55:26,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:55:26,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:26,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:26,361 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:26,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 08:55:26,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:55:26,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:26,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 08:55:26,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:26,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:26,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-01-28 08:55:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:26,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:26,919 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:55:26,919 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 32 treesize of output 48 [2023-01-28 08:55:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:26,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22494215] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:26,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:26,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-01-28 08:55:26,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935487991] [2023-01-28 08:55:26,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:26,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 08:55:26,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:26,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 08:55:26,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-01-28 08:55:26,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:55:26,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 301 transitions, 4950 flow. Second operand has 21 states, 21 states have (on average 165.1904761904762) internal successors, (3469), 21 states have internal predecessors, (3469), 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) [2023-01-28 08:55:26,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:26,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:55:26,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:28,814 INFO L130 PetriNetUnfolder]: 1481/2691 cut-off events. [2023-01-28 08:55:28,814 INFO L131 PetriNetUnfolder]: For 38043/38043 co-relation queries the response was YES. [2023-01-28 08:55:28,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20348 conditions, 2691 events. 1481/2691 cut-off events. For 38043/38043 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 17016 event pairs, 255 based on Foata normal form. 8/2699 useless extension candidates. Maximal degree in co-relation 20210. Up to 931 conditions per place. [2023-01-28 08:55:28,834 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 231 selfloop transitions, 184 changer transitions 8/423 dead transitions. [2023-01-28 08:55:28,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 423 transitions, 7380 flow [2023-01-28 08:55:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 08:55:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 08:55:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3698 transitions. [2023-01-28 08:55:28,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34374419036995724 [2023-01-28 08:55:28,840 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3698 transitions. [2023-01-28 08:55:28,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3698 transitions. [2023-01-28 08:55:28,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:28,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3698 transitions. [2023-01-28 08:55:28,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 168.0909090909091) internal successors, (3698), 22 states have internal predecessors, (3698), 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) [2023-01-28 08:55:28,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 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) [2023-01-28 08:55:28,850 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 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) [2023-01-28 08:55:28,850 INFO L175 Difference]: Start difference. First operand has 224 places, 301 transitions, 4950 flow. Second operand 22 states and 3698 transitions. [2023-01-28 08:55:28,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 423 transitions, 7380 flow [2023-01-28 08:55:28,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 423 transitions, 7157 flow, removed 35 selfloop flow, removed 5 redundant places. [2023-01-28 08:55:28,963 INFO L231 Difference]: Finished difference. Result has 244 places, 338 transitions, 5752 flow [2023-01-28 08:55:28,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5752, PETRI_PLACES=244, PETRI_TRANSITIONS=338} [2023-01-28 08:55:28,963 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 221 predicate places. [2023-01-28 08:55:28,963 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 338 transitions, 5752 flow [2023-01-28 08:55:28,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.1904761904762) internal successors, (3469), 21 states have internal predecessors, (3469), 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) [2023-01-28 08:55:28,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:28,964 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:28,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:29,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 08:55:29,169 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:29,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:29,169 INFO L85 PathProgramCache]: Analyzing trace with hash -685105157, now seen corresponding path program 21 times [2023-01-28 08:55:29,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:29,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154406760] [2023-01-28 08:55:29,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:29,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:29,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:29,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154406760] [2023-01-28 08:55:29,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154406760] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:29,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513352711] [2023-01-28 08:55:29,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 08:55:29,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:29,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:29,737 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:29,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 08:55:29,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 08:55:29,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:29,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:55:29,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:30,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:30,195 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-28 08:55:30,196 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 82 treesize of output 99 [2023-01-28 08:55:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:30,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513352711] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:30,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:30,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-01-28 08:55:30,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422015076] [2023-01-28 08:55:30,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:30,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 08:55:30,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:30,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 08:55:30,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-01-28 08:55:30,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:55:30,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 338 transitions, 5752 flow. Second operand has 18 states, 18 states have (on average 165.22222222222223) internal successors, (2974), 18 states have internal predecessors, (2974), 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) [2023-01-28 08:55:30,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:30,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:55:30,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:31,128 INFO L130 PetriNetUnfolder]: 1505/2721 cut-off events. [2023-01-28 08:55:31,129 INFO L131 PetriNetUnfolder]: For 41487/41487 co-relation queries the response was YES. [2023-01-28 08:55:31,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21284 conditions, 2721 events. 1505/2721 cut-off events. For 41487/41487 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 17211 event pairs, 361 based on Foata normal form. 8/2729 useless extension candidates. Maximal degree in co-relation 21142. Up to 1659 conditions per place. [2023-01-28 08:55:31,145 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 239 selfloop transitions, 175 changer transitions 2/416 dead transitions. [2023-01-28 08:55:31,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 416 transitions, 7590 flow [2023-01-28 08:55:31,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 08:55:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 08:55:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2354 transitions. [2023-01-28 08:55:31,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3438504236050248 [2023-01-28 08:55:31,148 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2354 transitions. [2023-01-28 08:55:31,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2354 transitions. [2023-01-28 08:55:31,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:31,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2354 transitions. [2023-01-28 08:55:31,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 168.14285714285714) internal successors, (2354), 14 states have internal predecessors, (2354), 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) [2023-01-28 08:55:31,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:55:31,154 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:55:31,154 INFO L175 Difference]: Start difference. First operand has 244 places, 338 transitions, 5752 flow. Second operand 14 states and 2354 transitions. [2023-01-28 08:55:31,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 416 transitions, 7590 flow [2023-01-28 08:55:31,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 416 transitions, 7399 flow, removed 55 selfloop flow, removed 6 redundant places. [2023-01-28 08:55:31,306 INFO L231 Difference]: Finished difference. Result has 251 places, 344 transitions, 6180 flow [2023-01-28 08:55:31,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=5563, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6180, PETRI_PLACES=251, PETRI_TRANSITIONS=344} [2023-01-28 08:55:31,307 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 228 predicate places. [2023-01-28 08:55:31,307 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 344 transitions, 6180 flow [2023-01-28 08:55:31,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 165.22222222222223) internal successors, (2974), 18 states have internal predecessors, (2974), 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) [2023-01-28 08:55:31,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:31,308 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:31,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:31,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:31,514 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:31,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:31,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1140820281, now seen corresponding path program 22 times [2023-01-28 08:55:31,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:31,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398750830] [2023-01-28 08:55:31,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:31,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:32,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:32,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398750830] [2023-01-28 08:55:32,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398750830] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:32,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166182506] [2023-01-28 08:55:32,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 08:55:32,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:32,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:32,089 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:32,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 08:55:32,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 08:55:32,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:32,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:55:32,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:32,442 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:55:32,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 08:55:32,451 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:55:32,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:55:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:32,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:32,748 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:55:32,749 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 32 treesize of output 48 [2023-01-28 08:55:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:32,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166182506] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:32,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:32,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-28 08:55:32,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259018508] [2023-01-28 08:55:32,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:32,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 08:55:32,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:32,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 08:55:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-01-28 08:55:32,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:55:32,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 344 transitions, 6180 flow. Second operand has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 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) [2023-01-28 08:55:32,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:32,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:55:32,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:34,046 INFO L130 PetriNetUnfolder]: 1585/2873 cut-off events. [2023-01-28 08:55:34,046 INFO L131 PetriNetUnfolder]: For 49696/49696 co-relation queries the response was YES. [2023-01-28 08:55:34,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23581 conditions, 2873 events. 1585/2873 cut-off events. For 49696/49696 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 18379 event pairs, 378 based on Foata normal form. 8/2881 useless extension candidates. Maximal degree in co-relation 23438. Up to 1637 conditions per place. [2023-01-28 08:55:34,070 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 255 selfloop transitions, 185 changer transitions 4/444 dead transitions. [2023-01-28 08:55:34,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 444 transitions, 8415 flow [2023-01-28 08:55:34,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 08:55:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 08:55:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2868 transitions. [2023-01-28 08:55:34,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3450018044027427 [2023-01-28 08:55:34,072 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2868 transitions. [2023-01-28 08:55:34,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2868 transitions. [2023-01-28 08:55:34,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:34,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2868 transitions. [2023-01-28 08:55:34,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 168.7058823529412) internal successors, (2868), 17 states have internal predecessors, (2868), 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) [2023-01-28 08:55:34,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 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) [2023-01-28 08:55:34,079 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 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) [2023-01-28 08:55:34,079 INFO L175 Difference]: Start difference. First operand has 251 places, 344 transitions, 6180 flow. Second operand 17 states and 2868 transitions. [2023-01-28 08:55:34,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 444 transitions, 8415 flow [2023-01-28 08:55:34,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 444 transitions, 8048 flow, removed 15 selfloop flow, removed 11 redundant places. [2023-01-28 08:55:34,291 INFO L231 Difference]: Finished difference. Result has 259 places, 357 transitions, 6512 flow [2023-01-28 08:55:34,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=5817, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6512, PETRI_PLACES=259, PETRI_TRANSITIONS=357} [2023-01-28 08:55:34,291 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 236 predicate places. [2023-01-28 08:55:34,291 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 357 transitions, 6512 flow [2023-01-28 08:55:34,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 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) [2023-01-28 08:55:34,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:34,292 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:34,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:34,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-01-28 08:55:34,493 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:34,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:34,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1405470709, now seen corresponding path program 23 times [2023-01-28 08:55:34,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:34,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243395906] [2023-01-28 08:55:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:34,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:35,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:35,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243395906] [2023-01-28 08:55:35,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243395906] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:35,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955854766] [2023-01-28 08:55:35,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 08:55:35,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:35,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:35,141 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:35,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 08:55:35,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 08:55:35,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:35,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 08:55:35,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:35,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:35,752 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:55:35,753 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 32 treesize of output 48 [2023-01-28 08:55:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:35,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955854766] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:35,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:35,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 08:55:35,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139045891] [2023-01-28 08:55:35,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:35,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 08:55:35,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:35,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 08:55:35,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-01-28 08:55:35,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:55:35,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 357 transitions, 6512 flow. Second operand has 20 states, 20 states have (on average 165.2) internal successors, (3304), 20 states have internal predecessors, (3304), 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) [2023-01-28 08:55:35,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:35,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:55:35,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:36,721 INFO L130 PetriNetUnfolder]: 1733/3129 cut-off events. [2023-01-28 08:55:36,721 INFO L131 PetriNetUnfolder]: For 59994/59994 co-relation queries the response was YES. [2023-01-28 08:55:36,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26999 conditions, 3129 events. 1733/3129 cut-off events. For 59994/59994 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 20336 event pairs, 459 based on Foata normal form. 8/3137 useless extension candidates. Maximal degree in co-relation 26856. Up to 2275 conditions per place. [2023-01-28 08:55:36,747 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 210 selfloop transitions, 216 changer transitions 12/438 dead transitions. [2023-01-28 08:55:36,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 438 transitions, 8614 flow [2023-01-28 08:55:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 08:55:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 08:55:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1858 transitions. [2023-01-28 08:55:36,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3454173638222718 [2023-01-28 08:55:36,749 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1858 transitions. [2023-01-28 08:55:36,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1858 transitions. [2023-01-28 08:55:36,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:36,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1858 transitions. [2023-01-28 08:55:36,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.9090909090909) internal successors, (1858), 11 states have internal predecessors, (1858), 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) [2023-01-28 08:55:36,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 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) [2023-01-28 08:55:36,754 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 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) [2023-01-28 08:55:36,754 INFO L175 Difference]: Start difference. First operand has 259 places, 357 transitions, 6512 flow. Second operand 11 states and 1858 transitions. [2023-01-28 08:55:36,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 438 transitions, 8614 flow [2023-01-28 08:55:36,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 438 transitions, 8243 flow, removed 69 selfloop flow, removed 7 redundant places. [2023-01-28 08:55:36,935 INFO L231 Difference]: Finished difference. Result has 266 places, 408 transitions, 7804 flow [2023-01-28 08:55:36,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7804, PETRI_PLACES=266, PETRI_TRANSITIONS=408} [2023-01-28 08:55:36,936 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 243 predicate places. [2023-01-28 08:55:36,936 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 408 transitions, 7804 flow [2023-01-28 08:55:36,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.2) internal successors, (3304), 20 states have internal predecessors, (3304), 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) [2023-01-28 08:55:36,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:36,936 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:36,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:37,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:37,143 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:37,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:37,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1007976255, now seen corresponding path program 24 times [2023-01-28 08:55:37,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:37,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852910880] [2023-01-28 08:55:37,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:37,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:37,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:37,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852910880] [2023-01-28 08:55:37,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852910880] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:37,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543873598] [2023-01-28 08:55:37,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 08:55:37,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:37,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:37,741 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:37,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 08:55:37,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 08:55:37,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:37,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-28 08:55:37,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:38,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:38,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 08:55:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:38,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:38,428 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:55:38,429 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 32 treesize of output 48 [2023-01-28 08:55:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:38,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543873598] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:38,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:38,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-01-28 08:55:38,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643502039] [2023-01-28 08:55:38,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:38,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 08:55:38,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:38,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 08:55:38,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-01-28 08:55:38,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:55:38,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 408 transitions, 7804 flow. Second operand has 21 states, 21 states have (on average 165.04761904761904) internal successors, (3466), 21 states have internal predecessors, (3466), 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) [2023-01-28 08:55:38,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:38,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:55:38,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:39,872 INFO L130 PetriNetUnfolder]: 1833/3323 cut-off events. [2023-01-28 08:55:39,872 INFO L131 PetriNetUnfolder]: For 70466/70466 co-relation queries the response was YES. [2023-01-28 08:55:39,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30426 conditions, 3323 events. 1833/3323 cut-off events. For 70466/70466 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 21814 event pairs, 397 based on Foata normal form. 40/3363 useless extension candidates. Maximal degree in co-relation 30278. Up to 1831 conditions per place. [2023-01-28 08:55:39,900 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 276 selfloop transitions, 213 changer transitions 4/493 dead transitions. [2023-01-28 08:55:39,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 493 transitions, 10182 flow [2023-01-28 08:55:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 08:55:39,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 08:55:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2708 transitions. [2023-01-28 08:55:39,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34611451942740284 [2023-01-28 08:55:39,903 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2708 transitions. [2023-01-28 08:55:39,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2708 transitions. [2023-01-28 08:55:39,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:39,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2708 transitions. [2023-01-28 08:55:39,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 169.25) internal successors, (2708), 16 states have internal predecessors, (2708), 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) [2023-01-28 08:55:39,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 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) [2023-01-28 08:55:39,910 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 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) [2023-01-28 08:55:39,910 INFO L175 Difference]: Start difference. First operand has 266 places, 408 transitions, 7804 flow. Second operand 16 states and 2708 transitions. [2023-01-28 08:55:39,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 493 transitions, 10182 flow [2023-01-28 08:55:40,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 493 transitions, 10002 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-01-28 08:55:40,173 INFO L231 Difference]: Finished difference. Result has 280 places, 425 transitions, 8825 flow [2023-01-28 08:55:40,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=7661, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8825, PETRI_PLACES=280, PETRI_TRANSITIONS=425} [2023-01-28 08:55:40,174 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 257 predicate places. [2023-01-28 08:55:40,174 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 425 transitions, 8825 flow [2023-01-28 08:55:40,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.04761904761904) internal successors, (3466), 21 states have internal predecessors, (3466), 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) [2023-01-28 08:55:40,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:40,175 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:40,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:40,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:40,375 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:40,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:40,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2084366075, now seen corresponding path program 25 times [2023-01-28 08:55:40,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:40,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581191426] [2023-01-28 08:55:40,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:40,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:40,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:40,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581191426] [2023-01-28 08:55:40,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581191426] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:40,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868184797] [2023-01-28 08:55:40,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 08:55:40,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:40,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:40,848 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:40,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 08:55:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:41,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:55:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:41,125 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:55:41,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 08:55:41,133 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:55:41,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:55:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:41,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:41,392 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:55:41,392 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 32 treesize of output 48 [2023-01-28 08:55:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:41,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868184797] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:41,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:41,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 08:55:41,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466519687] [2023-01-28 08:55:41,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:41,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 08:55:41,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:41,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 08:55:41,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-01-28 08:55:41,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:55:41,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 425 transitions, 8825 flow. Second operand has 20 states, 20 states have (on average 165.3) internal successors, (3306), 20 states have internal predecessors, (3306), 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) [2023-01-28 08:55:41,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:41,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:55:41,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:42,616 INFO L130 PetriNetUnfolder]: 1841/3335 cut-off events. [2023-01-28 08:55:42,617 INFO L131 PetriNetUnfolder]: For 79761/79761 co-relation queries the response was YES. [2023-01-28 08:55:42,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32404 conditions, 3335 events. 1841/3335 cut-off events. For 79761/79761 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 21931 event pairs, 431 based on Foata normal form. 16/3351 useless extension candidates. Maximal degree in co-relation 32250. Up to 2087 conditions per place. [2023-01-28 08:55:42,651 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 275 selfloop transitions, 196 changer transitions 9/480 dead transitions. [2023-01-28 08:55:42,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 480 transitions, 10614 flow [2023-01-28 08:55:42,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 08:55:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 08:55:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2528 transitions. [2023-01-28 08:55:42,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34464894342194957 [2023-01-28 08:55:42,654 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2528 transitions. [2023-01-28 08:55:42,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2528 transitions. [2023-01-28 08:55:42,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:42,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2528 transitions. [2023-01-28 08:55:42,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 168.53333333333333) internal successors, (2528), 15 states have internal predecessors, (2528), 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) [2023-01-28 08:55:42,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:55:42,660 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:55:42,660 INFO L175 Difference]: Start difference. First operand has 280 places, 425 transitions, 8825 flow. Second operand 15 states and 2528 transitions. [2023-01-28 08:55:42,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 480 transitions, 10614 flow [2023-01-28 08:55:42,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 480 transitions, 10286 flow, removed 88 selfloop flow, removed 7 redundant places. [2023-01-28 08:55:42,886 INFO L231 Difference]: Finished difference. Result has 287 places, 422 transitions, 8958 flow [2023-01-28 08:55:42,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=8443, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8958, PETRI_PLACES=287, PETRI_TRANSITIONS=422} [2023-01-28 08:55:42,887 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 264 predicate places. [2023-01-28 08:55:42,887 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 422 transitions, 8958 flow [2023-01-28 08:55:42,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.3) internal successors, (3306), 20 states have internal predecessors, (3306), 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) [2023-01-28 08:55:42,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:42,887 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:42,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-01-28 08:55:43,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:43,088 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:43,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:43,088 INFO L85 PathProgramCache]: Analyzing trace with hash 840106411, now seen corresponding path program 26 times [2023-01-28 08:55:43,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:43,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329189514] [2023-01-28 08:55:43,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:43,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:43,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:43,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329189514] [2023-01-28 08:55:43,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329189514] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:43,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200884157] [2023-01-28 08:55:43,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:55:43,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:43,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:43,683 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:43,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 08:55:43,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:55:43,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:43,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:55:43,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:44,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:44,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 08:55:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:44,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:44,310 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:55:44,311 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 32 treesize of output 48 [2023-01-28 08:55:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:44,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200884157] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:44,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:44,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 08:55:44,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835189632] [2023-01-28 08:55:44,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:44,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 08:55:44,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:44,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 08:55:44,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-01-28 08:55:44,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:55:44,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 422 transitions, 8958 flow. Second operand has 20 states, 20 states have (on average 165.3) internal successors, (3306), 20 states have internal predecessors, (3306), 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) [2023-01-28 08:55:44,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:44,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:55:44,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:45,646 INFO L130 PetriNetUnfolder]: 1797/3233 cut-off events. [2023-01-28 08:55:45,646 INFO L131 PetriNetUnfolder]: For 79108/79108 co-relation queries the response was YES. [2023-01-28 08:55:45,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32298 conditions, 3233 events. 1797/3233 cut-off events. For 79108/79108 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 20995 event pairs, 407 based on Foata normal form. 8/3241 useless extension candidates. Maximal degree in co-relation 32142. Up to 2027 conditions per place. [2023-01-28 08:55:45,738 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 260 selfloop transitions, 201 changer transitions 8/469 dead transitions. [2023-01-28 08:55:45,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 469 transitions, 10534 flow [2023-01-28 08:55:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 08:55:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 08:55:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2687 transitions. [2023-01-28 08:55:45,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3434304703476483 [2023-01-28 08:55:45,741 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2687 transitions. [2023-01-28 08:55:45,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2687 transitions. [2023-01-28 08:55:45,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:45,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2687 transitions. [2023-01-28 08:55:45,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 167.9375) internal successors, (2687), 16 states have internal predecessors, (2687), 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) [2023-01-28 08:55:45,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 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) [2023-01-28 08:55:45,746 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 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) [2023-01-28 08:55:45,746 INFO L175 Difference]: Start difference. First operand has 287 places, 422 transitions, 8958 flow. Second operand 16 states and 2687 transitions. [2023-01-28 08:55:45,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 469 transitions, 10534 flow [2023-01-28 08:55:45,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 469 transitions, 10099 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-01-28 08:55:45,969 INFO L231 Difference]: Finished difference. Result has 287 places, 419 transitions, 8868 flow [2023-01-28 08:55:45,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=8485, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8868, PETRI_PLACES=287, PETRI_TRANSITIONS=419} [2023-01-28 08:55:45,970 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 264 predicate places. [2023-01-28 08:55:45,970 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 419 transitions, 8868 flow [2023-01-28 08:55:45,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.3) internal successors, (3306), 20 states have internal predecessors, (3306), 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) [2023-01-28 08:55:45,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:45,971 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:45,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:46,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-01-28 08:55:46,171 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:46,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:46,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1157324161, now seen corresponding path program 27 times [2023-01-28 08:55:46,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:46,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958282469] [2023-01-28 08:55:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:46,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:46,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:46,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958282469] [2023-01-28 08:55:46,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958282469] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:46,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422940441] [2023-01-28 08:55:46,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 08:55:46,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:46,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:46,670 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:46,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 08:55:46,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 08:55:46,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:46,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-28 08:55:46,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:47,033 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:55:47,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:55:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:47,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:47,468 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:55:47,469 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 32 treesize of output 48 [2023-01-28 08:55:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:47,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422940441] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:47,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:47,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 23 [2023-01-28 08:55:47,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621123488] [2023-01-28 08:55:47,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:47,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 08:55:47,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:47,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 08:55:47,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-01-28 08:55:47,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-28 08:55:47,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 419 transitions, 8868 flow. Second operand has 23 states, 23 states have (on average 162.08695652173913) internal successors, (3728), 23 states have internal predecessors, (3728), 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) [2023-01-28 08:55:47,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:47,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-28 08:55:47,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:48,808 INFO L130 PetriNetUnfolder]: 1857/3327 cut-off events. [2023-01-28 08:55:48,808 INFO L131 PetriNetUnfolder]: For 78321/78321 co-relation queries the response was YES. [2023-01-28 08:55:48,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33676 conditions, 3327 events. 1857/3327 cut-off events. For 78321/78321 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 21599 event pairs, 205 based on Foata normal form. 20/3347 useless extension candidates. Maximal degree in co-relation 33520. Up to 2280 conditions per place. [2023-01-28 08:55:48,837 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 228 selfloop transitions, 250 changer transitions 2/480 dead transitions. [2023-01-28 08:55:48,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 480 transitions, 10716 flow [2023-01-28 08:55:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 08:55:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 08:55:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2813 transitions. [2023-01-28 08:55:48,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33838566101287143 [2023-01-28 08:55:48,840 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2813 transitions. [2023-01-28 08:55:48,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2813 transitions. [2023-01-28 08:55:48,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:48,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2813 transitions. [2023-01-28 08:55:48,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 165.47058823529412) internal successors, (2813), 17 states have internal predecessors, (2813), 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) [2023-01-28 08:55:48,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 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) [2023-01-28 08:55:48,845 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 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) [2023-01-28 08:55:48,845 INFO L175 Difference]: Start difference. First operand has 287 places, 419 transitions, 8868 flow. Second operand 17 states and 2813 transitions. [2023-01-28 08:55:48,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 480 transitions, 10716 flow [2023-01-28 08:55:49,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 480 transitions, 10319 flow, removed 16 selfloop flow, removed 16 redundant places. [2023-01-28 08:55:49,089 INFO L231 Difference]: Finished difference. Result has 288 places, 437 transitions, 9768 flow [2023-01-28 08:55:49,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=8474, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9768, PETRI_PLACES=288, PETRI_TRANSITIONS=437} [2023-01-28 08:55:49,090 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 265 predicate places. [2023-01-28 08:55:49,090 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 437 transitions, 9768 flow [2023-01-28 08:55:49,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 162.08695652173913) internal successors, (3728), 23 states have internal predecessors, (3728), 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) [2023-01-28 08:55:49,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:49,090 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:49,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:49,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-28 08:55:49,296 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:49,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:49,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2046803309, now seen corresponding path program 28 times [2023-01-28 08:55:49,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:49,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545983317] [2023-01-28 08:55:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:49,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:49,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:49,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545983317] [2023-01-28 08:55:49,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545983317] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:49,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581712198] [2023-01-28 08:55:49,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 08:55:49,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:49,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:49,877 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:49,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 08:55:50,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 08:55:50,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:50,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:55:50,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:50,182 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:55:50,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 08:55:50,189 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:55:50,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:55:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:50,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:50,392 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:55:50,393 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 40 treesize of output 56 [2023-01-28 08:55:50,416 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:55:50,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 08:55:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:50,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581712198] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:50,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:50,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-28 08:55:50,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690427232] [2023-01-28 08:55:50,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:50,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 08:55:50,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:50,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 08:55:50,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-01-28 08:55:50,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:55:50,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 437 transitions, 9768 flow. Second operand has 19 states, 19 states have (on average 165.10526315789474) internal successors, (3137), 19 states have internal predecessors, (3137), 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) [2023-01-28 08:55:50,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:50,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:55:50,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:52,049 INFO L130 PetriNetUnfolder]: 1961/3519 cut-off events. [2023-01-28 08:55:52,049 INFO L131 PetriNetUnfolder]: For 94948/94948 co-relation queries the response was YES. [2023-01-28 08:55:52,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37145 conditions, 3519 events. 1961/3519 cut-off events. For 94948/94948 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 23223 event pairs, 369 based on Foata normal form. 8/3527 useless extension candidates. Maximal degree in co-relation 36986. Up to 1883 conditions per place. [2023-01-28 08:55:52,082 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 286 selfloop transitions, 235 changer transitions 4/525 dead transitions. [2023-01-28 08:55:52,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 525 transitions, 12358 flow [2023-01-28 08:55:52,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 08:55:52,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 08:55:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3198 transitions. [2023-01-28 08:55:52,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34420406845334195 [2023-01-28 08:55:52,085 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3198 transitions. [2023-01-28 08:55:52,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3198 transitions. [2023-01-28 08:55:52,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:52,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3198 transitions. [2023-01-28 08:55:52,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 168.31578947368422) internal successors, (3198), 19 states have internal predecessors, (3198), 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) [2023-01-28 08:55:52,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 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) [2023-01-28 08:55:52,090 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 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) [2023-01-28 08:55:52,090 INFO L175 Difference]: Start difference. First operand has 288 places, 437 transitions, 9768 flow. Second operand 19 states and 3198 transitions. [2023-01-28 08:55:52,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 525 transitions, 12358 flow [2023-01-28 08:55:52,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 525 transitions, 11910 flow, removed 61 selfloop flow, removed 10 redundant places. [2023-01-28 08:55:52,400 INFO L231 Difference]: Finished difference. Result has 300 places, 452 transitions, 10370 flow [2023-01-28 08:55:52,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=9340, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10370, PETRI_PLACES=300, PETRI_TRANSITIONS=452} [2023-01-28 08:55:52,400 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 277 predicate places. [2023-01-28 08:55:52,401 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 452 transitions, 10370 flow [2023-01-28 08:55:52,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.10526315789474) internal successors, (3137), 19 states have internal predecessors, (3137), 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) [2023-01-28 08:55:52,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:52,401 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:52,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-01-28 08:55:52,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:52,602 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:52,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:52,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1064638639, now seen corresponding path program 29 times [2023-01-28 08:55:52,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:52,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978492387] [2023-01-28 08:55:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:52,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:53,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:53,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978492387] [2023-01-28 08:55:53,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978492387] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:53,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751332132] [2023-01-28 08:55:53,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 08:55:53,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:53,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:53,085 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:53,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 08:55:53,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 08:55:53,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:53,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:55:53,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:53,436 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:55:53,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 32 [2023-01-28 08:55:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:53,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:53,591 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:55:53,592 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 40 treesize of output 56 [2023-01-28 08:55:53,609 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:55:53,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 08:55:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:53,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751332132] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:53,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:53,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-28 08:55:53,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426098866] [2023-01-28 08:55:53,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:53,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 08:55:53,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:53,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 08:55:53,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-01-28 08:55:53,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:55:53,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 452 transitions, 10370 flow. Second operand has 19 states, 19 states have (on average 165.31578947368422) internal successors, (3141), 19 states have internal predecessors, (3141), 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) [2023-01-28 08:55:53,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:53,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:55:53,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:54,715 INFO L130 PetriNetUnfolder]: 1953/3511 cut-off events. [2023-01-28 08:55:54,715 INFO L131 PetriNetUnfolder]: For 103005/103005 co-relation queries the response was YES. [2023-01-28 08:55:54,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38155 conditions, 3511 events. 1953/3511 cut-off events. For 103005/103005 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 23238 event pairs, 507 based on Foata normal form. 8/3519 useless extension candidates. Maximal degree in co-relation 37994. Up to 2517 conditions per place. [2023-01-28 08:55:54,751 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 218 selfloop transitions, 251 changer transitions 11/480 dead transitions. [2023-01-28 08:55:54,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 480 transitions, 11608 flow [2023-01-28 08:55:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 08:55:54,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 08:55:54,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1857 transitions. [2023-01-28 08:55:54,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3452314556609035 [2023-01-28 08:55:54,753 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1857 transitions. [2023-01-28 08:55:54,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1857 transitions. [2023-01-28 08:55:54,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:54,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1857 transitions. [2023-01-28 08:55:54,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.8181818181818) internal successors, (1857), 11 states have internal predecessors, (1857), 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) [2023-01-28 08:55:54,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 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) [2023-01-28 08:55:54,756 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 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) [2023-01-28 08:55:54,756 INFO L175 Difference]: Start difference. First operand has 300 places, 452 transitions, 10370 flow. Second operand 11 states and 1857 transitions. [2023-01-28 08:55:54,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 480 transitions, 11608 flow [2023-01-28 08:55:55,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 480 transitions, 11361 flow, removed 85 selfloop flow, removed 8 redundant places. [2023-01-28 08:55:55,177 INFO L231 Difference]: Finished difference. Result has 305 places, 453 transitions, 10870 flow [2023-01-28 08:55:55,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=10123, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10870, PETRI_PLACES=305, PETRI_TRANSITIONS=453} [2023-01-28 08:55:55,178 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 282 predicate places. [2023-01-28 08:55:55,178 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 453 transitions, 10870 flow [2023-01-28 08:55:55,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.31578947368422) internal successors, (3141), 19 states have internal predecessors, (3141), 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) [2023-01-28 08:55:55,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:55,179 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:55,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:55,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-28 08:55:55,385 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:55,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:55,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1348808325, now seen corresponding path program 30 times [2023-01-28 08:55:55,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:55,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763591871] [2023-01-28 08:55:55,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:55,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:55,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:55,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763591871] [2023-01-28 08:55:55,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763591871] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:55,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87158924] [2023-01-28 08:55:55,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 08:55:55,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:55,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:55,886 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:55,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 08:55:56,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 08:55:56,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:55:56,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:55:56,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:56,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:55:56,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 08:55:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:56,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:56,420 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:55:56,420 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 40 treesize of output 56 [2023-01-28 08:55:56,434 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:55:56,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 08:55:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:56,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87158924] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:56,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:56,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-28 08:55:56,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246024127] [2023-01-28 08:55:56,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:56,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 08:55:56,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:56,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 08:55:56,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-01-28 08:55:56,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:55:56,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 453 transitions, 10870 flow. Second operand has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 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) [2023-01-28 08:55:56,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:56,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:55:56,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:55:57,682 INFO L130 PetriNetUnfolder]: 1987/3563 cut-off events. [2023-01-28 08:55:57,682 INFO L131 PetriNetUnfolder]: For 111326/111326 co-relation queries the response was YES. [2023-01-28 08:55:57,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39977 conditions, 3563 events. 1987/3563 cut-off events. For 111326/111326 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 23549 event pairs, 391 based on Foata normal form. 8/3571 useless extension candidates. Maximal degree in co-relation 39812. Up to 1971 conditions per place. [2023-01-28 08:55:57,715 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 271 selfloop transitions, 235 changer transitions 2/508 dead transitions. [2023-01-28 08:55:57,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 508 transitions, 12800 flow [2023-01-28 08:55:57,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 08:55:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 08:55:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2358 transitions. [2023-01-28 08:55:57,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3444347063978966 [2023-01-28 08:55:57,717 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2358 transitions. [2023-01-28 08:55:57,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2358 transitions. [2023-01-28 08:55:57,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:55:57,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2358 transitions. [2023-01-28 08:55:57,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 168.42857142857142) internal successors, (2358), 14 states have internal predecessors, (2358), 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) [2023-01-28 08:55:57,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:55:57,723 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:55:57,723 INFO L175 Difference]: Start difference. First operand has 305 places, 453 transitions, 10870 flow. Second operand 14 states and 2358 transitions. [2023-01-28 08:55:57,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 508 transitions, 12800 flow [2023-01-28 08:55:58,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 508 transitions, 12588 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-01-28 08:55:58,053 INFO L231 Difference]: Finished difference. Result has 310 places, 459 transitions, 11338 flow [2023-01-28 08:55:58,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=10664, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11338, PETRI_PLACES=310, PETRI_TRANSITIONS=459} [2023-01-28 08:55:58,054 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 287 predicate places. [2023-01-28 08:55:58,054 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 459 transitions, 11338 flow [2023-01-28 08:55:58,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 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) [2023-01-28 08:55:58,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:55:58,054 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:55:58,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-28 08:55:58,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 08:55:58,257 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:55:58,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:55:58,257 INFO L85 PathProgramCache]: Analyzing trace with hash -691507321, now seen corresponding path program 31 times [2023-01-28 08:55:58,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:55:58,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129691386] [2023-01-28 08:55:58,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:55:58,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:55:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:58,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:55:58,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129691386] [2023-01-28 08:55:58,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129691386] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:55:58,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595492219] [2023-01-28 08:55:58,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 08:55:58,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:55:58,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:55:58,764 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:55:58,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-28 08:55:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:55:58,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:55:58,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:55:59,115 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:55:59,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 08:55:59,123 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:55:59,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:55:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:59,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:55:59,372 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-28 08:55:59,372 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 82 treesize of output 99 [2023-01-28 08:55:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:55:59,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595492219] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:55:59,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:55:59,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 08:55:59,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173889936] [2023-01-28 08:55:59,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:55:59,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 08:55:59,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:55:59,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 08:55:59,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-01-28 08:55:59,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:55:59,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 459 transitions, 11338 flow. Second operand has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 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) [2023-01-28 08:55:59,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:55:59,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:55:59,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:56:01,361 INFO L130 PetriNetUnfolder]: 2103/3775 cut-off events. [2023-01-28 08:56:01,361 INFO L131 PetriNetUnfolder]: For 128633/128633 co-relation queries the response was YES. [2023-01-28 08:56:01,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44016 conditions, 3775 events. 2103/3775 cut-off events. For 128633/128633 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 25252 event pairs, 396 based on Foata normal form. 8/3783 useless extension candidates. Maximal degree in co-relation 43850. Up to 2007 conditions per place. [2023-01-28 08:56:01,395 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 300 selfloop transitions, 248 changer transitions 7/555 dead transitions. [2023-01-28 08:56:01,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 555 transitions, 14179 flow [2023-01-28 08:56:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 08:56:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 08:56:01,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3698 transitions. [2023-01-28 08:56:01,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34374419036995724 [2023-01-28 08:56:01,398 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3698 transitions. [2023-01-28 08:56:01,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3698 transitions. [2023-01-28 08:56:01,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:56:01,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3698 transitions. [2023-01-28 08:56:01,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 168.0909090909091) internal successors, (3698), 22 states have internal predecessors, (3698), 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) [2023-01-28 08:56:01,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 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) [2023-01-28 08:56:01,405 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 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) [2023-01-28 08:56:01,405 INFO L175 Difference]: Start difference. First operand has 310 places, 459 transitions, 11338 flow. Second operand 22 states and 3698 transitions. [2023-01-28 08:56:01,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 555 transitions, 14179 flow [2023-01-28 08:56:01,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 555 transitions, 13655 flow, removed 23 selfloop flow, removed 9 redundant places. [2023-01-28 08:56:01,795 INFO L231 Difference]: Finished difference. Result has 327 places, 474 transitions, 11984 flow [2023-01-28 08:56:01,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=10831, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11984, PETRI_PLACES=327, PETRI_TRANSITIONS=474} [2023-01-28 08:56:01,795 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 304 predicate places. [2023-01-28 08:56:01,796 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 474 transitions, 11984 flow [2023-01-28 08:56:01,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 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) [2023-01-28 08:56:01,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:56:01,796 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:56:01,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-28 08:56:01,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 08:56:01,997 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:56:01,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:56:01,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1869769151, now seen corresponding path program 32 times [2023-01-28 08:56:01,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:56:01,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720768955] [2023-01-28 08:56:01,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:56:01,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:56:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:02,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:56:02,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720768955] [2023-01-28 08:56:02,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720768955] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:56:02,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805384608] [2023-01-28 08:56:02,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:56:02,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:02,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:56:02,426 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:56:02,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-28 08:56:02,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:56:02,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:56:02,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 08:56:02,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:56:02,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:56:02,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-01-28 08:56:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:02,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:56:03,011 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:56:03,012 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 40 treesize of output 56 [2023-01-28 08:56:03,027 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:56:03,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 08:56:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:03,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805384608] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:56:03,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:56:03,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 08:56:03,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595127796] [2023-01-28 08:56:03,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:56:03,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 08:56:03,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:56:03,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 08:56:03,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-01-28 08:56:03,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:56:03,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 474 transitions, 11984 flow. Second operand has 20 states, 20 states have (on average 165.3) internal successors, (3306), 20 states have internal predecessors, (3306), 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) [2023-01-28 08:56:03,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:56:03,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:56:03,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:56:04,421 INFO L130 PetriNetUnfolder]: 2073/3715 cut-off events. [2023-01-28 08:56:04,421 INFO L131 PetriNetUnfolder]: For 133981/133981 co-relation queries the response was YES. [2023-01-28 08:56:04,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44383 conditions, 3715 events. 2073/3715 cut-off events. For 133981/133981 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 24738 event pairs, 447 based on Foata normal form. 16/3731 useless extension candidates. Maximal degree in co-relation 44212. Up to 2225 conditions per place. [2023-01-28 08:56:04,458 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 288 selfloop transitions, 228 changer transitions 8/524 dead transitions. [2023-01-28 08:56:04,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 524 transitions, 13762 flow [2023-01-28 08:56:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 08:56:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 08:56:04,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2364 transitions. [2023-01-28 08:56:04,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3453111305872042 [2023-01-28 08:56:04,460 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2364 transitions. [2023-01-28 08:56:04,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2364 transitions. [2023-01-28 08:56:04,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:56:04,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2364 transitions. [2023-01-28 08:56:04,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 168.85714285714286) internal successors, (2364), 14 states have internal predecessors, (2364), 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) [2023-01-28 08:56:04,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:56:04,464 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:56:04,464 INFO L175 Difference]: Start difference. First operand has 327 places, 474 transitions, 11984 flow. Second operand 14 states and 2364 transitions. [2023-01-28 08:56:04,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 524 transitions, 13762 flow [2023-01-28 08:56:04,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 524 transitions, 13413 flow, removed 101 selfloop flow, removed 9 redundant places. [2023-01-28 08:56:05,004 INFO L231 Difference]: Finished difference. Result has 329 places, 469 transitions, 12001 flow [2023-01-28 08:56:05,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=11563, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12001, PETRI_PLACES=329, PETRI_TRANSITIONS=469} [2023-01-28 08:56:05,006 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 306 predicate places. [2023-01-28 08:56:05,006 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 469 transitions, 12001 flow [2023-01-28 08:56:05,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.3) internal successors, (3306), 20 states have internal predecessors, (3306), 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) [2023-01-28 08:56:05,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:56:05,006 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:56:05,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-28 08:56:05,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:05,213 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:56:05,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:56:05,213 INFO L85 PathProgramCache]: Analyzing trace with hash 499274341, now seen corresponding path program 33 times [2023-01-28 08:56:05,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:56:05,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473084995] [2023-01-28 08:56:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:56:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:56:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:05,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:56:05,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473084995] [2023-01-28 08:56:05,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473084995] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:56:05,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720560337] [2023-01-28 08:56:05,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 08:56:05,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:05,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:56:05,783 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:56:05,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-28 08:56:06,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 08:56:06,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:56:06,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:56:06,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:56:06,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:56:06,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 08:56:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:06,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:56:06,360 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:56:06,360 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 40 treesize of output 56 [2023-01-28 08:56:06,374 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:56:06,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 08:56:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:06,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720560337] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:56:06,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:56:06,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 08:56:06,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496928788] [2023-01-28 08:56:06,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:56:06,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 08:56:06,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:56:06,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 08:56:06,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-01-28 08:56:06,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:56:06,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 469 transitions, 12001 flow. Second operand has 20 states, 20 states have (on average 165.3) internal successors, (3306), 20 states have internal predecessors, (3306), 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) [2023-01-28 08:56:06,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:56:06,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:56:06,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:56:07,942 INFO L130 PetriNetUnfolder]: 2041/3645 cut-off events. [2023-01-28 08:56:07,942 INFO L131 PetriNetUnfolder]: For 133115/133115 co-relation queries the response was YES. [2023-01-28 08:56:07,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44190 conditions, 3645 events. 2041/3645 cut-off events. For 133115/133115 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 24080 event pairs, 447 based on Foata normal form. 8/3653 useless extension candidates. Maximal degree in co-relation 44018. Up to 2223 conditions per place. [2023-01-28 08:56:07,984 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 269 selfloop transitions, 236 changer transitions 6/511 dead transitions. [2023-01-28 08:56:07,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 511 transitions, 13682 flow [2023-01-28 08:56:07,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 08:56:07,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 08:56:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2685 transitions. [2023-01-28 08:56:07,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34317484662576686 [2023-01-28 08:56:07,986 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2685 transitions. [2023-01-28 08:56:07,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2685 transitions. [2023-01-28 08:56:07,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:56:07,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2685 transitions. [2023-01-28 08:56:07,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 167.8125) internal successors, (2685), 16 states have internal predecessors, (2685), 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) [2023-01-28 08:56:07,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 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) [2023-01-28 08:56:07,991 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 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) [2023-01-28 08:56:07,991 INFO L175 Difference]: Start difference. First operand has 329 places, 469 transitions, 12001 flow. Second operand 16 states and 2685 transitions. [2023-01-28 08:56:07,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 511 transitions, 13682 flow [2023-01-28 08:56:08,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 511 transitions, 13408 flow, removed 12 selfloop flow, removed 10 redundant places. [2023-01-28 08:56:08,599 INFO L231 Difference]: Finished difference. Result has 332 places, 466 transitions, 12166 flow [2023-01-28 08:56:08,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=11706, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12166, PETRI_PLACES=332, PETRI_TRANSITIONS=466} [2023-01-28 08:56:08,600 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 309 predicate places. [2023-01-28 08:56:08,600 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 466 transitions, 12166 flow [2023-01-28 08:56:08,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.3) internal successors, (3306), 20 states have internal predecessors, (3306), 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) [2023-01-28 08:56:08,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:56:08,601 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:56:08,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-01-28 08:56:08,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:08,807 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:56:08,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:56:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash 816492091, now seen corresponding path program 34 times [2023-01-28 08:56:08,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:56:08,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025800504] [2023-01-28 08:56:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:56:08,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:56:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:09,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:56:09,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025800504] [2023-01-28 08:56:09,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025800504] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:56:09,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054464886] [2023-01-28 08:56:09,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 08:56:09,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:09,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:56:09,241 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:56:09,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-28 08:56:09,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 08:56:09,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:56:09,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:56:09,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:56:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:09,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:56:09,779 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:56:09,779 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 40 treesize of output 56 [2023-01-28 08:56:09,794 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:56:09,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 08:56:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:09,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054464886] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:56:09,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:56:09,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-01-28 08:56:09,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287887697] [2023-01-28 08:56:09,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:56:09,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 08:56:09,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:56:09,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 08:56:09,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-01-28 08:56:09,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:56:09,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 466 transitions, 12166 flow. Second operand has 18 states, 18 states have (on average 165.22222222222223) internal successors, (2974), 18 states have internal predecessors, (2974), 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) [2023-01-28 08:56:09,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:56:09,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:56:09,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:56:11,057 INFO L130 PetriNetUnfolder]: 2063/3663 cut-off events. [2023-01-28 08:56:11,058 INFO L131 PetriNetUnfolder]: For 135397/135397 co-relation queries the response was YES. [2023-01-28 08:56:11,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45031 conditions, 3663 events. 2063/3663 cut-off events. For 135397/135397 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 24015 event pairs, 398 based on Foata normal form. 8/3671 useless extension candidates. Maximal degree in co-relation 44860. Up to 2021 conditions per place. [2023-01-28 08:56:11,093 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 274 selfloop transitions, 236 changer transitions 2/512 dead transitions. [2023-01-28 08:56:11,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 512 transitions, 14014 flow [2023-01-28 08:56:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 08:56:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 08:56:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2019 transitions. [2023-01-28 08:56:11,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3440695296523517 [2023-01-28 08:56:11,095 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2019 transitions. [2023-01-28 08:56:11,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2019 transitions. [2023-01-28 08:56:11,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:56:11,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2019 transitions. [2023-01-28 08:56:11,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 168.25) internal successors, (2019), 12 states have internal predecessors, (2019), 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) [2023-01-28 08:56:11,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 08:56:11,100 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 08:56:11,100 INFO L175 Difference]: Start difference. First operand has 332 places, 466 transitions, 12166 flow. Second operand 12 states and 2019 transitions. [2023-01-28 08:56:11,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 512 transitions, 14014 flow [2023-01-28 08:56:11,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 512 transitions, 13525 flow, removed 44 selfloop flow, removed 15 redundant places. [2023-01-28 08:56:11,547 INFO L231 Difference]: Finished difference. Result has 326 places, 468 transitions, 12477 flow [2023-01-28 08:56:11,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=11684, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12477, PETRI_PLACES=326, PETRI_TRANSITIONS=468} [2023-01-28 08:56:11,548 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 303 predicate places. [2023-01-28 08:56:11,549 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 468 transitions, 12477 flow [2023-01-28 08:56:11,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 165.22222222222223) internal successors, (2974), 18 states have internal predecessors, (2974), 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) [2023-01-28 08:56:11,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:56:11,549 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:56:11,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-01-28 08:56:11,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-01-28 08:56:11,756 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:56:11,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:56:11,756 INFO L85 PathProgramCache]: Analyzing trace with hash -675003441, now seen corresponding path program 35 times [2023-01-28 08:56:11,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:56:11,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162562635] [2023-01-28 08:56:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:56:11,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:56:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:12,175 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:12,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:56:12,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162562635] [2023-01-28 08:56:12,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162562635] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:56:12,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024915376] [2023-01-28 08:56:12,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 08:56:12,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:12,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:56:12,176 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:56:12,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-28 08:56:12,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 08:56:12,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:56:12,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:56:12,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:56:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:12,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:56:12,782 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-28 08:56:12,782 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 82 treesize of output 99 [2023-01-28 08:56:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:12,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024915376] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:56:12,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:56:12,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-28 08:56:12,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241500503] [2023-01-28 08:56:12,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:56:12,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 08:56:12,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:56:12,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 08:56:12,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-01-28 08:56:12,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:56:12,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 468 transitions, 12477 flow. Second operand has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 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) [2023-01-28 08:56:12,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:56:12,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:56:12,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:56:14,364 INFO L130 PetriNetUnfolder]: 2127/3751 cut-off events. [2023-01-28 08:56:14,365 INFO L131 PetriNetUnfolder]: For 148081/148081 co-relation queries the response was YES. [2023-01-28 08:56:14,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47242 conditions, 3751 events. 2127/3751 cut-off events. For 148081/148081 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 24557 event pairs, 361 based on Foata normal form. 8/3759 useless extension candidates. Maximal degree in co-relation 47072. Up to 1993 conditions per place. [2023-01-28 08:56:14,403 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 283 selfloop transitions, 250 changer transitions 2/535 dead transitions. [2023-01-28 08:56:14,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 535 transitions, 14784 flow [2023-01-28 08:56:14,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 08:56:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 08:56:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2688 transitions. [2023-01-28 08:56:14,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34355828220858897 [2023-01-28 08:56:14,405 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2688 transitions. [2023-01-28 08:56:14,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2688 transitions. [2023-01-28 08:56:14,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:56:14,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2688 transitions. [2023-01-28 08:56:14,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 168.0) internal successors, (2688), 16 states have internal predecessors, (2688), 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) [2023-01-28 08:56:14,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 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) [2023-01-28 08:56:14,410 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 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) [2023-01-28 08:56:14,410 INFO L175 Difference]: Start difference. First operand has 326 places, 468 transitions, 12477 flow. Second operand 16 states and 2688 transitions. [2023-01-28 08:56:14,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 535 transitions, 14784 flow [2023-01-28 08:56:14,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 535 transitions, 14613 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-01-28 08:56:14,844 INFO L231 Difference]: Finished difference. Result has 332 places, 475 transitions, 13364 flow [2023-01-28 08:56:14,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=12248, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13364, PETRI_PLACES=332, PETRI_TRANSITIONS=475} [2023-01-28 08:56:14,845 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 309 predicate places. [2023-01-28 08:56:14,845 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 475 transitions, 13364 flow [2023-01-28 08:56:14,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 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) [2023-01-28 08:56:14,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:56:14,846 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:56:14,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-28 08:56:15,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-01-28 08:56:15,052 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:56:15,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:56:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash 269100067, now seen corresponding path program 36 times [2023-01-28 08:56:15,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:56:15,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558956412] [2023-01-28 08:56:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:56:15,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:56:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:15,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:56:15,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558956412] [2023-01-28 08:56:15,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558956412] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:56:15,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247773423] [2023-01-28 08:56:15,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 08:56:15,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:15,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:56:15,528 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:56:15,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-28 08:56:15,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 08:56:15,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:56:15,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 08:56:15,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:56:15,864 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 39 treesize of output 23 [2023-01-28 08:56:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:15,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:56:15,998 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-28 08:56:15,999 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 82 treesize of output 99 [2023-01-28 08:56:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:16,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247773423] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:56:16,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:56:16,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-28 08:56:16,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306538331] [2023-01-28 08:56:16,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:56:16,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 08:56:16,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:56:16,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 08:56:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-01-28 08:56:16,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:56:16,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 475 transitions, 13364 flow. Second operand has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 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) [2023-01-28 08:56:16,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:56:16,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:56:16,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:56:17,449 INFO L130 PetriNetUnfolder]: 2217/3903 cut-off events. [2023-01-28 08:56:17,449 INFO L131 PetriNetUnfolder]: For 173183/173183 co-relation queries the response was YES. [2023-01-28 08:56:17,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50988 conditions, 3903 events. 2217/3903 cut-off events. For 173183/173183 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 25767 event pairs, 378 based on Foata normal form. 8/3911 useless extension candidates. Maximal degree in co-relation 50816. Up to 2009 conditions per place. [2023-01-28 08:56:17,486 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 254 selfloop transitions, 294 changer transitions 2/550 dead transitions. [2023-01-28 08:56:17,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 550 transitions, 16009 flow [2023-01-28 08:56:17,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 08:56:17,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 08:56:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2350 transitions. [2023-01-28 08:56:17,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34326614081215306 [2023-01-28 08:56:17,488 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2350 transitions. [2023-01-28 08:56:17,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2350 transitions. [2023-01-28 08:56:17,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:56:17,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2350 transitions. [2023-01-28 08:56:17,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 167.85714285714286) internal successors, (2350), 14 states have internal predecessors, (2350), 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) [2023-01-28 08:56:17,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:56:17,492 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:56:17,492 INFO L175 Difference]: Start difference. First operand has 332 places, 475 transitions, 13364 flow. Second operand 14 states and 2350 transitions. [2023-01-28 08:56:17,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 550 transitions, 16009 flow [2023-01-28 08:56:17,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 550 transitions, 15822 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-01-28 08:56:17,946 INFO L231 Difference]: Finished difference. Result has 335 places, 493 transitions, 14514 flow [2023-01-28 08:56:17,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=13189, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14514, PETRI_PLACES=335, PETRI_TRANSITIONS=493} [2023-01-28 08:56:17,946 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 312 predicate places. [2023-01-28 08:56:17,947 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 493 transitions, 14514 flow [2023-01-28 08:56:17,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.1578947368421) internal successors, (3138), 19 states have internal predecessors, (3138), 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) [2023-01-28 08:56:17,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:56:17,947 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:56:17,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-28 08:56:18,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-01-28 08:56:18,154 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:56:18,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:56:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2064674063, now seen corresponding path program 37 times [2023-01-28 08:56:18,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:56:18,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819842360] [2023-01-28 08:56:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:56:18,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:56:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:18,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:56:18,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819842360] [2023-01-28 08:56:18,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819842360] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:56:18,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139699970] [2023-01-28 08:56:18,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 08:56:18,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:18,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:56:18,583 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:56:18,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-28 08:56:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:18,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:56:18,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:56:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:18,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:56:19,085 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:56:19,085 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 70 treesize of output 70 [2023-01-28 08:56:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:19,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139699970] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:56:19,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:56:19,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-01-28 08:56:19,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086950287] [2023-01-28 08:56:19,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:56:19,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 08:56:19,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:56:19,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 08:56:19,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-01-28 08:56:19,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:56:19,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 493 transitions, 14514 flow. Second operand has 18 states, 18 states have (on average 165.22222222222223) internal successors, (2974), 18 states have internal predecessors, (2974), 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) [2023-01-28 08:56:19,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:56:19,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:56:19,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:56:20,584 INFO L130 PetriNetUnfolder]: 2295/4035 cut-off events. [2023-01-28 08:56:20,584 INFO L131 PetriNetUnfolder]: For 187867/187867 co-relation queries the response was YES. [2023-01-28 08:56:20,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54498 conditions, 4035 events. 2295/4035 cut-off events. For 187867/187867 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 26761 event pairs, 72 based on Foata normal form. 8/4043 useless extension candidates. Maximal degree in co-relation 54324. Up to 1396 conditions per place. [2023-01-28 08:56:20,628 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 164 selfloop transitions, 414 changer transitions 4/582 dead transitions. [2023-01-28 08:56:20,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 582 transitions, 17611 flow [2023-01-28 08:56:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 08:56:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 08:56:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2192 transitions. [2023-01-28 08:56:20,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34481673745477426 [2023-01-28 08:56:20,630 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2192 transitions. [2023-01-28 08:56:20,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2192 transitions. [2023-01-28 08:56:20,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:56:20,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2192 transitions. [2023-01-28 08:56:20,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 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) [2023-01-28 08:56:20,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 08:56:20,634 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 08:56:20,634 INFO L175 Difference]: Start difference. First operand has 335 places, 493 transitions, 14514 flow. Second operand 13 states and 2192 transitions. [2023-01-28 08:56:20,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 582 transitions, 17611 flow [2023-01-28 08:56:21,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 582 transitions, 17519 flow, removed 23 selfloop flow, removed 7 redundant places. [2023-01-28 08:56:21,364 INFO L231 Difference]: Finished difference. Result has 341 places, 524 transitions, 16398 flow [2023-01-28 08:56:21,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=14422, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16398, PETRI_PLACES=341, PETRI_TRANSITIONS=524} [2023-01-28 08:56:21,365 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 318 predicate places. [2023-01-28 08:56:21,365 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 524 transitions, 16398 flow [2023-01-28 08:56:21,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 165.22222222222223) internal successors, (2974), 18 states have internal predecessors, (2974), 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) [2023-01-28 08:56:21,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:56:21,365 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:56:21,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-01-28 08:56:21,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-01-28 08:56:21,566 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:56:21,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:56:21,566 INFO L85 PathProgramCache]: Analyzing trace with hash -608499983, now seen corresponding path program 38 times [2023-01-28 08:56:21,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:56:21,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460620240] [2023-01-28 08:56:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:56:21,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:56:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:22,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:56:22,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460620240] [2023-01-28 08:56:22,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460620240] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:56:22,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847768138] [2023-01-28 08:56:22,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:56:22,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:22,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:56:22,076 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:56:22,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-28 08:56:22,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:56:22,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:56:22,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-28 08:56:22,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:56:22,520 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:56:22,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:56:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:22,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:56:22,895 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:56:22,896 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 70 treesize of output 70 [2023-01-28 08:56:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:22,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847768138] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:56:22,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:56:22,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 25 [2023-01-28 08:56:22,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270306901] [2023-01-28 08:56:22,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:56:22,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 08:56:22,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:56:22,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 08:56:22,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2023-01-28 08:56:22,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-28 08:56:22,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 524 transitions, 16398 flow. Second operand has 25 states, 25 states have (on average 161.96) internal successors, (4049), 25 states have internal predecessors, (4049), 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) [2023-01-28 08:56:22,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:56:22,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-28 08:56:22,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:56:25,357 INFO L130 PetriNetUnfolder]: 2523/4495 cut-off events. [2023-01-28 08:56:25,357 INFO L131 PetriNetUnfolder]: For 230343/230343 co-relation queries the response was YES. [2023-01-28 08:56:25,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63364 conditions, 4495 events. 2523/4495 cut-off events. For 230343/230343 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 31015 event pairs, 31 based on Foata normal form. 20/4515 useless extension candidates. Maximal degree in co-relation 63190. Up to 1704 conditions per place. [2023-01-28 08:56:25,410 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 220 selfloop transitions, 454 changer transitions 8/682 dead transitions. [2023-01-28 08:56:25,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 682 transitions, 21595 flow [2023-01-28 08:56:25,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 08:56:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 08:56:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4620 transitions. [2023-01-28 08:56:25,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3374233128834356 [2023-01-28 08:56:25,413 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4620 transitions. [2023-01-28 08:56:25,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4620 transitions. [2023-01-28 08:56:25,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:56:25,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4620 transitions. [2023-01-28 08:56:25,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 165.0) internal successors, (4620), 28 states have internal predecessors, (4620), 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) [2023-01-28 08:56:25,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 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) [2023-01-28 08:56:25,425 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 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) [2023-01-28 08:56:25,426 INFO L175 Difference]: Start difference. First operand has 341 places, 524 transitions, 16398 flow. Second operand 28 states and 4620 transitions. [2023-01-28 08:56:25,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 682 transitions, 21595 flow [2023-01-28 08:56:26,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 682 transitions, 21157 flow, removed 120 selfloop flow, removed 6 redundant places. [2023-01-28 08:56:26,308 INFO L231 Difference]: Finished difference. Result has 369 places, 598 transitions, 20076 flow [2023-01-28 08:56:26,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=16040, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=20076, PETRI_PLACES=369, PETRI_TRANSITIONS=598} [2023-01-28 08:56:26,309 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 346 predicate places. [2023-01-28 08:56:26,309 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 598 transitions, 20076 flow [2023-01-28 08:56:26,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 161.96) internal successors, (4049), 25 states have internal predecessors, (4049), 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) [2023-01-28 08:56:26,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:56:26,310 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:56:26,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-01-28 08:56:26,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:26,510 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:56:26,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:56:26,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1641094237, now seen corresponding path program 39 times [2023-01-28 08:56:26,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:56:26,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817842779] [2023-01-28 08:56:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:56:26,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:56:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:27,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:56:27,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817842779] [2023-01-28 08:56:27,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817842779] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:56:27,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930689118] [2023-01-28 08:56:27,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 08:56:27,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:27,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:56:27,009 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:56:27,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-28 08:56:27,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 08:56:27,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:56:27,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-28 08:56:27,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:56:27,463 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:56:27,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:56:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:27,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:56:27,858 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:56:27,859 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 70 treesize of output 70 [2023-01-28 08:56:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:27,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930689118] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:56:27,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:56:27,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 25 [2023-01-28 08:56:27,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531786670] [2023-01-28 08:56:27,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:56:27,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 08:56:27,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:56:27,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 08:56:27,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-01-28 08:56:27,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-28 08:56:27,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 598 transitions, 20076 flow. Second operand has 25 states, 25 states have (on average 161.96) internal successors, (4049), 25 states have internal predecessors, (4049), 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) [2023-01-28 08:56:27,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:56:27,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-28 08:56:27,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:56:30,617 INFO L130 PetriNetUnfolder]: 2701/4813 cut-off events. [2023-01-28 08:56:30,617 INFO L131 PetriNetUnfolder]: For 261193/261193 co-relation queries the response was YES. [2023-01-28 08:56:30,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71114 conditions, 4813 events. 2701/4813 cut-off events. For 261193/261193 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 33617 event pairs, 25 based on Foata normal form. 20/4833 useless extension candidates. Maximal degree in co-relation 70934. Up to 1892 conditions per place. [2023-01-28 08:56:30,676 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 222 selfloop transitions, 472 changer transitions 7/701 dead transitions. [2023-01-28 08:56:30,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 701 transitions, 23648 flow [2023-01-28 08:56:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 08:56:30,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 08:56:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4288 transitions. [2023-01-28 08:56:30,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33726600597766243 [2023-01-28 08:56:30,679 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4288 transitions. [2023-01-28 08:56:30,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4288 transitions. [2023-01-28 08:56:30,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:56:30,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4288 transitions. [2023-01-28 08:56:30,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 164.92307692307693) internal successors, (4288), 26 states have internal predecessors, (4288), 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) [2023-01-28 08:56:30,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 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) [2023-01-28 08:56:30,689 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 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) [2023-01-28 08:56:30,689 INFO L175 Difference]: Start difference. First operand has 369 places, 598 transitions, 20076 flow. Second operand 26 states and 4288 transitions. [2023-01-28 08:56:30,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 701 transitions, 23648 flow [2023-01-28 08:56:31,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 701 transitions, 23144 flow, removed 133 selfloop flow, removed 11 redundant places. [2023-01-28 08:56:31,663 INFO L231 Difference]: Finished difference. Result has 389 places, 626 transitions, 22159 flow [2023-01-28 08:56:31,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=19616, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=22159, PETRI_PLACES=389, PETRI_TRANSITIONS=626} [2023-01-28 08:56:31,664 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 366 predicate places. [2023-01-28 08:56:31,664 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 626 transitions, 22159 flow [2023-01-28 08:56:31,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 161.96) internal successors, (4049), 25 states have internal predecessors, (4049), 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) [2023-01-28 08:56:31,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:56:31,665 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:56:31,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-01-28 08:56:31,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-01-28 08:56:31,882 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:56:31,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:56:31,882 INFO L85 PathProgramCache]: Analyzing trace with hash 185359705, now seen corresponding path program 40 times [2023-01-28 08:56:31,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:56:31,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858423671] [2023-01-28 08:56:31,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:56:31,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:56:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:32,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:56:32,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858423671] [2023-01-28 08:56:32,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858423671] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:56:32,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046509370] [2023-01-28 08:56:32,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 08:56:32,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:32,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:56:32,539 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:56:32,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-28 08:56:32,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 08:56:32,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:56:32,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 53 conjunts are in the unsatisfiable core [2023-01-28 08:56:32,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:56:32,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:56:32,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 08:56:33,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:56:33,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 08:56:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:33,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:56:33,274 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3183 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3183))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (not (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse0 c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_3183 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3183))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))))) is different from false [2023-01-28 08:56:33,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:56:33,310 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 116 treesize of output 144 [2023-01-28 08:56:33,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:56:33,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-01-28 08:56:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:33,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046509370] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:56:33,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:56:33,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-01-28 08:56:33,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998036631] [2023-01-28 08:56:33,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:56:33,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 08:56:33,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:56:33,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 08:56:33,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=651, Unknown=1, NotChecked=52, Total=812 [2023-01-28 08:56:33,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-01-28 08:56:33,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 626 transitions, 22159 flow. Second operand has 29 states, 29 states have (on average 160.79310344827587) internal successors, (4663), 29 states have internal predecessors, (4663), 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) [2023-01-28 08:56:33,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:56:33,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-01-28 08:56:33,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:56:36,017 INFO L130 PetriNetUnfolder]: 2905/5185 cut-off events. [2023-01-28 08:56:36,017 INFO L131 PetriNetUnfolder]: For 299731/299731 co-relation queries the response was YES. [2023-01-28 08:56:36,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78952 conditions, 5185 events. 2905/5185 cut-off events. For 299731/299731 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 36573 event pairs, 260 based on Foata normal form. 8/5193 useless extension candidates. Maximal degree in co-relation 78770. Up to 1840 conditions per place. [2023-01-28 08:56:36,078 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 330 selfloop transitions, 394 changer transitions 2/726 dead transitions. [2023-01-28 08:56:36,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 726 transitions, 26107 flow [2023-01-28 08:56:36,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 08:56:36,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 08:56:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2477 transitions. [2023-01-28 08:56:36,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3376959781867757 [2023-01-28 08:56:36,081 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2477 transitions. [2023-01-28 08:56:36,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2477 transitions. [2023-01-28 08:56:36,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:56:36,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2477 transitions. [2023-01-28 08:56:36,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 165.13333333333333) internal successors, (2477), 15 states have internal predecessors, (2477), 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) [2023-01-28 08:56:36,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:56:36,087 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:56:36,087 INFO L175 Difference]: Start difference. First operand has 389 places, 626 transitions, 22159 flow. Second operand 15 states and 2477 transitions. [2023-01-28 08:56:36,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 726 transitions, 26107 flow [2023-01-28 08:56:37,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 726 transitions, 25220 flow, removed 89 selfloop flow, removed 13 redundant places. [2023-01-28 08:56:37,283 INFO L231 Difference]: Finished difference. Result has 396 places, 664 transitions, 23965 flow [2023-01-28 08:56:37,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=21363, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=23965, PETRI_PLACES=396, PETRI_TRANSITIONS=664} [2023-01-28 08:56:37,284 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 373 predicate places. [2023-01-28 08:56:37,284 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 664 transitions, 23965 flow [2023-01-28 08:56:37,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 160.79310344827587) internal successors, (4663), 29 states have internal predecessors, (4663), 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) [2023-01-28 08:56:37,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:56:37,285 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:56:37,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-01-28 08:56:37,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-01-28 08:56:37,492 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:56:37,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:56:37,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1816861323, now seen corresponding path program 41 times [2023-01-28 08:56:37,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:56:37,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422740522] [2023-01-28 08:56:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:56:37,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:56:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:38,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:56:38,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422740522] [2023-01-28 08:56:38,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422740522] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:56:38,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142967820] [2023-01-28 08:56:38,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 08:56:38,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:38,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:56:38,234 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:56:38,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-28 08:56:38,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 08:56:38,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:56:38,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-28 08:56:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:56:38,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:56:38,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:56:38,747 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:56:38,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2023-01-28 08:56:38,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:56:38,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-01-28 08:56:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:38,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:56:39,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:56:39,139 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 94 treesize of output 130 [2023-01-28 08:56:39,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:56:39,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-28 08:56:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:39,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142967820] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:56:39,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:56:39,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-28 08:56:39,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311272647] [2023-01-28 08:56:39,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:56:39,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 08:56:39,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:56:39,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 08:56:39,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=861, Unknown=4, NotChecked=0, Total=992 [2023-01-28 08:56:39,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 489 [2023-01-28 08:56:39,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 664 transitions, 23965 flow. Second operand has 32 states, 32 states have (on average 156.65625) internal successors, (5013), 32 states have internal predecessors, (5013), 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) [2023-01-28 08:56:39,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:56:39,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 489 [2023-01-28 08:56:39,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:56:42,574 INFO L130 PetriNetUnfolder]: 2897/5177 cut-off events. [2023-01-28 08:56:42,575 INFO L131 PetriNetUnfolder]: For 320013/320013 co-relation queries the response was YES. [2023-01-28 08:56:42,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80323 conditions, 5177 events. 2897/5177 cut-off events. For 320013/320013 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 36642 event pairs, 160 based on Foata normal form. 8/5185 useless extension candidates. Maximal degree in co-relation 80134. Up to 1812 conditions per place. [2023-01-28 08:56:42,637 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 317 selfloop transitions, 418 changer transitions 10/745 dead transitions. [2023-01-28 08:56:42,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 745 transitions, 26921 flow [2023-01-28 08:56:42,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 08:56:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 08:56:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2418 transitions. [2023-01-28 08:56:42,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296523517382413 [2023-01-28 08:56:42,640 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2418 transitions. [2023-01-28 08:56:42,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2418 transitions. [2023-01-28 08:56:42,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:56:42,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2418 transitions. [2023-01-28 08:56:42,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 161.2) internal successors, (2418), 15 states have internal predecessors, (2418), 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) [2023-01-28 08:56:42,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:56:42,646 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:56:42,646 INFO L175 Difference]: Start difference. First operand has 396 places, 664 transitions, 23965 flow. Second operand 15 states and 2418 transitions. [2023-01-28 08:56:42,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 745 transitions, 26921 flow [2023-01-28 08:56:43,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 745 transitions, 26643 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-01-28 08:56:43,958 INFO L231 Difference]: Finished difference. Result has 405 places, 669 transitions, 24943 flow [2023-01-28 08:56:43,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=23692, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=24943, PETRI_PLACES=405, PETRI_TRANSITIONS=669} [2023-01-28 08:56:43,959 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 382 predicate places. [2023-01-28 08:56:43,959 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 669 transitions, 24943 flow [2023-01-28 08:56:43,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.65625) internal successors, (5013), 32 states have internal predecessors, (5013), 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) [2023-01-28 08:56:43,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:56:43,960 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:56:43,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-28 08:56:44,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-28 08:56:44,165 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:56:44,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:56:44,165 INFO L85 PathProgramCache]: Analyzing trace with hash -200288663, now seen corresponding path program 42 times [2023-01-28 08:56:44,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:56:44,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066741063] [2023-01-28 08:56:44,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:56:44,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:56:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:44,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:56:44,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066741063] [2023-01-28 08:56:44,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066741063] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:56:44,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058794507] [2023-01-28 08:56:44,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 08:56:44,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:44,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:56:44,816 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:56:44,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-28 08:56:45,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 08:56:45,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:56:45,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 66 conjunts are in the unsatisfiable core [2023-01-28 08:56:45,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:56:45,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:56:45,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 08:56:45,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:56:45,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 08:56:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:45,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:56:45,687 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3325 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3325))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_3325 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3325))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))))) is different from false [2023-01-28 08:56:45,697 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:56:45,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-01-28 08:56:45,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:56:45,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-28 08:56:45,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:56:45,752 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 116 treesize of output 144 [2023-01-28 08:56:45,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:56:45,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-01-28 08:56:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:46,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058794507] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:56:46,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:56:46,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-28 08:56:46,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040451292] [2023-01-28 08:56:46,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:56:46,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 08:56:46,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:56:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 08:56:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=819, Unknown=1, NotChecked=58, Total=992 [2023-01-28 08:56:46,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-01-28 08:56:46,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 669 transitions, 24943 flow. Second operand has 32 states, 32 states have (on average 157.8125) internal successors, (5050), 32 states have internal predecessors, (5050), 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) [2023-01-28 08:56:46,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:56:46,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-01-28 08:56:46,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:56:49,674 INFO L130 PetriNetUnfolder]: 2899/5213 cut-off events. [2023-01-28 08:56:49,675 INFO L131 PetriNetUnfolder]: For 342172/342172 co-relation queries the response was YES. [2023-01-28 08:56:49,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82364 conditions, 5213 events. 2899/5213 cut-off events. For 342172/342172 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 37078 event pairs, 206 based on Foata normal form. 34/5247 useless extension candidates. Maximal degree in co-relation 82174. Up to 1804 conditions per place. [2023-01-28 08:56:49,736 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 330 selfloop transitions, 425 changer transitions 12/767 dead transitions. [2023-01-28 08:56:49,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 767 transitions, 27835 flow [2023-01-28 08:56:49,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 08:56:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 08:56:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5155 transitions. [2023-01-28 08:56:49,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32943507157464214 [2023-01-28 08:56:49,739 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5155 transitions. [2023-01-28 08:56:49,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5155 transitions. [2023-01-28 08:56:49,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:56:49,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5155 transitions. [2023-01-28 08:56:49,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 161.09375) internal successors, (5155), 32 states have internal predecessors, (5155), 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) [2023-01-28 08:56:49,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 489.0) internal successors, (16137), 33 states have internal predecessors, (16137), 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) [2023-01-28 08:56:49,750 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 489.0) internal successors, (16137), 33 states have internal predecessors, (16137), 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) [2023-01-28 08:56:49,750 INFO L175 Difference]: Start difference. First operand has 405 places, 669 transitions, 24943 flow. Second operand 32 states and 5155 transitions. [2023-01-28 08:56:49,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 767 transitions, 27835 flow [2023-01-28 08:56:51,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 767 transitions, 27141 flow, removed 25 selfloop flow, removed 8 redundant places. [2023-01-28 08:56:51,235 INFO L231 Difference]: Finished difference. Result has 434 places, 676 transitions, 25411 flow [2023-01-28 08:56:51,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=23900, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=25411, PETRI_PLACES=434, PETRI_TRANSITIONS=676} [2023-01-28 08:56:51,236 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 411 predicate places. [2023-01-28 08:56:51,236 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 676 transitions, 25411 flow [2023-01-28 08:56:51,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 157.8125) internal successors, (5050), 32 states have internal predecessors, (5050), 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) [2023-01-28 08:56:51,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:56:51,236 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:56:51,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-01-28 08:56:51,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:51,437 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:56:51,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:56:51,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1277559199, now seen corresponding path program 43 times [2023-01-28 08:56:51,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:56:51,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552043877] [2023-01-28 08:56:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:56:51,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:56:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:51,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:56:51,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552043877] [2023-01-28 08:56:51,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552043877] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:56:51,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31551494] [2023-01-28 08:56:51,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 08:56:51,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:51,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:56:51,929 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:56:51,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-28 08:56:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:52,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:56:52,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:56:52,332 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:56:52,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 08:56:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:52,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:56:52,566 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:56:52,566 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 40 treesize of output 56 [2023-01-28 08:56:52,583 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:56:52,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 08:56:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:52,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31551494] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:56:52,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:56:52,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-28 08:56:52,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676589204] [2023-01-28 08:56:52,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:56:52,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 08:56:52,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:56:52,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 08:56:52,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-01-28 08:56:52,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:56:52,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 676 transitions, 25411 flow. Second operand has 19 states, 19 states have (on average 165.10526315789474) internal successors, (3137), 19 states have internal predecessors, (3137), 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) [2023-01-28 08:56:52,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:56:52,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:56:52,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:56:54,647 INFO L130 PetriNetUnfolder]: 2937/5287 cut-off events. [2023-01-28 08:56:54,647 INFO L131 PetriNetUnfolder]: For 348252/348252 co-relation queries the response was YES. [2023-01-28 08:56:54,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84988 conditions, 5287 events. 2937/5287 cut-off events. For 348252/348252 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 37731 event pairs, 515 based on Foata normal form. 8/5295 useless extension candidates. Maximal degree in co-relation 84790. Up to 2695 conditions per place. [2023-01-28 08:56:54,725 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 293 selfloop transitions, 433 changer transitions 3/729 dead transitions. [2023-01-28 08:56:54,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 729 transitions, 27827 flow [2023-01-28 08:56:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 08:56:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 08:56:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2192 transitions. [2023-01-28 08:56:54,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34481673745477426 [2023-01-28 08:56:54,727 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2192 transitions. [2023-01-28 08:56:54,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2192 transitions. [2023-01-28 08:56:54,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:56:54,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2192 transitions. [2023-01-28 08:56:54,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 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) [2023-01-28 08:56:54,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 08:56:54,731 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 08:56:54,731 INFO L175 Difference]: Start difference. First operand has 434 places, 676 transitions, 25411 flow. Second operand 13 states and 2192 transitions. [2023-01-28 08:56:54,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 729 transitions, 27827 flow [2023-01-28 08:56:56,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 729 transitions, 27161 flow, removed 114 selfloop flow, removed 13 redundant places. [2023-01-28 08:56:56,346 INFO L231 Difference]: Finished difference. Result has 435 places, 681 transitions, 26277 flow [2023-01-28 08:56:56,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=24762, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=26277, PETRI_PLACES=435, PETRI_TRANSITIONS=681} [2023-01-28 08:56:56,347 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 412 predicate places. [2023-01-28 08:56:56,347 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 681 transitions, 26277 flow [2023-01-28 08:56:56,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.10526315789474) internal successors, (3137), 19 states have internal predecessors, (3137), 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) [2023-01-28 08:56:56,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:56:56,348 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:56:56,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-01-28 08:56:56,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:56,548 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:56:56,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:56:56,549 INFO L85 PathProgramCache]: Analyzing trace with hash -6719081, now seen corresponding path program 44 times [2023-01-28 08:56:56,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:56:56,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535868773] [2023-01-28 08:56:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:56:56,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:56:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:56:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:57,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:56:57,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535868773] [2023-01-28 08:56:57,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535868773] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:56:57,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484896357] [2023-01-28 08:56:57,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:56:57,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:56:57,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:56:57,084 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:56:57,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-28 08:56:57,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:56:57,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:56:57,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:56:57,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:56:57,452 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:56:57,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 08:56:57,460 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:56:57,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:56:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:57,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:56:57,665 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-28 08:56:57,665 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 82 treesize of output 99 [2023-01-28 08:56:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:56:57,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484896357] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:56:57,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:56:57,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 08:56:57,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575252720] [2023-01-28 08:56:57,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:56:57,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 08:56:57,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:56:57,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 08:56:57,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-01-28 08:56:57,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:56:57,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 681 transitions, 26277 flow. Second operand has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 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) [2023-01-28 08:56:57,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:56:57,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:56:57,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:57:00,431 INFO L130 PetriNetUnfolder]: 3041/5479 cut-off events. [2023-01-28 08:57:00,431 INFO L131 PetriNetUnfolder]: For 382797/382797 co-relation queries the response was YES. [2023-01-28 08:57:00,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89687 conditions, 5479 events. 3041/5479 cut-off events. For 382797/382797 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 39380 event pairs, 522 based on Foata normal form. 8/5487 useless extension candidates. Maximal degree in co-relation 89488. Up to 2729 conditions per place. [2023-01-28 08:57:00,508 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 313 selfloop transitions, 447 changer transitions 4/764 dead transitions. [2023-01-28 08:57:00,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 764 transitions, 29460 flow [2023-01-28 08:57:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 08:57:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 08:57:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3528 transitions. [2023-01-28 08:57:00,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34355828220858897 [2023-01-28 08:57:00,510 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3528 transitions. [2023-01-28 08:57:00,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3528 transitions. [2023-01-28 08:57:00,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:57:00,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3528 transitions. [2023-01-28 08:57:00,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 168.0) internal successors, (3528), 21 states have internal predecessors, (3528), 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) [2023-01-28 08:57:00,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 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) [2023-01-28 08:57:00,516 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 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) [2023-01-28 08:57:00,516 INFO L175 Difference]: Start difference. First operand has 435 places, 681 transitions, 26277 flow. Second operand 21 states and 3528 transitions. [2023-01-28 08:57:00,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 764 transitions, 29460 flow [2023-01-28 08:57:02,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 764 transitions, 29264 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-01-28 08:57:02,087 INFO L231 Difference]: Finished difference. Result has 453 places, 695 transitions, 27776 flow [2023-01-28 08:57:02,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=26081, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=27776, PETRI_PLACES=453, PETRI_TRANSITIONS=695} [2023-01-28 08:57:02,088 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 430 predicate places. [2023-01-28 08:57:02,088 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 695 transitions, 27776 flow [2023-01-28 08:57:02,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 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) [2023-01-28 08:57:02,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:57:02,088 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:57:02,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-01-28 08:57:02,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:57:02,289 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:57:02,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:57:02,289 INFO L85 PathProgramCache]: Analyzing trace with hash -449093979, now seen corresponding path program 45 times [2023-01-28 08:57:02,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:57:02,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126974845] [2023-01-28 08:57:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:57:02,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:57:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:57:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:02,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:57:02,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126974845] [2023-01-28 08:57:02,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126974845] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:57:02,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990593770] [2023-01-28 08:57:02,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 08:57:02,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:57:02,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:57:02,765 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:57:02,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-28 08:57:03,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 08:57:03,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:57:03,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 08:57:03,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:57:03,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:57:03,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-01-28 08:57:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:03,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:57:03,412 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:57:03,412 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 70 treesize of output 70 [2023-01-28 08:57:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:03,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990593770] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:57:03,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:57:03,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-28 08:57:03,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507288082] [2023-01-28 08:57:03,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:57:03,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 08:57:03,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:57:03,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 08:57:03,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-01-28 08:57:03,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:57:03,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 695 transitions, 27776 flow. Second operand has 22 states, 22 states have (on average 165.04545454545453) internal successors, (3631), 22 states have internal predecessors, (3631), 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) [2023-01-28 08:57:03,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:57:03,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:57:03,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:57:05,995 INFO L130 PetriNetUnfolder]: 3081/5563 cut-off events. [2023-01-28 08:57:05,995 INFO L131 PetriNetUnfolder]: For 416128/416128 co-relation queries the response was YES. [2023-01-28 08:57:06,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93899 conditions, 5563 events. 3081/5563 cut-off events. For 416128/416128 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 40197 event pairs, 108 based on Foata normal form. 16/5579 useless extension candidates. Maximal degree in co-relation 93696. Up to 1932 conditions per place. [2023-01-28 08:57:06,076 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 259 selfloop transitions, 505 changer transitions 9/773 dead transitions. [2023-01-28 08:57:06,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 773 transitions, 30866 flow [2023-01-28 08:57:06,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 08:57:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 08:57:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3038 transitions. [2023-01-28 08:57:06,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3451488298114065 [2023-01-28 08:57:06,079 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3038 transitions. [2023-01-28 08:57:06,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3038 transitions. [2023-01-28 08:57:06,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:57:06,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3038 transitions. [2023-01-28 08:57:06,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 168.77777777777777) internal successors, (3038), 18 states have internal predecessors, (3038), 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) [2023-01-28 08:57:06,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 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) [2023-01-28 08:57:06,084 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 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) [2023-01-28 08:57:06,084 INFO L175 Difference]: Start difference. First operand has 453 places, 695 transitions, 27776 flow. Second operand 18 states and 3038 transitions. [2023-01-28 08:57:06,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 773 transitions, 30866 flow [2023-01-28 08:57:07,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 773 transitions, 30575 flow, removed 61 selfloop flow, removed 10 redundant places. [2023-01-28 08:57:07,949 INFO L231 Difference]: Finished difference. Result has 465 places, 705 transitions, 29471 flow [2023-01-28 08:57:07,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=27485, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=29471, PETRI_PLACES=465, PETRI_TRANSITIONS=705} [2023-01-28 08:57:07,950 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 442 predicate places. [2023-01-28 08:57:07,950 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 705 transitions, 29471 flow [2023-01-28 08:57:07,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 165.04545454545453) internal successors, (3631), 22 states have internal predecessors, (3631), 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) [2023-01-28 08:57:07,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:57:07,951 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:57:07,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-28 08:57:08,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-01-28 08:57:08,151 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:57:08,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:57:08,152 INFO L85 PathProgramCache]: Analyzing trace with hash -786034555, now seen corresponding path program 46 times [2023-01-28 08:57:08,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:57:08,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87296778] [2023-01-28 08:57:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:57:08,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:57:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:57:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:08,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:57:08,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87296778] [2023-01-28 08:57:08,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87296778] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:57:08,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43299852] [2023-01-28 08:57:08,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 08:57:08,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:57:08,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:57:08,580 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:57:08,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-28 08:57:08,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 08:57:08,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:57:08,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:57:08,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:57:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:08,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:57:09,086 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:57:09,087 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 40 treesize of output 56 [2023-01-28 08:57:09,100 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:57:09,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 08:57:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:09,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43299852] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:57:09,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:57:09,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-01-28 08:57:09,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331886151] [2023-01-28 08:57:09,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:57:09,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 08:57:09,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:57:09,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 08:57:09,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-01-28 08:57:09,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:57:09,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 705 transitions, 29471 flow. Second operand has 18 states, 18 states have (on average 165.22222222222223) internal successors, (2974), 18 states have internal predecessors, (2974), 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) [2023-01-28 08:57:09,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:57:09,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:57:09,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:57:11,238 INFO L130 PetriNetUnfolder]: 3103/5581 cut-off events. [2023-01-28 08:57:11,239 INFO L131 PetriNetUnfolder]: For 460823/460823 co-relation queries the response was YES. [2023-01-28 08:57:11,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97363 conditions, 5581 events. 3103/5581 cut-off events. For 460823/460823 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 40176 event pairs, 585 based on Foata normal form. 8/5589 useless extension candidates. Maximal degree in co-relation 97152. Up to 2981 conditions per place. [2023-01-28 08:57:11,318 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 301 selfloop transitions, 441 changer transitions 2/744 dead transitions. [2023-01-28 08:57:11,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 744 transitions, 31746 flow [2023-01-28 08:57:11,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 08:57:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 08:57:11,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1849 transitions. [2023-01-28 08:57:11,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34374419036995724 [2023-01-28 08:57:11,320 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1849 transitions. [2023-01-28 08:57:11,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1849 transitions. [2023-01-28 08:57:11,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:57:11,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1849 transitions. [2023-01-28 08:57:11,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.0909090909091) internal successors, (1849), 11 states have internal predecessors, (1849), 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) [2023-01-28 08:57:11,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 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) [2023-01-28 08:57:11,323 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 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) [2023-01-28 08:57:11,323 INFO L175 Difference]: Start difference. First operand has 465 places, 705 transitions, 29471 flow. Second operand 11 states and 1849 transitions. [2023-01-28 08:57:11,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 744 transitions, 31746 flow [2023-01-28 08:57:13,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 744 transitions, 31392 flow, removed 50 selfloop flow, removed 10 redundant places. [2023-01-28 08:57:13,449 INFO L231 Difference]: Finished difference. Result has 466 places, 708 transitions, 30577 flow [2023-01-28 08:57:13,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=29121, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=438, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=30577, PETRI_PLACES=466, PETRI_TRANSITIONS=708} [2023-01-28 08:57:13,450 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 443 predicate places. [2023-01-28 08:57:13,450 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 708 transitions, 30577 flow [2023-01-28 08:57:13,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 165.22222222222223) internal successors, (2974), 18 states have internal predecessors, (2974), 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) [2023-01-28 08:57:13,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:57:13,450 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:57:13,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-01-28 08:57:13,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-01-28 08:57:13,651 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:57:13,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:57:13,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1418744525, now seen corresponding path program 47 times [2023-01-28 08:57:13,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:57:13,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801051922] [2023-01-28 08:57:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:57:13,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:57:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:57:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:14,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:57:14,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801051922] [2023-01-28 08:57:14,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801051922] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:57:14,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876313818] [2023-01-28 08:57:14,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 08:57:14,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:57:14,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:57:14,124 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:57:14,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-28 08:57:14,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 08:57:14,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:57:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:57:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:57:14,489 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:57:14,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 08:57:14,497 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:57:14,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:57:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:14,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:57:14,699 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:57:14,700 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 40 treesize of output 56 [2023-01-28 08:57:14,715 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:57:14,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 08:57:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:14,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876313818] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:57:14,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:57:14,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 08:57:14,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023588554] [2023-01-28 08:57:14,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:57:14,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 08:57:14,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:57:14,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 08:57:14,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-01-28 08:57:14,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:57:14,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 708 transitions, 30577 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 08:57:14,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:57:14,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:57:14,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:57:17,230 INFO L130 PetriNetUnfolder]: 3111/5605 cut-off events. [2023-01-28 08:57:17,230 INFO L131 PetriNetUnfolder]: For 486868/486868 co-relation queries the response was YES. [2023-01-28 08:57:17,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100071 conditions, 5605 events. 3111/5605 cut-off events. For 486868/486868 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 40458 event pairs, 598 based on Foata normal form. 16/5621 useless extension candidates. Maximal degree in co-relation 99858. Up to 3141 conditions per place. [2023-01-28 08:57:17,306 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 351 selfloop transitions, 400 changer transitions 8/759 dead transitions. [2023-01-28 08:57:17,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 759 transitions, 33054 flow [2023-01-28 08:57:17,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 08:57:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 08:57:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2359 transitions. [2023-01-28 08:57:17,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445807770961145 [2023-01-28 08:57:17,308 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2359 transitions. [2023-01-28 08:57:17,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2359 transitions. [2023-01-28 08:57:17,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:57:17,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2359 transitions. [2023-01-28 08:57:17,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 168.5) internal successors, (2359), 14 states have internal predecessors, (2359), 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) [2023-01-28 08:57:17,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:57:17,313 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:57:17,313 INFO L175 Difference]: Start difference. First operand has 466 places, 708 transitions, 30577 flow. Second operand 14 states and 2359 transitions. [2023-01-28 08:57:17,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 759 transitions, 33054 flow [2023-01-28 08:57:19,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 759 transitions, 32888 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-01-28 08:57:19,229 INFO L231 Difference]: Finished difference. Result has 473 places, 710 transitions, 31372 flow [2023-01-28 08:57:19,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=30419, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=31372, PETRI_PLACES=473, PETRI_TRANSITIONS=710} [2023-01-28 08:57:19,230 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 450 predicate places. [2023-01-28 08:57:19,230 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 710 transitions, 31372 flow [2023-01-28 08:57:19,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 08:57:19,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:57:19,231 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:57:19,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-01-28 08:57:19,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-01-28 08:57:19,431 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:57:19,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:57:19,431 INFO L85 PathProgramCache]: Analyzing trace with hash -908165391, now seen corresponding path program 48 times [2023-01-28 08:57:19,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:57:19,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481627679] [2023-01-28 08:57:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:57:19,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:57:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:57:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:19,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:57:19,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481627679] [2023-01-28 08:57:19,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481627679] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:57:19,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816623612] [2023-01-28 08:57:19,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 08:57:19,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:57:19,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:57:19,848 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:57:19,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-28 08:57:20,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 08:57:20,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:57:20,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:57:20,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:57:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:20,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:57:20,415 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-28 08:57:20,416 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 82 treesize of output 99 [2023-01-28 08:57:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:20,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816623612] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:57:20,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:57:20,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-28 08:57:20,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390494097] [2023-01-28 08:57:20,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:57:20,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 08:57:20,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:57:20,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 08:57:20,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-01-28 08:57:20,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:57:20,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 710 transitions, 31372 flow. Second operand has 19 states, 19 states have (on average 165.21052631578948) internal successors, (3139), 19 states have internal predecessors, (3139), 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) [2023-01-28 08:57:20,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:57:20,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:57:20,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:57:23,064 INFO L130 PetriNetUnfolder]: 3157/5647 cut-off events. [2023-01-28 08:57:23,065 INFO L131 PetriNetUnfolder]: For 528343/528343 co-relation queries the response was YES. [2023-01-28 08:57:23,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103907 conditions, 5647 events. 3157/5647 cut-off events. For 528343/528343 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 40522 event pairs, 542 based on Foata normal form. 8/5655 useless extension candidates. Maximal degree in co-relation 103692. Up to 2879 conditions per place. [2023-01-28 08:57:23,146 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 310 selfloop transitions, 452 changer transitions 2/764 dead transitions. [2023-01-28 08:57:23,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 764 transitions, 34082 flow [2023-01-28 08:57:23,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 08:57:23,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 08:57:23,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2683 transitions. [2023-01-28 08:57:23,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3429192229038855 [2023-01-28 08:57:23,148 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2683 transitions. [2023-01-28 08:57:23,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2683 transitions. [2023-01-28 08:57:23,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:57:23,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2683 transitions. [2023-01-28 08:57:23,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 167.6875) internal successors, (2683), 16 states have internal predecessors, (2683), 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) [2023-01-28 08:57:23,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 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) [2023-01-28 08:57:23,153 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 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) [2023-01-28 08:57:23,153 INFO L175 Difference]: Start difference. First operand has 473 places, 710 transitions, 31372 flow. Second operand 16 states and 2683 transitions. [2023-01-28 08:57:23,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 764 transitions, 34082 flow [2023-01-28 08:57:25,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 764 transitions, 33573 flow, removed 46 selfloop flow, removed 32 redundant places. [2023-01-28 08:57:25,581 INFO L231 Difference]: Finished difference. Result has 455 places, 714 transitions, 32579 flow [2023-01-28 08:57:25,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=30804, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=32579, PETRI_PLACES=455, PETRI_TRANSITIONS=714} [2023-01-28 08:57:25,581 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 432 predicate places. [2023-01-28 08:57:25,582 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 714 transitions, 32579 flow [2023-01-28 08:57:25,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.21052631578948) internal successors, (3139), 19 states have internal predecessors, (3139), 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) [2023-01-28 08:57:25,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:57:25,582 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:57:25,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-01-28 08:57:25,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-01-28 08:57:25,783 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:57:25,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:57:25,783 INFO L85 PathProgramCache]: Analyzing trace with hash -837593193, now seen corresponding path program 49 times [2023-01-28 08:57:25,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:57:25,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9003997] [2023-01-28 08:57:25,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:57:25,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:57:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:57:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:26,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:57:26,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9003997] [2023-01-28 08:57:26,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9003997] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:57:26,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97351777] [2023-01-28 08:57:26,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 08:57:26,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:57:26,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:57:26,290 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:57:26,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-01-28 08:57:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:57:26,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:57:26,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:57:26,706 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:57:26,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 08:57:26,713 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:57:26,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:57:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:26,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:57:26,929 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:57:26,929 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 70 treesize of output 70 [2023-01-28 08:57:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:26,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97351777] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:57:26,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:57:26,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-01-28 08:57:26,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22814881] [2023-01-28 08:57:26,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:57:26,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 08:57:26,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:57:26,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 08:57:26,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-01-28 08:57:26,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:57:26,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 714 transitions, 32579 flow. Second operand has 21 states, 21 states have (on average 165.0952380952381) internal successors, (3467), 21 states have internal predecessors, (3467), 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) [2023-01-28 08:57:26,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:57:26,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:57:26,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:57:29,916 INFO L130 PetriNetUnfolder]: 3313/5895 cut-off events. [2023-01-28 08:57:29,916 INFO L131 PetriNetUnfolder]: For 566738/566738 co-relation queries the response was YES. [2023-01-28 08:57:29,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111441 conditions, 5895 events. 3313/5895 cut-off events. For 566738/566738 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 42355 event pairs, 107 based on Foata normal form. 8/5903 useless extension candidates. Maximal degree in co-relation 111248. Up to 2228 conditions per place. [2023-01-28 08:57:30,002 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 201 selfloop transitions, 595 changer transitions 3/799 dead transitions. [2023-01-28 08:57:30,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 799 transitions, 36387 flow [2023-01-28 08:57:30,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 08:57:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 08:57:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3194 transitions. [2023-01-28 08:57:30,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34377354429017326 [2023-01-28 08:57:30,004 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3194 transitions. [2023-01-28 08:57:30,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3194 transitions. [2023-01-28 08:57:30,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:57:30,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3194 transitions. [2023-01-28 08:57:30,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 168.10526315789474) internal successors, (3194), 19 states have internal predecessors, (3194), 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) [2023-01-28 08:57:30,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 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) [2023-01-28 08:57:30,010 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 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) [2023-01-28 08:57:30,010 INFO L175 Difference]: Start difference. First operand has 455 places, 714 transitions, 32579 flow. Second operand 19 states and 3194 transitions. [2023-01-28 08:57:30,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 799 transitions, 36387 flow [2023-01-28 08:57:32,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 799 transitions, 36104 flow, removed 13 selfloop flow, removed 16 redundant places. [2023-01-28 08:57:32,235 INFO L231 Difference]: Finished difference. Result has 458 places, 737 transitions, 35036 flow [2023-01-28 08:57:32,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=32273, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=35036, PETRI_PLACES=458, PETRI_TRANSITIONS=737} [2023-01-28 08:57:32,236 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 435 predicate places. [2023-01-28 08:57:32,236 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 737 transitions, 35036 flow [2023-01-28 08:57:32,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.0952380952381) internal successors, (3467), 21 states have internal predecessors, (3467), 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) [2023-01-28 08:57:32,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:57:32,237 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:57:32,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-01-28 08:57:32,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-01-28 08:57:32,437 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:57:32,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:57:32,438 INFO L85 PathProgramCache]: Analyzing trace with hash 167248611, now seen corresponding path program 50 times [2023-01-28 08:57:32,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:57:32,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624010255] [2023-01-28 08:57:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:57:32,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:57:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:57:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:32,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:57:32,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624010255] [2023-01-28 08:57:32,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624010255] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:57:32,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779339706] [2023-01-28 08:57:32,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:57:32,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:57:32,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:57:32,886 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:57:32,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-01-28 08:57:33,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:57:33,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:57:33,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 08:57:33,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:57:33,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:57:33,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-01-28 08:57:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:33,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:57:33,488 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-28 08:57:33,488 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 82 treesize of output 99 [2023-01-28 08:57:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:33,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779339706] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:57:33,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:57:33,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-01-28 08:57:33,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60594796] [2023-01-28 08:57:33,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:57:33,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 08:57:33,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:57:33,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 08:57:33,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-01-28 08:57:33,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:57:33,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 737 transitions, 35036 flow. Second operand has 21 states, 21 states have (on average 165.1904761904762) internal successors, (3469), 21 states have internal predecessors, (3469), 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) [2023-01-28 08:57:33,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:57:33,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:57:33,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:57:36,316 INFO L130 PetriNetUnfolder]: 3293/5855 cut-off events. [2023-01-28 08:57:36,317 INFO L131 PetriNetUnfolder]: For 595131/595131 co-relation queries the response was YES. [2023-01-28 08:57:36,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113568 conditions, 5855 events. 3293/5855 cut-off events. For 595131/595131 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 41914 event pairs, 574 based on Foata normal form. 8/5863 useless extension candidates. Maximal degree in co-relation 113376. Up to 3117 conditions per place. [2023-01-28 08:57:36,406 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 361 selfloop transitions, 418 changer transitions 7/786 dead transitions. [2023-01-28 08:57:36,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 786 transitions, 37245 flow [2023-01-28 08:57:36,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 08:57:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 08:57:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2855 transitions. [2023-01-28 08:57:36,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3434379886924095 [2023-01-28 08:57:36,408 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2855 transitions. [2023-01-28 08:57:36,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2855 transitions. [2023-01-28 08:57:36,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:57:36,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2855 transitions. [2023-01-28 08:57:36,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 167.94117647058823) internal successors, (2855), 17 states have internal predecessors, (2855), 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) [2023-01-28 08:57:36,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 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) [2023-01-28 08:57:36,413 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 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) [2023-01-28 08:57:36,413 INFO L175 Difference]: Start difference. First operand has 458 places, 737 transitions, 35036 flow. Second operand 17 states and 2855 transitions. [2023-01-28 08:57:36,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 786 transitions, 37245 flow [2023-01-28 08:57:39,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 786 transitions, 35981 flow, removed 54 selfloop flow, removed 14 redundant places. [2023-01-28 08:57:39,044 INFO L231 Difference]: Finished difference. Result has 459 places, 734 transitions, 34539 flow [2023-01-28 08:57:39,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=33720, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=34539, PETRI_PLACES=459, PETRI_TRANSITIONS=734} [2023-01-28 08:57:39,045 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 436 predicate places. [2023-01-28 08:57:39,045 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 734 transitions, 34539 flow [2023-01-28 08:57:39,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.1904761904762) internal successors, (3469), 21 states have internal predecessors, (3469), 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) [2023-01-28 08:57:39,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:57:39,045 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:57:39,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-01-28 08:57:39,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-01-28 08:57:39,246 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:57:39,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:57:39,246 INFO L85 PathProgramCache]: Analyzing trace with hash 87706125, now seen corresponding path program 51 times [2023-01-28 08:57:39,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:57:39,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003910832] [2023-01-28 08:57:39,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:57:39,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:57:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:57:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:39,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:57:39,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003910832] [2023-01-28 08:57:39,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003910832] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:57:39,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371199005] [2023-01-28 08:57:39,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 08:57:39,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:57:39,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:57:39,655 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:57:39,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-01-28 08:57:39,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 08:57:39,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:57:39,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-28 08:57:39,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:57:40,031 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:57:40,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 08:57:40,040 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:57:40,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:57:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:40,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:57:40,468 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:57:40,469 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 40 treesize of output 56 [2023-01-28 08:57:40,488 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:57:40,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 08:57:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:40,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371199005] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:57:40,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:57:40,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 23 [2023-01-28 08:57:40,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662019949] [2023-01-28 08:57:40,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:57:40,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 08:57:40,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:57:40,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 08:57:40,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-01-28 08:57:40,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-28 08:57:40,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 734 transitions, 34539 flow. Second operand has 23 states, 23 states have (on average 162.04347826086956) internal successors, (3727), 23 states have internal predecessors, (3727), 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) [2023-01-28 08:57:40,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:57:40,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-28 08:57:40,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:57:43,693 INFO L130 PetriNetUnfolder]: 3351/5977 cut-off events. [2023-01-28 08:57:43,693 INFO L131 PetriNetUnfolder]: For 620784/620784 co-relation queries the response was YES. [2023-01-28 08:57:43,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115588 conditions, 5977 events. 3351/5977 cut-off events. For 620784/620784 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 43022 event pairs, 400 based on Foata normal form. 22/5999 useless extension candidates. Maximal degree in co-relation 115398. Up to 3140 conditions per place. [2023-01-28 08:57:43,774 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 357 selfloop transitions, 455 changer transitions 5/817 dead transitions. [2023-01-28 08:57:43,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 817 transitions, 38028 flow [2023-01-28 08:57:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 08:57:43,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 08:57:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3476 transitions. [2023-01-28 08:57:43,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33849449800370046 [2023-01-28 08:57:43,777 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3476 transitions. [2023-01-28 08:57:43,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3476 transitions. [2023-01-28 08:57:43,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:57:43,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3476 transitions. [2023-01-28 08:57:43,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 165.52380952380952) internal successors, (3476), 21 states have internal predecessors, (3476), 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) [2023-01-28 08:57:43,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 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) [2023-01-28 08:57:43,783 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 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) [2023-01-28 08:57:43,783 INFO L175 Difference]: Start difference. First operand has 459 places, 734 transitions, 34539 flow. Second operand 21 states and 3476 transitions. [2023-01-28 08:57:43,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 817 transitions, 38028 flow [2023-01-28 08:57:45,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 817 transitions, 37356 flow, removed 83 selfloop flow, removed 15 redundant places. [2023-01-28 08:57:46,012 INFO L231 Difference]: Finished difference. Result has 466 places, 750 transitions, 35860 flow [2023-01-28 08:57:46,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=33892, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=35860, PETRI_PLACES=466, PETRI_TRANSITIONS=750} [2023-01-28 08:57:46,012 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 443 predicate places. [2023-01-28 08:57:46,013 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 750 transitions, 35860 flow [2023-01-28 08:57:46,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 162.04347826086956) internal successors, (3727), 23 states have internal predecessors, (3727), 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) [2023-01-28 08:57:46,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:57:46,013 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:57:46,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-01-28 08:57:46,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:57:46,214 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:57:46,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:57:46,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1228252999, now seen corresponding path program 52 times [2023-01-28 08:57:46,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:57:46,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852923147] [2023-01-28 08:57:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:57:46,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:57:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:57:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:46,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:57:46,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852923147] [2023-01-28 08:57:46,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852923147] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:57:46,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165181485] [2023-01-28 08:57:46,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 08:57:46,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:57:46,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:57:46,666 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:57:46,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-01-28 08:57:47,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 08:57:47,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:57:47,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:57:47,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:57:47,181 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:57:47,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 32 [2023-01-28 08:57:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:47,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:57:47,333 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:57:47,333 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 40 treesize of output 56 [2023-01-28 08:57:47,350 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:57:47,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 08:57:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:47,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165181485] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:57:47,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:57:47,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-28 08:57:47,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369039068] [2023-01-28 08:57:47,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:57:47,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 08:57:47,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:57:47,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 08:57:47,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-01-28 08:57:47,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:57:47,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 750 transitions, 35860 flow. Second operand has 19 states, 19 states have (on average 165.26315789473685) internal successors, (3140), 19 states have internal predecessors, (3140), 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) [2023-01-28 08:57:47,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:57:47,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:57:47,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:57:49,782 INFO L130 PetriNetUnfolder]: 3341/5957 cut-off events. [2023-01-28 08:57:49,782 INFO L131 PetriNetUnfolder]: For 637306/637306 co-relation queries the response was YES. [2023-01-28 08:57:49,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116420 conditions, 5957 events. 3341/5957 cut-off events. For 637306/637306 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 42825 event pairs, 820 based on Foata normal form. 8/5965 useless extension candidates. Maximal degree in co-relation 116228. Up to 4289 conditions per place. [2023-01-28 08:57:49,869 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 336 selfloop transitions, 427 changer transitions 10/773 dead transitions. [2023-01-28 08:57:49,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 773 transitions, 37528 flow [2023-01-28 08:57:49,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 08:57:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 08:57:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1852 transitions. [2023-01-28 08:57:49,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3443019148540621 [2023-01-28 08:57:49,871 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1852 transitions. [2023-01-28 08:57:49,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1852 transitions. [2023-01-28 08:57:49,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:57:49,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1852 transitions. [2023-01-28 08:57:49,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.36363636363637) internal successors, (1852), 11 states have internal predecessors, (1852), 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) [2023-01-28 08:57:49,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 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) [2023-01-28 08:57:49,874 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 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) [2023-01-28 08:57:49,874 INFO L175 Difference]: Start difference. First operand has 466 places, 750 transitions, 35860 flow. Second operand 11 states and 1852 transitions. [2023-01-28 08:57:49,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 773 transitions, 37528 flow [2023-01-28 08:57:52,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 773 transitions, 36381 flow, removed 143 selfloop flow, removed 13 redundant places. [2023-01-28 08:57:52,740 INFO L231 Difference]: Finished difference. Result has 463 places, 746 transitions, 35496 flow [2023-01-28 08:57:52,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=34673, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=35496, PETRI_PLACES=463, PETRI_TRANSITIONS=746} [2023-01-28 08:57:52,741 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 440 predicate places. [2023-01-28 08:57:52,741 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 746 transitions, 35496 flow [2023-01-28 08:57:52,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.26315789473685) internal successors, (3140), 19 states have internal predecessors, (3140), 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) [2023-01-28 08:57:52,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:57:52,742 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:57:52,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-01-28 08:57:52,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:57:52,942 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:57:52,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:57:52,943 INFO L85 PathProgramCache]: Analyzing trace with hash -747080383, now seen corresponding path program 53 times [2023-01-28 08:57:52,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:57:52,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129136164] [2023-01-28 08:57:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:57:52,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:57:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:57:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:53,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:57:53,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129136164] [2023-01-28 08:57:53,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129136164] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:57:53,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424229000] [2023-01-28 08:57:53,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 08:57:53,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:57:53,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:57:53,917 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:57:53,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-01-28 08:57:54,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 08:57:54,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:57:54,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 71 conjunts are in the unsatisfiable core [2023-01-28 08:57:54,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:57:54,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:57:54,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:57:54,450 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:57:54,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-01-28 08:57:54,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:57:54,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 08:57:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:54,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:57:54,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:57:54,976 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 94 treesize of output 130 [2023-01-28 08:57:54,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:57:54,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-28 08:57:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:57:55,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424229000] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:57:55,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:57:55,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 33 [2023-01-28 08:57:55,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588788780] [2023-01-28 08:57:55,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:57:55,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 08:57:55,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:57:55,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 08:57:55,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=991, Unknown=3, NotChecked=0, Total=1122 [2023-01-28 08:57:55,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 489 [2023-01-28 08:57:55,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 746 transitions, 35496 flow. Second operand has 34 states, 34 states have (on average 153.76470588235293) internal successors, (5228), 34 states have internal predecessors, (5228), 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) [2023-01-28 08:57:55,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:57:55,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 489 [2023-01-28 08:57:55,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:57:59,961 INFO L130 PetriNetUnfolder]: 3345/5977 cut-off events. [2023-01-28 08:57:59,962 INFO L131 PetriNetUnfolder]: For 675825/675825 co-relation queries the response was YES. [2023-01-28 08:58:00,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116249 conditions, 5977 events. 3345/5977 cut-off events. For 675825/675825 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 43062 event pairs, 90 based on Foata normal form. 22/5999 useless extension candidates. Maximal degree in co-relation 116060. Up to 2196 conditions per place. [2023-01-28 08:58:00,045 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 320 selfloop transitions, 516 changer transitions 14/850 dead transitions. [2023-01-28 08:58:00,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 850 transitions, 38950 flow [2023-01-28 08:58:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 08:58:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 08:58:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4411 transitions. [2023-01-28 08:58:00,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32215892491966114 [2023-01-28 08:58:00,048 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4411 transitions. [2023-01-28 08:58:00,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4411 transitions. [2023-01-28 08:58:00,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:58:00,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4411 transitions. [2023-01-28 08:58:00,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 157.53571428571428) internal successors, (4411), 28 states have internal predecessors, (4411), 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) [2023-01-28 08:58:00,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 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) [2023-01-28 08:58:00,056 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 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) [2023-01-28 08:58:00,056 INFO L175 Difference]: Start difference. First operand has 463 places, 746 transitions, 35496 flow. Second operand 28 states and 4411 transitions. [2023-01-28 08:58:00,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 850 transitions, 38950 flow [2023-01-28 08:58:02,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 850 transitions, 38374 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-01-28 08:58:02,554 INFO L231 Difference]: Finished difference. Result has 481 places, 755 transitions, 36574 flow [2023-01-28 08:58:02,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=34681, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=36574, PETRI_PLACES=481, PETRI_TRANSITIONS=755} [2023-01-28 08:58:02,554 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 458 predicate places. [2023-01-28 08:58:02,554 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 755 transitions, 36574 flow [2023-01-28 08:58:02,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 153.76470588235293) internal successors, (5228), 34 states have internal predecessors, (5228), 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) [2023-01-28 08:58:02,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:58:02,555 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:58:02,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-01-28 08:58:02,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:58:02,756 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:58:02,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:58:02,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1564822417, now seen corresponding path program 54 times [2023-01-28 08:58:02,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:58:02,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697282308] [2023-01-28 08:58:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:58:02,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:58:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:58:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:03,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:58:03,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697282308] [2023-01-28 08:58:03,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697282308] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:58:03,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712556940] [2023-01-28 08:58:03,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 08:58:03,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:58:03,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:58:03,277 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:58:03,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-01-28 08:58:03,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 08:58:03,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:58:03,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 08:58:03,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:58:03,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:03,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-01-28 08:58:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:03,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:58:03,872 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:58:03,872 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 40 treesize of output 56 [2023-01-28 08:58:03,888 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:58:03,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 08:58:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:03,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712556940] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:58:03,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:58:03,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 08:58:03,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208023160] [2023-01-28 08:58:03,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:58:03,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 08:58:03,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:58:03,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 08:58:03,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-01-28 08:58:03,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:58:03,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 755 transitions, 36574 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 08:58:03,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:58:03,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:58:03,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:58:06,949 INFO L130 PetriNetUnfolder]: 3311/5895 cut-off events. [2023-01-28 08:58:06,949 INFO L131 PetriNetUnfolder]: For 645417/645417 co-relation queries the response was YES. [2023-01-28 08:58:06,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117146 conditions, 5895 events. 3311/5895 cut-off events. For 645417/645417 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 42097 event pairs, 588 based on Foata normal form. 8/5903 useless extension candidates. Maximal degree in co-relation 116952. Up to 3233 conditions per place. [2023-01-28 08:58:07,046 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 352 selfloop transitions, 440 changer transitions 7/799 dead transitions. [2023-01-28 08:58:07,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 799 transitions, 38826 flow [2023-01-28 08:58:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 08:58:07,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 08:58:07,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2517 transitions. [2023-01-28 08:58:07,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3431492842535787 [2023-01-28 08:58:07,049 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2517 transitions. [2023-01-28 08:58:07,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2517 transitions. [2023-01-28 08:58:07,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:58:07,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2517 transitions. [2023-01-28 08:58:07,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 167.8) internal successors, (2517), 15 states have internal predecessors, (2517), 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) [2023-01-28 08:58:07,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:58:07,054 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 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) [2023-01-28 08:58:07,054 INFO L175 Difference]: Start difference. First operand has 481 places, 755 transitions, 36574 flow. Second operand 15 states and 2517 transitions. [2023-01-28 08:58:07,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 799 transitions, 38826 flow [2023-01-28 08:58:09,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 799 transitions, 37541 flow, removed 149 selfloop flow, removed 11 redundant places. [2023-01-28 08:58:09,657 INFO L231 Difference]: Finished difference. Result has 483 places, 752 transitions, 36095 flow [2023-01-28 08:58:09,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=35235, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=36095, PETRI_PLACES=483, PETRI_TRANSITIONS=752} [2023-01-28 08:58:09,658 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 460 predicate places. [2023-01-28 08:58:09,658 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 752 transitions, 36095 flow [2023-01-28 08:58:09,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 08:58:09,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:58:09,659 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:58:09,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-01-28 08:58:09,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-01-28 08:58:09,869 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:58:09,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:58:09,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1165633259, now seen corresponding path program 55 times [2023-01-28 08:58:09,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:58:09,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900498714] [2023-01-28 08:58:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:58:09,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:58:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:58:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:10,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:58:10,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900498714] [2023-01-28 08:58:10,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900498714] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:58:10,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430133756] [2023-01-28 08:58:10,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 08:58:10,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:58:10,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:58:10,354 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:58:10,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-01-28 08:58:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:58:10,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 53 conjunts are in the unsatisfiable core [2023-01-28 08:58:10,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:58:10,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:58:10,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 08:58:10,909 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:58:10,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 08:58:10,916 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:58:10,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:58:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:10,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:58:11,157 WARN L839 $PredicateComparison]: unable to prove that (and (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_4237 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4237))) (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset)))))) (forall ((v_ArrVal_4237 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4237))) (let ((.cse2 (select .cse1 ~o_2~0.base))) (or (not (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse2 c_~o_2~0.offset))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse2 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))))))) is different from false [2023-01-28 08:58:11,169 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:11,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-01-28 08:58:11,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:11,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-28 08:58:11,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:11,229 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 116 treesize of output 144 [2023-01-28 08:58:11,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:11,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-01-28 08:58:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:11,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430133756] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:58:11,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:58:11,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-01-28 08:58:11,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896575449] [2023-01-28 08:58:11,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:58:11,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 08:58:11,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:58:11,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 08:58:11,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=609, Unknown=1, NotChecked=50, Total=756 [2023-01-28 08:58:11,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-01-28 08:58:11,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 752 transitions, 36095 flow. Second operand has 28 states, 28 states have (on average 160.75) internal successors, (4501), 28 states have internal predecessors, (4501), 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) [2023-01-28 08:58:11,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:58:11,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-01-28 08:58:11,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:58:19,056 INFO L130 PetriNetUnfolder]: 3403/6057 cut-off events. [2023-01-28 08:58:19,057 INFO L131 PetriNetUnfolder]: For 675749/675749 co-relation queries the response was YES. [2023-01-28 08:58:19,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119753 conditions, 6057 events. 3403/6057 cut-off events. For 675749/675749 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 43490 event pairs, 498 based on Foata normal form. 8/6065 useless extension candidates. Maximal degree in co-relation 119560. Up to 2859 conditions per place. [2023-01-28 08:58:19,218 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 337 selfloop transitions, 490 changer transitions 5/832 dead transitions. [2023-01-28 08:58:19,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 832 transitions, 39683 flow [2023-01-28 08:58:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 08:58:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 08:58:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3122 transitions. [2023-01-28 08:58:19,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3360241093531374 [2023-01-28 08:58:19,221 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3122 transitions. [2023-01-28 08:58:19,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3122 transitions. [2023-01-28 08:58:19,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:58:19,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3122 transitions. [2023-01-28 08:58:19,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 164.31578947368422) internal successors, (3122), 19 states have internal predecessors, (3122), 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) [2023-01-28 08:58:19,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 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) [2023-01-28 08:58:19,229 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 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) [2023-01-28 08:58:19,229 INFO L175 Difference]: Start difference. First operand has 483 places, 752 transitions, 36095 flow. Second operand 19 states and 3122 transitions. [2023-01-28 08:58:19,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 832 transitions, 39683 flow [2023-01-28 08:58:21,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 832 transitions, 38834 flow, removed 37 selfloop flow, removed 17 redundant places. [2023-01-28 08:58:21,692 INFO L231 Difference]: Finished difference. Result has 485 places, 769 transitions, 37327 flow [2023-01-28 08:58:21,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=35299, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=474, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=37327, PETRI_PLACES=485, PETRI_TRANSITIONS=769} [2023-01-28 08:58:21,693 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 462 predicate places. [2023-01-28 08:58:21,693 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 769 transitions, 37327 flow [2023-01-28 08:58:21,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.75) internal successors, (4501), 28 states have internal predecessors, (4501), 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) [2023-01-28 08:58:21,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:58:21,694 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:58:21,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-01-28 08:58:21,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-01-28 08:58:21,895 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:58:21,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:58:21,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1142305331, now seen corresponding path program 56 times [2023-01-28 08:58:21,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:58:21,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135865890] [2023-01-28 08:58:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:58:21,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:58:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:58:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:22,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:58:22,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135865890] [2023-01-28 08:58:22,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135865890] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:58:22,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355860113] [2023-01-28 08:58:22,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:58:22,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:58:22,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:58:22,519 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:58:22,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-01-28 08:58:22,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:58:22,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:58:22,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 65 conjunts are in the unsatisfiable core [2023-01-28 08:58:22,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:58:22,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:58:22,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 08:58:23,114 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:58:23,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2023-01-28 08:58:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:23,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:58:23,399 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4308 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4308))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (not (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_4308 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4308))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))))) is different from false [2023-01-28 08:58:23,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:23,429 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 116 treesize of output 144 [2023-01-28 08:58:23,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:23,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-01-28 08:58:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:23,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355860113] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:58:23,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:58:23,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-01-28 08:58:23,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523363350] [2023-01-28 08:58:23,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:58:23,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 08:58:23,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:58:23,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 08:58:23,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=766, Unknown=1, NotChecked=56, Total=930 [2023-01-28 08:58:23,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-01-28 08:58:23,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 769 transitions, 37327 flow. Second operand has 31 states, 31 states have (on average 157.83870967741936) internal successors, (4893), 31 states have internal predecessors, (4893), 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) [2023-01-28 08:58:23,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:58:23,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-01-28 08:58:23,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:58:27,103 INFO L130 PetriNetUnfolder]: 3395/6049 cut-off events. [2023-01-28 08:58:27,104 INFO L131 PetriNetUnfolder]: For 673005/673005 co-relation queries the response was YES. [2023-01-28 08:58:27,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120559 conditions, 6049 events. 3395/6049 cut-off events. For 673005/673005 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 43436 event pairs, 254 based on Foata normal form. 8/6057 useless extension candidates. Maximal degree in co-relation 120364. Up to 4048 conditions per place. [2023-01-28 08:58:27,189 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 299 selfloop transitions, 488 changer transitions 11/798 dead transitions. [2023-01-28 08:58:27,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 798 transitions, 39148 flow [2023-01-28 08:58:27,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 08:58:27,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 08:58:27,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2259 transitions. [2023-01-28 08:58:27,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3299737072743208 [2023-01-28 08:58:27,191 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2259 transitions. [2023-01-28 08:58:27,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2259 transitions. [2023-01-28 08:58:27,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:58:27,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2259 transitions. [2023-01-28 08:58:27,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.35714285714286) internal successors, (2259), 14 states have internal predecessors, (2259), 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) [2023-01-28 08:58:27,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:58:27,195 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 08:58:27,195 INFO L175 Difference]: Start difference. First operand has 485 places, 769 transitions, 37327 flow. Second operand 14 states and 2259 transitions. [2023-01-28 08:58:27,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 798 transitions, 39148 flow [2023-01-28 08:58:29,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 798 transitions, 37959 flow, removed 61 selfloop flow, removed 13 redundant places. [2023-01-28 08:58:29,789 INFO L231 Difference]: Finished difference. Result has 487 places, 769 transitions, 37130 flow [2023-01-28 08:58:29,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=36138, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=37130, PETRI_PLACES=487, PETRI_TRANSITIONS=769} [2023-01-28 08:58:29,789 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 464 predicate places. [2023-01-28 08:58:29,790 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 769 transitions, 37130 flow [2023-01-28 08:58:29,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 157.83870967741936) internal successors, (4893), 31 states have internal predecessors, (4893), 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) [2023-01-28 08:58:29,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:58:29,790 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:58:29,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-01-28 08:58:29,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:58:29,991 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:58:29,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:58:29,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1271141633, now seen corresponding path program 57 times [2023-01-28 08:58:29,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:58:29,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352029673] [2023-01-28 08:58:29,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:58:29,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:58:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:58:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:30,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:58:30,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352029673] [2023-01-28 08:58:30,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352029673] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:58:30,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972195181] [2023-01-28 08:58:30,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 08:58:30,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:58:30,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:58:30,543 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:58:30,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-01-28 08:58:30,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 08:58:30,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:58:30,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 53 conjunts are in the unsatisfiable core [2023-01-28 08:58:30,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:58:31,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:58:31,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 08:58:31,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:31,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 08:58:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:31,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:58:31,422 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_4379 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4379))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_4379 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4379))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))) (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) is different from false [2023-01-28 08:58:31,452 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:31,452 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 116 treesize of output 144 [2023-01-28 08:58:31,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:31,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-01-28 08:58:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:31,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972195181] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:58:31,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:58:31,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 28 [2023-01-28 08:58:31,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139494225] [2023-01-28 08:58:31,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:58:31,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 08:58:31,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:58:31,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 08:58:31,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=650, Unknown=1, NotChecked=52, Total=812 [2023-01-28 08:58:31,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-01-28 08:58:31,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 769 transitions, 37130 flow. Second operand has 29 states, 29 states have (on average 160.79310344827587) internal successors, (4663), 29 states have internal predecessors, (4663), 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) [2023-01-28 08:58:31,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:58:31,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-01-28 08:58:31,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:58:34,669 INFO L130 PetriNetUnfolder]: 3397/6041 cut-off events. [2023-01-28 08:58:34,669 INFO L131 PetriNetUnfolder]: For 672711/672711 co-relation queries the response was YES. [2023-01-28 08:58:34,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120762 conditions, 6041 events. 3397/6041 cut-off events. For 672711/672711 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 43356 event pairs, 508 based on Foata normal form. 8/6049 useless extension candidates. Maximal degree in co-relation 120564. Up to 2937 conditions per place. [2023-01-28 08:58:34,749 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 341 selfloop transitions, 465 changer transitions 6/812 dead transitions. [2023-01-28 08:58:34,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 812 transitions, 39489 flow [2023-01-28 08:58:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 08:58:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 08:58:34,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2138 transitions. [2023-01-28 08:58:34,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33632216454302344 [2023-01-28 08:58:34,751 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2138 transitions. [2023-01-28 08:58:34,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2138 transitions. [2023-01-28 08:58:34,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:58:34,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2138 transitions. [2023-01-28 08:58:34,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 164.46153846153845) internal successors, (2138), 13 states have internal predecessors, (2138), 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) [2023-01-28 08:58:34,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 08:58:34,755 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 08:58:34,755 INFO L175 Difference]: Start difference. First operand has 487 places, 769 transitions, 37130 flow. Second operand 13 states and 2138 transitions. [2023-01-28 08:58:34,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 812 transitions, 39489 flow [2023-01-28 08:58:37,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 812 transitions, 38729 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-01-28 08:58:37,290 INFO L231 Difference]: Finished difference. Result has 486 places, 770 transitions, 37440 flow [2023-01-28 08:58:37,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=36383, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=37440, PETRI_PLACES=486, PETRI_TRANSITIONS=770} [2023-01-28 08:58:37,291 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 463 predicate places. [2023-01-28 08:58:37,291 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 770 transitions, 37440 flow [2023-01-28 08:58:37,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 160.79310344827587) internal successors, (4663), 29 states have internal predecessors, (4663), 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) [2023-01-28 08:58:37,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:58:37,292 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:58:37,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-01-28 08:58:37,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:58:37,492 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:58:37,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:58:37,492 INFO L85 PathProgramCache]: Analyzing trace with hash 894158783, now seen corresponding path program 58 times [2023-01-28 08:58:37,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:58:37,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204424758] [2023-01-28 08:58:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:58:37,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:58:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:58:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:38,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:58:38,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204424758] [2023-01-28 08:58:38,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204424758] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:58:38,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991258027] [2023-01-28 08:58:38,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 08:58:38,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:58:38,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:58:38,070 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:58:38,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-01-28 08:58:38,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 08:58:38,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:58:38,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 66 conjunts are in the unsatisfiable core [2023-01-28 08:58:38,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:58:38,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:58:38,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 08:58:38,699 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:58:38,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:58:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:38,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:58:39,213 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4450 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4450))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (not (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse0 c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_4450 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4450))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))))) is different from false [2023-01-28 08:58:39,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:39,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-01-28 08:58:39,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:39,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-28 08:58:39,290 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:39,290 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 116 treesize of output 144 [2023-01-28 08:58:39,308 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:39,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-01-28 08:58:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:39,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991258027] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:58:39,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:58:39,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 31 [2023-01-28 08:58:39,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343894703] [2023-01-28 08:58:39,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:58:39,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 08:58:39,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:58:39,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 08:58:39,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=817, Unknown=1, NotChecked=58, Total=992 [2023-01-28 08:58:39,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-01-28 08:58:39,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 770 transitions, 37440 flow. Second operand has 32 states, 32 states have (on average 157.78125) internal successors, (5049), 32 states have internal predecessors, (5049), 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) [2023-01-28 08:58:39,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:58:39,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-01-28 08:58:39,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:58:42,924 INFO L130 PetriNetUnfolder]: 3449/6125 cut-off events. [2023-01-28 08:58:42,924 INFO L131 PetriNetUnfolder]: For 685515/685515 co-relation queries the response was YES. [2023-01-28 08:58:42,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123840 conditions, 6125 events. 3449/6125 cut-off events. For 685515/685515 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 43878 event pairs, 238 based on Foata normal form. 20/6145 useless extension candidates. Maximal degree in co-relation 123644. Up to 3890 conditions per place. [2023-01-28 08:58:43,012 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 320 selfloop transitions, 502 changer transitions 1/823 dead transitions. [2023-01-28 08:58:43,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 823 transitions, 40576 flow [2023-01-28 08:58:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 08:58:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 08:58:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2740 transitions. [2023-01-28 08:58:43,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296042343317695 [2023-01-28 08:58:43,014 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2740 transitions. [2023-01-28 08:58:43,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2740 transitions. [2023-01-28 08:58:43,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:58:43,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2740 transitions. [2023-01-28 08:58:43,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 161.1764705882353) internal successors, (2740), 17 states have internal predecessors, (2740), 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) [2023-01-28 08:58:43,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 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) [2023-01-28 08:58:43,019 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 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) [2023-01-28 08:58:43,019 INFO L175 Difference]: Start difference. First operand has 486 places, 770 transitions, 37440 flow. Second operand 17 states and 2740 transitions. [2023-01-28 08:58:43,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 823 transitions, 40576 flow [2023-01-28 08:58:45,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 823 transitions, 40110 flow, removed 18 selfloop flow, removed 13 redundant places. [2023-01-28 08:58:45,665 INFO L231 Difference]: Finished difference. Result has 493 places, 783 transitions, 39551 flow [2023-01-28 08:58:45,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=36923, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=486, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=39551, PETRI_PLACES=493, PETRI_TRANSITIONS=783} [2023-01-28 08:58:45,666 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 470 predicate places. [2023-01-28 08:58:45,666 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 783 transitions, 39551 flow [2023-01-28 08:58:45,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 157.78125) internal successors, (5049), 32 states have internal predecessors, (5049), 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) [2023-01-28 08:58:45,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:58:45,667 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:58:45,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-01-28 08:58:45,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-01-28 08:58:45,867 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:58:45,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:58:45,868 INFO L85 PathProgramCache]: Analyzing trace with hash -482136279, now seen corresponding path program 59 times [2023-01-28 08:58:45,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:58:45,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667719075] [2023-01-28 08:58:45,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:58:45,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:58:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:58:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:46,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:58:46,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667719075] [2023-01-28 08:58:46,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667719075] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:58:46,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034662907] [2023-01-28 08:58:46,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 08:58:46,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:58:46,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:58:46,430 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:58:46,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-01-28 08:58:46,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 08:58:46,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:58:46,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-28 08:58:46,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:58:46,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:58:46,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 08:58:46,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:46,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2023-01-28 08:58:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:47,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:58:47,335 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4521 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4521))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (not (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset))) (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_4521 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4521))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))))) is different from false [2023-01-28 08:58:47,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:47,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-01-28 08:58:47,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:47,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-28 08:58:47,394 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:47,394 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 116 treesize of output 144 [2023-01-28 08:58:47,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:47,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-01-28 08:58:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:47,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034662907] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:58:47,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:58:47,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-01-28 08:58:47,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6099176] [2023-01-28 08:58:47,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:58:47,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 08:58:47,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:58:47,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 08:58:47,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=768, Unknown=1, NotChecked=56, Total=930 [2023-01-28 08:58:47,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-01-28 08:58:47,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 783 transitions, 39551 flow. Second operand has 31 states, 31 states have (on average 160.70967741935485) internal successors, (4982), 31 states have internal predecessors, (4982), 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) [2023-01-28 08:58:47,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:58:47,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-01-28 08:58:47,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:58:51,156 INFO L130 PetriNetUnfolder]: 3429/6085 cut-off events. [2023-01-28 08:58:51,156 INFO L131 PetriNetUnfolder]: For 742064/742064 co-relation queries the response was YES. [2023-01-28 08:58:51,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126927 conditions, 6085 events. 3429/6085 cut-off events. For 742064/742064 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 43584 event pairs, 544 based on Foata normal form. 8/6093 useless extension candidates. Maximal degree in co-relation 126730. Up to 3191 conditions per place. [2023-01-28 08:58:51,242 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 358 selfloop transitions, 457 changer transitions 7/822 dead transitions. [2023-01-28 08:58:51,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 822 transitions, 41754 flow [2023-01-28 08:58:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 08:58:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 08:58:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2782 transitions. [2023-01-28 08:58:51,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3346565620113076 [2023-01-28 08:58:51,244 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2782 transitions. [2023-01-28 08:58:51,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2782 transitions. [2023-01-28 08:58:51,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:58:51,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2782 transitions. [2023-01-28 08:58:51,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 163.64705882352942) internal successors, (2782), 17 states have internal predecessors, (2782), 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) [2023-01-28 08:58:51,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 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) [2023-01-28 08:58:51,249 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 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) [2023-01-28 08:58:51,249 INFO L175 Difference]: Start difference. First operand has 493 places, 783 transitions, 39551 flow. Second operand 17 states and 2782 transitions. [2023-01-28 08:58:51,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 822 transitions, 41754 flow [2023-01-28 08:58:54,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 822 transitions, 41360 flow, removed 66 selfloop flow, removed 9 redundant places. [2023-01-28 08:58:54,056 INFO L231 Difference]: Finished difference. Result has 500 places, 780 transitions, 40029 flow [2023-01-28 08:58:54,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=39129, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=457, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=40029, PETRI_PLACES=500, PETRI_TRANSITIONS=780} [2023-01-28 08:58:54,057 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 477 predicate places. [2023-01-28 08:58:54,057 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 780 transitions, 40029 flow [2023-01-28 08:58:54,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 160.70967741935485) internal successors, (4982), 31 states have internal predecessors, (4982), 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) [2023-01-28 08:58:54,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:58:54,057 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:58:54,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-01-28 08:58:54,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-01-28 08:58:54,258 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:58:54,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:58:54,258 INFO L85 PathProgramCache]: Analyzing trace with hash 888358531, now seen corresponding path program 60 times [2023-01-28 08:58:54,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:58:54,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231310190] [2023-01-28 08:58:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:58:54,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:58:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:58:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:54,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:58:54,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231310190] [2023-01-28 08:58:54,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231310190] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:58:54,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232328693] [2023-01-28 08:58:54,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 08:58:54,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:58:54,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:58:54,809 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:58:54,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-01-28 08:58:55,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 08:58:55,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:58:55,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 66 conjunts are in the unsatisfiable core [2023-01-28 08:58:55,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:58:55,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:58:55,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 08:58:55,489 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:58:55,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 08:58:55,497 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:58:55,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:58:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:55,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:58:55,942 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4592 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4592))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (not (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse0 c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_4592 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4592))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))))) is different from false [2023-01-28 08:58:55,952 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:55,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-01-28 08:58:55,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:55,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-28 08:58:56,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:56,005 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 116 treesize of output 144 [2023-01-28 08:58:56,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:58:56,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-01-28 08:58:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:58:56,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232328693] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:58:56,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:58:56,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-01-28 08:58:56,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917310986] [2023-01-28 08:58:56,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:58:56,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 08:58:56,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:58:56,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 08:58:56,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=764, Unknown=1, NotChecked=56, Total=930 [2023-01-28 08:58:56,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-01-28 08:58:56,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 780 transitions, 40029 flow. Second operand has 31 states, 31 states have (on average 157.80645161290323) internal successors, (4892), 31 states have internal predecessors, (4892), 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) [2023-01-28 08:58:56,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:58:56,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-01-28 08:58:56,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:58:59,892 INFO L130 PetriNetUnfolder]: 3413/6049 cut-off events. [2023-01-28 08:58:59,893 INFO L131 PetriNetUnfolder]: For 743442/743442 co-relation queries the response was YES. [2023-01-28 08:58:59,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127781 conditions, 6049 events. 3413/6049 cut-off events. For 743442/743442 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 43147 event pairs, 184 based on Foata normal form. 34/6083 useless extension candidates. Maximal degree in co-relation 127584. Up to 2990 conditions per place. [2023-01-28 08:58:59,986 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 373 selfloop transitions, 447 changer transitions 19/839 dead transitions. [2023-01-28 08:58:59,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 839 transitions, 42490 flow [2023-01-28 08:58:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 08:58:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 08:58:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3223 transitions. [2023-01-28 08:58:59,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3295501022494888 [2023-01-28 08:58:59,988 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3223 transitions. [2023-01-28 08:58:59,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3223 transitions. [2023-01-28 08:58:59,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:58:59,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3223 transitions. [2023-01-28 08:58:59,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 161.15) internal successors, (3223), 20 states have internal predecessors, (3223), 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) [2023-01-28 08:58:59,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 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) [2023-01-28 08:58:59,994 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 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) [2023-01-28 08:58:59,994 INFO L175 Difference]: Start difference. First operand has 500 places, 780 transitions, 40029 flow. Second operand 20 states and 3223 transitions. [2023-01-28 08:58:59,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 839 transitions, 42490 flow [2023-01-28 08:59:02,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 839 transitions, 41778 flow, removed 23 selfloop flow, removed 14 redundant places. [2023-01-28 08:59:02,887 INFO L231 Difference]: Finished difference. Result has 508 places, 778 transitions, 40109 flow [2023-01-28 08:59:02,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=38858, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=40109, PETRI_PLACES=508, PETRI_TRANSITIONS=778} [2023-01-28 08:59:02,888 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 485 predicate places. [2023-01-28 08:59:02,888 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 778 transitions, 40109 flow [2023-01-28 08:59:02,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 157.80645161290323) internal successors, (4892), 31 states have internal predecessors, (4892), 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) [2023-01-28 08:59:02,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:59:02,889 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:59:02,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-01-28 08:59:03,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:59:03,097 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:59:03,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:59:03,097 INFO L85 PathProgramCache]: Analyzing trace with hash -309870027, now seen corresponding path program 61 times [2023-01-28 08:59:03,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:59:03,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814520992] [2023-01-28 08:59:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:59:03,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:59:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:59:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:03,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:59:03,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814520992] [2023-01-28 08:59:03,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814520992] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:59:03,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968658634] [2023-01-28 08:59:03,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 08:59:03,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:59:03,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:59:03,487 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:59:03,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-01-28 08:59:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:59:03,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:59:03,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:59:03,901 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:59:03,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2023-01-28 08:59:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:03,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:59:04,039 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:59:04,039 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 32 treesize of output 48 [2023-01-28 08:59:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:04,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968658634] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:59:04,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:59:04,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-01-28 08:59:04,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047505214] [2023-01-28 08:59:04,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:59:04,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 08:59:04,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:59:04,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 08:59:04,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-01-28 08:59:04,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:59:04,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 778 transitions, 40109 flow. Second operand has 18 states, 18 states have (on average 165.33333333333334) internal successors, (2976), 18 states have internal predecessors, (2976), 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) [2023-01-28 08:59:04,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:59:04,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:59:04,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:59:07,062 INFO L130 PetriNetUnfolder]: 3717/6567 cut-off events. [2023-01-28 08:59:07,063 INFO L131 PetriNetUnfolder]: For 782652/782652 co-relation queries the response was YES. [2023-01-28 08:59:07,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137722 conditions, 6567 events. 3717/6567 cut-off events. For 782652/782652 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 47137 event pairs, 464 based on Foata normal form. 28/6595 useless extension candidates. Maximal degree in co-relation 137520. Up to 2280 conditions per place. [2023-01-28 08:59:07,314 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 544 selfloop transitions, 352 changer transitions 2/898 dead transitions. [2023-01-28 08:59:07,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 898 transitions, 46145 flow [2023-01-28 08:59:07,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 08:59:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 08:59:07,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2041 transitions. [2023-01-28 08:59:07,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3478186775732788 [2023-01-28 08:59:07,316 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2041 transitions. [2023-01-28 08:59:07,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2041 transitions. [2023-01-28 08:59:07,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:59:07,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2041 transitions. [2023-01-28 08:59:07,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 170.08333333333334) internal successors, (2041), 12 states have internal predecessors, (2041), 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) [2023-01-28 08:59:07,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 08:59:07,319 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 08:59:07,320 INFO L175 Difference]: Start difference. First operand has 508 places, 778 transitions, 40109 flow. Second operand 12 states and 2041 transitions. [2023-01-28 08:59:07,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 898 transitions, 46145 flow [2023-01-28 08:59:10,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 898 transitions, 45483 flow, removed 136 selfloop flow, removed 12 redundant places. [2023-01-28 08:59:10,374 INFO L231 Difference]: Finished difference. Result has 505 places, 792 transitions, 40913 flow [2023-01-28 08:59:10,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=39514, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=40913, PETRI_PLACES=505, PETRI_TRANSITIONS=792} [2023-01-28 08:59:10,375 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 482 predicate places. [2023-01-28 08:59:10,375 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 792 transitions, 40913 flow [2023-01-28 08:59:10,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 165.33333333333334) internal successors, (2976), 18 states have internal predecessors, (2976), 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) [2023-01-28 08:59:10,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:59:10,375 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:59:10,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-01-28 08:59:10,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-01-28 08:59:10,576 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:59:10,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:59:10,576 INFO L85 PathProgramCache]: Analyzing trace with hash 332522005, now seen corresponding path program 62 times [2023-01-28 08:59:10,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:59:10,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166255911] [2023-01-28 08:59:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:59:10,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:59:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:59:11,151 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:11,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:59:11,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166255911] [2023-01-28 08:59:11,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166255911] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:59:11,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69101940] [2023-01-28 08:59:11,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:59:11,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:59:11,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:59:11,153 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:59:11,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-01-28 08:59:11,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:59:11,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:59:11,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-28 08:59:11,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:59:11,809 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:59:11,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 08:59:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:11,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:59:12,170 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:59:12,171 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 32 treesize of output 48 [2023-01-28 08:59:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:12,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69101940] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:59:12,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:59:12,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 26 [2023-01-28 08:59:12,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972596090] [2023-01-28 08:59:12,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:59:12,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 08:59:12,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:59:12,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 08:59:12,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-01-28 08:59:12,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-28 08:59:12,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 792 transitions, 40913 flow. Second operand has 26 states, 26 states have (on average 162.0) internal successors, (4212), 26 states have internal predecessors, (4212), 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) [2023-01-28 08:59:12,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:59:12,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-28 08:59:12,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:59:16,018 INFO L130 PetriNetUnfolder]: 3895/6881 cut-off events. [2023-01-28 08:59:16,018 INFO L131 PetriNetUnfolder]: For 823338/823338 co-relation queries the response was YES. [2023-01-28 08:59:16,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143457 conditions, 6881 events. 3895/6881 cut-off events. For 823338/823338 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 49823 event pairs, 231 based on Foata normal form. 60/6941 useless extension candidates. Maximal degree in co-relation 143250. Up to 2902 conditions per place. [2023-01-28 08:59:16,118 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 320 selfloop transitions, 572 changer transitions 2/894 dead transitions. [2023-01-28 08:59:16,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 894 transitions, 45357 flow [2023-01-28 08:59:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 08:59:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 08:59:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3976 transitions. [2023-01-28 08:59:16,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387866394001363 [2023-01-28 08:59:16,121 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3976 transitions. [2023-01-28 08:59:16,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3976 transitions. [2023-01-28 08:59:16,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:59:16,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3976 transitions. [2023-01-28 08:59:16,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 165.66666666666666) internal successors, (3976), 24 states have internal predecessors, (3976), 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) [2023-01-28 08:59:16,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 489.0) internal successors, (12225), 25 states have internal predecessors, (12225), 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) [2023-01-28 08:59:16,131 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 489.0) internal successors, (12225), 25 states have internal predecessors, (12225), 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) [2023-01-28 08:59:16,131 INFO L175 Difference]: Start difference. First operand has 505 places, 792 transitions, 40913 flow. Second operand 24 states and 3976 transitions. [2023-01-28 08:59:16,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 894 transitions, 45357 flow [2023-01-28 08:59:19,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 894 transitions, 44952 flow, removed 81 selfloop flow, removed 8 redundant places. [2023-01-28 08:59:19,885 INFO L231 Difference]: Finished difference. Result has 528 places, 831 transitions, 43971 flow [2023-01-28 08:59:19,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=40508, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=537, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=43971, PETRI_PLACES=528, PETRI_TRANSITIONS=831} [2023-01-28 08:59:19,885 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 505 predicate places. [2023-01-28 08:59:19,885 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 831 transitions, 43971 flow [2023-01-28 08:59:19,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 162.0) internal successors, (4212), 26 states have internal predecessors, (4212), 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) [2023-01-28 08:59:19,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:59:19,886 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:59:19,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-01-28 08:59:20,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:59:20,087 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:59:20,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:59:20,087 INFO L85 PathProgramCache]: Analyzing trace with hash 825323069, now seen corresponding path program 63 times [2023-01-28 08:59:20,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:59:20,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977865770] [2023-01-28 08:59:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:59:20,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:59:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:59:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:20,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:59:20,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977865770] [2023-01-28 08:59:20,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977865770] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:59:20,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387878234] [2023-01-28 08:59:20,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 08:59:20,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:59:20,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:59:20,529 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:59:20,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-01-28 08:59:20,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 08:59:20,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:59:20,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 08:59:20,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:59:21,085 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 08:59:21,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 23 [2023-01-28 08:59:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:21,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:59:21,261 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:59:21,261 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 32 treesize of output 48 [2023-01-28 08:59:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:21,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387878234] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:59:21,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:59:21,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-01-28 08:59:21,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978645533] [2023-01-28 08:59:21,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:59:21,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 08:59:21,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:59:21,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 08:59:21,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-01-28 08:59:21,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:59:21,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 831 transitions, 43971 flow. Second operand has 19 states, 19 states have (on average 165.31578947368422) internal successors, (3141), 19 states have internal predecessors, (3141), 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) [2023-01-28 08:59:21,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:59:21,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:59:21,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:59:24,549 INFO L130 PetriNetUnfolder]: 3967/7005 cut-off events. [2023-01-28 08:59:24,550 INFO L131 PetriNetUnfolder]: For 949155/949155 co-relation queries the response was YES. [2023-01-28 08:59:24,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148874 conditions, 7005 events. 3967/7005 cut-off events. For 949155/949155 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 51058 event pairs, 1444 based on Foata normal form. 20/7025 useless extension candidates. Maximal degree in co-relation 148658. Up to 6221 conditions per place. [2023-01-28 08:59:24,651 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 688 selfloop transitions, 179 changer transitions 1/868 dead transitions. [2023-01-28 08:59:24,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 868 transitions, 46793 flow [2023-01-28 08:59:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 08:59:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 08:59:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1689 transitions. [2023-01-28 08:59:24,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345398773006135 [2023-01-28 08:59:24,652 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1689 transitions. [2023-01-28 08:59:24,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1689 transitions. [2023-01-28 08:59:24,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:59:24,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1689 transitions. [2023-01-28 08:59:24,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.9) internal successors, (1689), 10 states have internal predecessors, (1689), 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) [2023-01-28 08:59:24,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 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) [2023-01-28 08:59:24,656 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 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) [2023-01-28 08:59:24,656 INFO L175 Difference]: Start difference. First operand has 528 places, 831 transitions, 43971 flow. Second operand 10 states and 1689 transitions. [2023-01-28 08:59:24,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 868 transitions, 46793 flow [2023-01-28 08:59:28,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 868 transitions, 45396 flow, removed 217 selfloop flow, removed 12 redundant places. [2023-01-28 08:59:28,289 INFO L231 Difference]: Finished difference. Result has 527 places, 843 transitions, 43446 flow [2023-01-28 08:59:28,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=42604, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=43446, PETRI_PLACES=527, PETRI_TRANSITIONS=843} [2023-01-28 08:59:28,290 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 504 predicate places. [2023-01-28 08:59:28,290 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 843 transitions, 43446 flow [2023-01-28 08:59:28,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 165.31578947368422) internal successors, (3141), 19 states have internal predecessors, (3141), 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) [2023-01-28 08:59:28,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:59:28,291 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:59:28,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-01-28 08:59:28,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:59:28,492 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:59:28,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:59:28,492 INFO L85 PathProgramCache]: Analyzing trace with hash -499439099, now seen corresponding path program 64 times [2023-01-28 08:59:28,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:59:28,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570863450] [2023-01-28 08:59:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:59:28,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:59:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:59:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:28,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:59:28,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570863450] [2023-01-28 08:59:28,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570863450] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:59:28,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952623471] [2023-01-28 08:59:28,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 08:59:28,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:59:28,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:59:28,973 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:59:28,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-01-28 08:59:29,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 08:59:29,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:59:29,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-28 08:59:29,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:59:29,385 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:59:29,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 08:59:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:29,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:59:29,721 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-28 08:59:29,721 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 32 treesize of output 48 [2023-01-28 08:59:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:29,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952623471] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:59:29,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:59:29,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-01-28 08:59:29,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120530025] [2023-01-28 08:59:29,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:59:29,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 08:59:29,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:59:29,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 08:59:29,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-01-28 08:59:29,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-28 08:59:29,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 843 transitions, 43446 flow. Second operand has 22 states, 22 states have (on average 162.22727272727272) internal successors, (3569), 22 states have internal predecessors, (3569), 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) [2023-01-28 08:59:29,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:59:29,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-28 08:59:29,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:59:33,155 INFO L130 PetriNetUnfolder]: 3955/6969 cut-off events. [2023-01-28 08:59:33,155 INFO L131 PetriNetUnfolder]: For 910432/910432 co-relation queries the response was YES. [2023-01-28 08:59:33,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146043 conditions, 6969 events. 3955/6969 cut-off events. For 910432/910432 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 50530 event pairs, 300 based on Foata normal form. 4/6973 useless extension candidates. Maximal degree in co-relation 145828. Up to 4734 conditions per place. [2023-01-28 08:59:33,302 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 330 selfloop transitions, 541 changer transitions 3/874 dead transitions. [2023-01-28 08:59:33,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 874 transitions, 45479 flow [2023-01-28 08:59:33,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 08:59:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 08:59:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2804 transitions. [2023-01-28 08:59:33,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3373030193672561 [2023-01-28 08:59:33,305 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2804 transitions. [2023-01-28 08:59:33,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2804 transitions. [2023-01-28 08:59:33,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:59:33,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2804 transitions. [2023-01-28 08:59:33,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 164.94117647058823) internal successors, (2804), 17 states have internal predecessors, (2804), 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) [2023-01-28 08:59:33,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 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) [2023-01-28 08:59:33,311 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 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) [2023-01-28 08:59:33,312 INFO L175 Difference]: Start difference. First operand has 527 places, 843 transitions, 43446 flow. Second operand 17 states and 2804 transitions. [2023-01-28 08:59:33,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 874 transitions, 45479 flow [2023-01-28 08:59:36,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 874 transitions, 45005 flow, removed 67 selfloop flow, removed 7 redundant places. [2023-01-28 08:59:36,939 INFO L231 Difference]: Finished difference. Result has 538 places, 844 transitions, 44602 flow [2023-01-28 08:59:36,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=42802, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=538, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=44602, PETRI_PLACES=538, PETRI_TRANSITIONS=844} [2023-01-28 08:59:36,939 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 515 predicate places. [2023-01-28 08:59:36,939 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 844 transitions, 44602 flow [2023-01-28 08:59:36,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 162.22727272727272) internal successors, (3569), 22 states have internal predecessors, (3569), 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) [2023-01-28 08:59:36,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:59:36,940 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:59:36,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-01-28 08:59:37,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-01-28 08:59:37,141 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:59:37,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:59:37,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2019952155, now seen corresponding path program 65 times [2023-01-28 08:59:37,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:59:37,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219020157] [2023-01-28 08:59:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:59:37,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:59:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:59:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:37,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:59:37,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219020157] [2023-01-28 08:59:37,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219020157] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:59:37,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203480482] [2023-01-28 08:59:37,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 08:59:37,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:59:37,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:59:37,849 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:59:37,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-01-28 08:59:38,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 08:59:38,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:59:38,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 08:59:38,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:59:38,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:59:38,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 59 [2023-01-28 08:59:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:38,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:59:38,683 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-28 08:59:38,683 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 71 treesize of output 88 [2023-01-28 08:59:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:38,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203480482] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:59:38,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:59:38,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 25 [2023-01-28 08:59:38,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885710217] [2023-01-28 08:59:38,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:59:38,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 08:59:38,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:59:38,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 08:59:38,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2023-01-28 08:59:38,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:59:38,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 844 transitions, 44602 flow. Second operand has 25 states, 25 states have (on average 165.16) internal successors, (4129), 25 states have internal predecessors, (4129), 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) [2023-01-28 08:59:38,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:59:38,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:59:38,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:59:42,029 INFO L130 PetriNetUnfolder]: 3975/7017 cut-off events. [2023-01-28 08:59:42,029 INFO L131 PetriNetUnfolder]: For 977862/977862 co-relation queries the response was YES. [2023-01-28 08:59:42,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149641 conditions, 7017 events. 3975/7017 cut-off events. For 977862/977862 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 51191 event pairs, 1462 based on Foata normal form. 20/7037 useless extension candidates. Maximal degree in co-relation 149424. Up to 6261 conditions per place. [2023-01-28 08:59:42,135 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 708 selfloop transitions, 155 changer transitions 0/863 dead transitions. [2023-01-28 08:59:42,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 863 transitions, 46674 flow [2023-01-28 08:59:42,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 08:59:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 08:59:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1688 transitions. [2023-01-28 08:59:42,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34519427402862984 [2023-01-28 08:59:42,136 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1688 transitions. [2023-01-28 08:59:42,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1688 transitions. [2023-01-28 08:59:42,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:59:42,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1688 transitions. [2023-01-28 08:59:42,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.8) internal successors, (1688), 10 states have internal predecessors, (1688), 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) [2023-01-28 08:59:42,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 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) [2023-01-28 08:59:42,139 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 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) [2023-01-28 08:59:42,139 INFO L175 Difference]: Start difference. First operand has 538 places, 844 transitions, 44602 flow. Second operand 10 states and 1688 transitions. [2023-01-28 08:59:42,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 863 transitions, 46674 flow [2023-01-28 08:59:45,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 863 transitions, 46407 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-01-28 08:59:45,679 INFO L231 Difference]: Finished difference. Result has 538 places, 846 transitions, 44771 flow [2023-01-28 08:59:45,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44235, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=44771, PETRI_PLACES=538, PETRI_TRANSITIONS=846} [2023-01-28 08:59:45,679 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 515 predicate places. [2023-01-28 08:59:45,679 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 846 transitions, 44771 flow [2023-01-28 08:59:45,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 165.16) internal successors, (4129), 25 states have internal predecessors, (4129), 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) [2023-01-28 08:59:45,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:59:45,680 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:59:45,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-01-28 08:59:45,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:59:45,885 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:59:45,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:59:45,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1259857799, now seen corresponding path program 66 times [2023-01-28 08:59:45,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:59:45,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630829646] [2023-01-28 08:59:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:59:45,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:59:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:59:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:46,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:59:46,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630829646] [2023-01-28 08:59:46,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630829646] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:59:46,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200857037] [2023-01-28 08:59:46,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 08:59:46,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:59:46,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:59:46,385 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:59:46,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-01-28 08:59:46,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 08:59:46,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:59:46,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-28 08:59:46,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:59:46,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:59:46,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-01-28 08:59:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:46,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:59:47,236 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:59:47,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 08:59:47,268 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:59:47,268 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 40 treesize of output 56 [2023-01-28 08:59:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:47,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200857037] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:59:47,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:59:47,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2023-01-28 08:59:47,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85723348] [2023-01-28 08:59:47,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:59:47,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 08:59:47,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:59:47,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 08:59:47,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2023-01-28 08:59:47,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:59:47,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 846 transitions, 44771 flow. Second operand has 24 states, 24 states have (on average 164.91666666666666) internal successors, (3958), 24 states have internal predecessors, (3958), 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) [2023-01-28 08:59:47,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:59:47,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:59:47,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:59:51,816 INFO L130 PetriNetUnfolder]: 4073/7239 cut-off events. [2023-01-28 08:59:51,816 INFO L131 PetriNetUnfolder]: For 982438/982438 co-relation queries the response was YES. [2023-01-28 08:59:51,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153898 conditions, 7239 events. 4073/7239 cut-off events. For 982438/982438 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 53418 event pairs, 666 based on Foata normal form. 44/7283 useless extension candidates. Maximal degree in co-relation 153680. Up to 3663 conditions per place. [2023-01-28 08:59:51,922 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 445 selfloop transitions, 508 changer transitions 3/956 dead transitions. [2023-01-28 08:59:51,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 956 transitions, 49206 flow [2023-01-28 08:59:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 08:59:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 08:59:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4868 transitions. [2023-01-28 08:59:51,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3432762146534095 [2023-01-28 08:59:51,925 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4868 transitions. [2023-01-28 08:59:51,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4868 transitions. [2023-01-28 08:59:51,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:59:51,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4868 transitions. [2023-01-28 08:59:51,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 167.86206896551724) internal successors, (4868), 29 states have internal predecessors, (4868), 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) [2023-01-28 08:59:51,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 489.0) internal successors, (14670), 30 states have internal predecessors, (14670), 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) [2023-01-28 08:59:51,933 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 489.0) internal successors, (14670), 30 states have internal predecessors, (14670), 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) [2023-01-28 08:59:51,933 INFO L175 Difference]: Start difference. First operand has 538 places, 846 transitions, 44771 flow. Second operand 29 states and 4868 transitions. [2023-01-28 08:59:51,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 956 transitions, 49206 flow [2023-01-28 08:59:55,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 956 transitions, 48794 flow, removed 52 selfloop flow, removed 9 redundant places. [2023-01-28 08:59:55,825 INFO L231 Difference]: Finished difference. Result has 566 places, 879 transitions, 47397 flow [2023-01-28 08:59:55,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44275, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=47397, PETRI_PLACES=566, PETRI_TRANSITIONS=879} [2023-01-28 08:59:55,826 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 543 predicate places. [2023-01-28 08:59:55,826 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 879 transitions, 47397 flow [2023-01-28 08:59:55,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 164.91666666666666) internal successors, (3958), 24 states have internal predecessors, (3958), 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) [2023-01-28 08:59:55,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:59:55,827 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:59:55,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-01-28 08:59:56,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:59:56,027 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:59:56,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:59:56,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1724191649, now seen corresponding path program 67 times [2023-01-28 08:59:56,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:59:56,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714151682] [2023-01-28 08:59:56,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:59:56,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:59:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:59:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:56,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:59:56,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714151682] [2023-01-28 08:59:56,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714151682] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:59:56,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778981242] [2023-01-28 08:59:56,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 08:59:56,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:59:56,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:59:56,548 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:59:56,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-01-28 08:59:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:59:56,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 08:59:56,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:59:56,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:59:56,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 08:59:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:57,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:59:57,197 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 08:59:57,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 08:59:57,230 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 08:59:57,231 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 40 treesize of output 56 [2023-01-28 08:59:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 08:59:57,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778981242] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:59:57,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:59:57,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-01-28 08:59:57,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807133469] [2023-01-28 08:59:57,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:59:57,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 08:59:57,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:59:57,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 08:59:57,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-01-28 08:59:57,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 08:59:57,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 879 transitions, 47397 flow. Second operand has 20 states, 20 states have (on average 165.2) internal successors, (3304), 20 states have internal predecessors, (3304), 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) [2023-01-28 08:59:57,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:59:57,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 08:59:57,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:00:00,800 INFO L130 PetriNetUnfolder]: 4097/7299 cut-off events. [2023-01-28 09:00:00,801 INFO L131 PetriNetUnfolder]: For 1039454/1039454 co-relation queries the response was YES. [2023-01-28 09:00:00,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158751 conditions, 7299 events. 4097/7299 cut-off events. For 1039454/1039454 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 54099 event pairs, 1548 based on Foata normal form. 20/7319 useless extension candidates. Maximal degree in co-relation 158524. Up to 6533 conditions per place. [2023-01-28 09:00:00,915 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 750 selfloop transitions, 150 changer transitions 0/900 dead transitions. [2023-01-28 09:00:00,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 900 transitions, 49719 flow [2023-01-28 09:00:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 09:00:00,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 09:00:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1687 transitions. [2023-01-28 09:00:00,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34498977505112477 [2023-01-28 09:00:00,917 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1687 transitions. [2023-01-28 09:00:00,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1687 transitions. [2023-01-28 09:00:00,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:00:00,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1687 transitions. [2023-01-28 09:00:00,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.7) internal successors, (1687), 10 states have internal predecessors, (1687), 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) [2023-01-28 09:00:00,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 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) [2023-01-28 09:00:00,920 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 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) [2023-01-28 09:00:00,920 INFO L175 Difference]: Start difference. First operand has 566 places, 879 transitions, 47397 flow. Second operand 10 states and 1687 transitions. [2023-01-28 09:00:00,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 900 transitions, 49719 flow [2023-01-28 09:00:05,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 900 transitions, 48440 flow, removed 302 selfloop flow, removed 13 redundant places. [2023-01-28 09:00:05,803 INFO L231 Difference]: Finished difference. Result has 564 places, 883 transitions, 46670 flow [2023-01-28 09:00:05,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=46120, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=879, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=46670, PETRI_PLACES=564, PETRI_TRANSITIONS=883} [2023-01-28 09:00:05,804 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 541 predicate places. [2023-01-28 09:00:05,804 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 883 transitions, 46670 flow [2023-01-28 09:00:05,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.2) internal successors, (3304), 20 states have internal predecessors, (3304), 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) [2023-01-28 09:00:05,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:00:05,805 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:00:05,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-01-28 09:00:06,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:00:06,005 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:00:06,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:00:06,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1818498919, now seen corresponding path program 68 times [2023-01-28 09:00:06,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:00:06,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644535931] [2023-01-28 09:00:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:00:06,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:00:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:00:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:06,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:00:06,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644535931] [2023-01-28 09:00:06,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644535931] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:00:06,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987050123] [2023-01-28 09:00:06,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:00:06,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:00:06,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:00:06,556 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:00:06,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-01-28 09:00:06,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:00:06,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:00:06,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 09:00:06,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:00:07,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:00:07,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-01-28 09:00:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:07,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:00:07,248 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-28 09:00:07,249 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 71 treesize of output 88 [2023-01-28 09:00:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:07,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987050123] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:00:07,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:00:07,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 09:00:07,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36543823] [2023-01-28 09:00:07,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:00:07,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 09:00:07,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:00:07,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 09:00:07,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-01-28 09:00:07,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:00:07,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 883 transitions, 46670 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 09:00:07,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:00:07,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:00:07,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:00:10,875 INFO L130 PetriNetUnfolder]: 4095/7303 cut-off events. [2023-01-28 09:00:10,875 INFO L131 PetriNetUnfolder]: For 1015304/1015304 co-relation queries the response was YES. [2023-01-28 09:00:10,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156315 conditions, 7303 events. 4095/7303 cut-off events. For 1015304/1015304 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 54211 event pairs, 1562 based on Foata normal form. 4/7307 useless extension candidates. Maximal degree in co-relation 156086. Up to 6627 conditions per place. [2023-01-28 09:00:10,990 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 741 selfloop transitions, 146 changer transitions 6/893 dead transitions. [2023-01-28 09:00:10,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 893 transitions, 48636 flow [2023-01-28 09:00:10,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:00:10,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:00:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1512 transitions. [2023-01-28 09:00:10,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34355828220858897 [2023-01-28 09:00:10,991 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1512 transitions. [2023-01-28 09:00:10,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1512 transitions. [2023-01-28 09:00:10,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:00:10,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1512 transitions. [2023-01-28 09:00:10,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.0) internal successors, (1512), 9 states have internal predecessors, (1512), 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) [2023-01-28 09:00:10,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 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) [2023-01-28 09:00:10,994 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 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) [2023-01-28 09:00:10,994 INFO L175 Difference]: Start difference. First operand has 564 places, 883 transitions, 46670 flow. Second operand 9 states and 1512 transitions. [2023-01-28 09:00:10,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 893 transitions, 48636 flow [2023-01-28 09:00:15,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 893 transitions, 48226 flow, removed 56 selfloop flow, removed 8 redundant places. [2023-01-28 09:00:15,552 INFO L231 Difference]: Finished difference. Result has 565 places, 881 transitions, 46534 flow [2023-01-28 09:00:15,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=46264, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=46534, PETRI_PLACES=565, PETRI_TRANSITIONS=881} [2023-01-28 09:00:15,552 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 542 predicate places. [2023-01-28 09:00:15,553 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 881 transitions, 46534 flow [2023-01-28 09:00:15,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 09:00:15,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:00:15,553 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:00:15,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-01-28 09:00:15,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-01-28 09:00:15,754 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:00:15,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:00:15,754 INFO L85 PathProgramCache]: Analyzing trace with hash 595929495, now seen corresponding path program 69 times [2023-01-28 09:00:15,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:00:15,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477999833] [2023-01-28 09:00:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:00:15,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:00:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:00:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:16,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:00:16,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477999833] [2023-01-28 09:00:16,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477999833] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:00:16,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152429946] [2023-01-28 09:00:16,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:00:16,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:00:16,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:00:16,273 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:00:16,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-01-28 09:00:16,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 09:00:16,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:00:16,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-28 09:00:16,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:00:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:16,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:00:16,928 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-28 09:00:16,928 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 71 treesize of output 88 [2023-01-28 09:00:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:16,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152429946] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:00:16,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:00:16,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2023-01-28 09:00:16,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908245356] [2023-01-28 09:00:16,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:00:16,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 09:00:16,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:00:16,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 09:00:16,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-01-28 09:00:16,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:00:16,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 881 transitions, 46534 flow. Second operand has 22 states, 22 states have (on average 165.0909090909091) internal successors, (3632), 22 states have internal predecessors, (3632), 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) [2023-01-28 09:00:16,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:00:16,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:00:16,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:00:20,976 INFO L130 PetriNetUnfolder]: 4077/7253 cut-off events. [2023-01-28 09:00:20,976 INFO L131 PetriNetUnfolder]: For 995470/995470 co-relation queries the response was YES. [2023-01-28 09:00:21,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155074 conditions, 7253 events. 4077/7253 cut-off events. For 995470/995470 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 53609 event pairs, 718 based on Foata normal form. 4/7257 useless extension candidates. Maximal degree in co-relation 154844. Up to 3909 conditions per place. [2023-01-28 09:00:21,111 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 421 selfloop transitions, 480 changer transitions 13/914 dead transitions. [2023-01-28 09:00:21,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 914 transitions, 48687 flow [2023-01-28 09:00:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 09:00:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 09:00:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2344 transitions. [2023-01-28 09:00:21,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34238971662284545 [2023-01-28 09:00:21,113 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2344 transitions. [2023-01-28 09:00:21,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2344 transitions. [2023-01-28 09:00:21,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:00:21,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2344 transitions. [2023-01-28 09:00:21,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 167.42857142857142) internal successors, (2344), 14 states have internal predecessors, (2344), 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) [2023-01-28 09:00:21,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 09:00:21,118 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 09:00:21,118 INFO L175 Difference]: Start difference. First operand has 565 places, 881 transitions, 46534 flow. Second operand 14 states and 2344 transitions. [2023-01-28 09:00:21,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 914 transitions, 48687 flow [2023-01-28 09:00:25,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 914 transitions, 48393 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-01-28 09:00:25,563 INFO L231 Difference]: Finished difference. Result has 569 places, 874 transitions, 46759 flow [2023-01-28 09:00:25,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=46145, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=480, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=46759, PETRI_PLACES=569, PETRI_TRANSITIONS=874} [2023-01-28 09:00:25,564 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 546 predicate places. [2023-01-28 09:00:25,564 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 874 transitions, 46759 flow [2023-01-28 09:00:25,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 165.0909090909091) internal successors, (3632), 22 states have internal predecessors, (3632), 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) [2023-01-28 09:00:25,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:00:25,565 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:00:25,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-01-28 09:00:25,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:00:25,768 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:00:25,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:00:25,768 INFO L85 PathProgramCache]: Analyzing trace with hash -287115501, now seen corresponding path program 70 times [2023-01-28 09:00:25,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:00:25,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320279977] [2023-01-28 09:00:25,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:00:25,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:00:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:00:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:26,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:00:26,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320279977] [2023-01-28 09:00:26,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320279977] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:00:26,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002032329] [2023-01-28 09:00:26,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:00:26,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:00:26,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:00:26,309 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:00:26,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-01-28 09:00:26,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:00:26,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:00:26,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 09:00:26,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:00:26,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:00:26,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-01-28 09:00:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:26,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:00:26,969 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 09:00:26,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 09:00:27,002 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 09:00:27,003 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 40 treesize of output 56 [2023-01-28 09:00:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:27,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002032329] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:00:27,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:00:27,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 09:00:27,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346997081] [2023-01-28 09:00:27,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:00:27,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 09:00:27,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:00:27,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 09:00:27,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-01-28 09:00:27,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:00:27,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 874 transitions, 46759 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 09:00:27,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:00:27,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:00:27,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:00:30,857 INFO L130 PetriNetUnfolder]: 4065/7223 cut-off events. [2023-01-28 09:00:30,857 INFO L131 PetriNetUnfolder]: For 1029369/1029369 co-relation queries the response was YES. [2023-01-28 09:00:30,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156505 conditions, 7223 events. 4065/7223 cut-off events. For 1029369/1029369 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 53258 event pairs, 1528 based on Foata normal form. 4/7227 useless extension candidates. Maximal degree in co-relation 156276. Up to 6487 conditions per place. [2023-01-28 09:00:30,980 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 742 selfloop transitions, 146 changer transitions 2/890 dead transitions. [2023-01-28 09:00:30,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 890 transitions, 48654 flow [2023-01-28 09:00:30,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 09:00:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 09:00:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2015 transitions. [2023-01-28 09:00:30,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3433878663940014 [2023-01-28 09:00:30,982 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2015 transitions. [2023-01-28 09:00:30,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2015 transitions. [2023-01-28 09:00:30,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:00:30,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2015 transitions. [2023-01-28 09:00:30,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 167.91666666666666) internal successors, (2015), 12 states have internal predecessors, (2015), 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) [2023-01-28 09:00:30,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 09:00:30,985 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 09:00:30,985 INFO L175 Difference]: Start difference. First operand has 569 places, 874 transitions, 46759 flow. Second operand 12 states and 2015 transitions. [2023-01-28 09:00:30,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 890 transitions, 48654 flow [2023-01-28 09:00:35,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 890 transitions, 47709 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-01-28 09:00:35,507 INFO L231 Difference]: Finished difference. Result has 568 places, 874 transitions, 46114 flow [2023-01-28 09:00:35,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=45634, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=46114, PETRI_PLACES=568, PETRI_TRANSITIONS=874} [2023-01-28 09:00:35,507 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 545 predicate places. [2023-01-28 09:00:35,508 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 874 transitions, 46114 flow [2023-01-28 09:00:35,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 09:00:35,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:00:35,508 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:00:35,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-01-28 09:00:35,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:00:35,709 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:00:35,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:00:35,709 INFO L85 PathProgramCache]: Analyzing trace with hash 177218349, now seen corresponding path program 71 times [2023-01-28 09:00:35,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:00:35,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906504207] [2023-01-28 09:00:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:00:35,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:00:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:00:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:36,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:00:36,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906504207] [2023-01-28 09:00:36,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906504207] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:00:36,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387658327] [2023-01-28 09:00:36,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:00:36,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:00:36,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:00:36,206 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:00:36,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-01-28 09:00:36,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 09:00:36,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:00:36,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 09:00:36,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:00:36,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:00:36,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-01-28 09:00:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:36,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:00:36,841 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 09:00:36,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 09:00:36,884 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 09:00:36,884 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 40 treesize of output 56 [2023-01-28 09:00:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:36,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387658327] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:00:36,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:00:36,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 09:00:36,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814812859] [2023-01-28 09:00:36,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:00:36,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 09:00:36,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:00:36,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 09:00:36,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-01-28 09:00:36,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:00:36,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 874 transitions, 46114 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 09:00:36,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:00:36,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:00:36,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:00:40,531 INFO L130 PetriNetUnfolder]: 4051/7181 cut-off events. [2023-01-28 09:00:40,531 INFO L131 PetriNetUnfolder]: For 1006624/1006624 co-relation queries the response was YES. [2023-01-28 09:00:40,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153620 conditions, 7181 events. 4051/7181 cut-off events. For 1006624/1006624 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 52782 event pairs, 1526 based on Foata normal form. 4/7185 useless extension candidates. Maximal degree in co-relation 153388. Up to 6493 conditions per place. [2023-01-28 09:00:40,647 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 731 selfloop transitions, 144 changer transitions 2/877 dead transitions. [2023-01-28 09:00:40,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 877 transitions, 47563 flow [2023-01-28 09:00:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:00:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:00:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1513 transitions. [2023-01-28 09:00:40,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34378550329470575 [2023-01-28 09:00:40,648 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1513 transitions. [2023-01-28 09:00:40,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1513 transitions. [2023-01-28 09:00:40,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:00:40,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1513 transitions. [2023-01-28 09:00:40,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.11111111111111) internal successors, (1513), 9 states have internal predecessors, (1513), 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) [2023-01-28 09:00:40,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 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) [2023-01-28 09:00:40,651 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 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) [2023-01-28 09:00:40,651 INFO L175 Difference]: Start difference. First operand has 568 places, 874 transitions, 46114 flow. Second operand 9 states and 1513 transitions. [2023-01-28 09:00:40,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 877 transitions, 47563 flow [2023-01-28 09:00:45,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 877 transitions, 47250 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-01-28 09:00:45,128 INFO L231 Difference]: Finished difference. Result has 565 places, 869 transitions, 45738 flow [2023-01-28 09:00:45,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=45460, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=45738, PETRI_PLACES=565, PETRI_TRANSITIONS=869} [2023-01-28 09:00:45,128 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 542 predicate places. [2023-01-28 09:00:45,129 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 869 transitions, 45738 flow [2023-01-28 09:00:45,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 09:00:45,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:00:45,129 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:00:45,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2023-01-28 09:00:45,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-01-28 09:00:45,330 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:00:45,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:00:45,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1468189613, now seen corresponding path program 72 times [2023-01-28 09:00:45,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:00:45,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550791647] [2023-01-28 09:00:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:00:45,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:00:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:00:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:45,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:00:45,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550791647] [2023-01-28 09:00:45,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550791647] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:00:45,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594868927] [2023-01-28 09:00:45,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:00:45,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:00:45,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:00:45,898 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:00:45,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-01-28 09:00:46,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 09:00:46,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:00:46,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 09:00:46,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:00:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:46,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:00:46,617 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 09:00:46,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 09:00:46,654 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 09:00:46,654 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 40 treesize of output 56 [2023-01-28 09:00:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:46,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594868927] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:00:46,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:00:46,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 09:00:46,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125752280] [2023-01-28 09:00:46,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:00:46,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 09:00:46,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:00:46,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 09:00:46,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-01-28 09:00:46,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:00:46,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 869 transitions, 45738 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 09:00:46,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:00:46,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:00:46,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:00:50,145 INFO L130 PetriNetUnfolder]: 4037/7139 cut-off events. [2023-01-28 09:00:50,145 INFO L131 PetriNetUnfolder]: For 1000192/1000192 co-relation queries the response was YES. [2023-01-28 09:00:50,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152730 conditions, 7139 events. 4037/7139 cut-off events. For 1000192/1000192 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 52249 event pairs, 1540 based on Foata normal form. 4/7143 useless extension candidates. Maximal degree in co-relation 152498. Up to 6483 conditions per place. [2023-01-28 09:00:50,359 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 739 selfloop transitions, 132 changer transitions 5/876 dead transitions. [2023-01-28 09:00:50,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 876 transitions, 47526 flow [2023-01-28 09:00:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:00:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:00:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1510 transitions. [2023-01-28 09:00:50,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310384003635536 [2023-01-28 09:00:50,360 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1510 transitions. [2023-01-28 09:00:50,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1510 transitions. [2023-01-28 09:00:50,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:00:50,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1510 transitions. [2023-01-28 09:00:50,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.77777777777777) internal successors, (1510), 9 states have internal predecessors, (1510), 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) [2023-01-28 09:00:50,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 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) [2023-01-28 09:00:50,363 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 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) [2023-01-28 09:00:50,363 INFO L175 Difference]: Start difference. First operand has 565 places, 869 transitions, 45738 flow. Second operand 9 states and 1510 transitions. [2023-01-28 09:00:50,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 876 transitions, 47526 flow [2023-01-28 09:00:54,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 876 transitions, 47238 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-01-28 09:00:54,745 INFO L231 Difference]: Finished difference. Result has 565 places, 866 transitions, 45572 flow [2023-01-28 09:00:54,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=45450, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=45572, PETRI_PLACES=565, PETRI_TRANSITIONS=866} [2023-01-28 09:00:54,746 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 542 predicate places. [2023-01-28 09:00:54,746 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 866 transitions, 45572 flow [2023-01-28 09:00:54,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 09:00:54,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:00:54,747 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:00:54,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-01-28 09:00:54,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:00:54,949 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:00:54,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:00:54,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1752633449, now seen corresponding path program 73 times [2023-01-28 09:00:54,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:00:54,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039880479] [2023-01-28 09:00:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:00:54,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:00:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:00:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:55,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:00:55,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039880479] [2023-01-28 09:00:55,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039880479] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:00:55,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744199099] [2023-01-28 09:00:55,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:00:55,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:00:55,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:00:55,389 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:00:55,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-01-28 09:00:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:00:55,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 09:00:55,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:00:55,909 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 09:00:55,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2023-01-28 09:00:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:55,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:00:56,066 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 09:00:56,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 09:00:56,102 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 09:00:56,102 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 40 treesize of output 56 [2023-01-28 09:00:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:00:56,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744199099] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:00:56,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:00:56,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-01-28 09:00:56,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081937990] [2023-01-28 09:00:56,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:00:56,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 09:00:56,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:00:56,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 09:00:56,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-01-28 09:00:56,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:00:56,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 866 transitions, 45572 flow. Second operand has 18 states, 18 states have (on average 165.44444444444446) internal successors, (2978), 18 states have internal predecessors, (2978), 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) [2023-01-28 09:00:56,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:00:56,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:00:56,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:00:59,566 INFO L130 PetriNetUnfolder]: 4053/7139 cut-off events. [2023-01-28 09:00:59,566 INFO L131 PetriNetUnfolder]: For 995885/995885 co-relation queries the response was YES. [2023-01-28 09:00:59,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152783 conditions, 7139 events. 4053/7139 cut-off events. For 995885/995885 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 52036 event pairs, 1494 based on Foata normal form. 12/7151 useless extension candidates. Maximal degree in co-relation 152550. Up to 6363 conditions per place. [2023-01-28 09:00:59,675 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 737 selfloop transitions, 153 changer transitions 0/890 dead transitions. [2023-01-28 09:00:59,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 890 transitions, 47675 flow [2023-01-28 09:00:59,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 09:00:59,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 09:00:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1686 transitions. [2023-01-28 09:00:59,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34478527607361964 [2023-01-28 09:00:59,677 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1686 transitions. [2023-01-28 09:00:59,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1686 transitions. [2023-01-28 09:00:59,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:00:59,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1686 transitions. [2023-01-28 09:00:59,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.6) internal successors, (1686), 10 states have internal predecessors, (1686), 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) [2023-01-28 09:00:59,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 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) [2023-01-28 09:00:59,680 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 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) [2023-01-28 09:00:59,680 INFO L175 Difference]: Start difference. First operand has 565 places, 866 transitions, 45572 flow. Second operand 10 states and 1686 transitions. [2023-01-28 09:00:59,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 890 transitions, 47675 flow [2023-01-28 09:01:04,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 890 transitions, 47362 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-01-28 09:01:04,103 INFO L231 Difference]: Finished difference. Result has 560 places, 871 transitions, 45507 flow [2023-01-28 09:01:04,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44916, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=45507, PETRI_PLACES=560, PETRI_TRANSITIONS=871} [2023-01-28 09:01:04,104 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 537 predicate places. [2023-01-28 09:01:04,104 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 871 transitions, 45507 flow [2023-01-28 09:01:04,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 165.44444444444446) internal successors, (2978), 18 states have internal predecessors, (2978), 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) [2023-01-28 09:01:04,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:01:04,105 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:01:04,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-01-28 09:01:04,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:01:04,305 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:01:04,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:01:04,306 INFO L85 PathProgramCache]: Analyzing trace with hash -17067263, now seen corresponding path program 74 times [2023-01-28 09:01:04,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:01:04,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802591455] [2023-01-28 09:01:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:01:04,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:01:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:01:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:01:04,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:01:04,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802591455] [2023-01-28 09:01:04,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802591455] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:01:04,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130919276] [2023-01-28 09:01:04,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:01:04,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:01:04,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:01:04,876 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:01:04,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-01-28 09:01:05,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:01:05,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:01:05,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 68 conjunts are in the unsatisfiable core [2023-01-28 09:01:05,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:01:05,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 09:01:05,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 09:01:05,504 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 09:01:05,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-01-28 09:01:05,684 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 09:01:05,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 09:01:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:01:05,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:01:06,020 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-28 09:01:06,020 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 86 treesize of output 107 [2023-01-28 09:01:06,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:01:06,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-01-28 09:01:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:01:06,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130919276] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:01:06,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:01:06,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 35 [2023-01-28 09:01:06,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937199901] [2023-01-28 09:01:06,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:01:06,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-28 09:01:06,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:01:06,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-28 09:01:06,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1103, Unknown=4, NotChecked=0, Total=1260 [2023-01-28 09:01:06,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 489 [2023-01-28 09:01:06,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 871 transitions, 45507 flow. Second operand has 36 states, 36 states have (on average 153.72222222222223) internal successors, (5534), 36 states have internal predecessors, (5534), 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) [2023-01-28 09:01:06,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:01:06,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 489 [2023-01-28 09:01:06,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:01:11,583 INFO L130 PetriNetUnfolder]: 4859/8521 cut-off events. [2023-01-28 09:01:11,583 INFO L131 PetriNetUnfolder]: For 1086238/1086238 co-relation queries the response was YES. [2023-01-28 09:01:11,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177876 conditions, 8521 events. 4859/8521 cut-off events. For 1086238/1086238 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 63125 event pairs, 167 based on Foata normal form. 68/8589 useless extension candidates. Maximal degree in co-relation 177644. Up to 2556 conditions per place. [2023-01-28 09:01:11,716 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 611 selfloop transitions, 509 changer transitions 6/1126 dead transitions. [2023-01-28 09:01:11,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 1126 transitions, 56360 flow [2023-01-28 09:01:11,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 09:01:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 09:01:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3466 transitions. [2023-01-28 09:01:11,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3221788436512363 [2023-01-28 09:01:11,718 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3466 transitions. [2023-01-28 09:01:11,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3466 transitions. [2023-01-28 09:01:11,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:01:11,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3466 transitions. [2023-01-28 09:01:11,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 157.54545454545453) internal successors, (3466), 22 states have internal predecessors, (3466), 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) [2023-01-28 09:01:11,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 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) [2023-01-28 09:01:11,724 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 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) [2023-01-28 09:01:11,724 INFO L175 Difference]: Start difference. First operand has 560 places, 871 transitions, 45507 flow. Second operand 22 states and 3466 transitions. [2023-01-28 09:01:11,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 1126 transitions, 56360 flow [2023-01-28 09:01:17,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 1126 transitions, 55958 flow, removed 52 selfloop flow, removed 8 redundant places. [2023-01-28 09:01:17,527 INFO L231 Difference]: Finished difference. Result has 575 places, 940 transitions, 49718 flow [2023-01-28 09:01:17,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44411, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=49718, PETRI_PLACES=575, PETRI_TRANSITIONS=940} [2023-01-28 09:01:17,528 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 552 predicate places. [2023-01-28 09:01:17,528 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 940 transitions, 49718 flow [2023-01-28 09:01:17,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 153.72222222222223) internal successors, (5534), 36 states have internal predecessors, (5534), 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) [2023-01-28 09:01:17,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:01:17,529 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:01:17,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2023-01-28 09:01:17,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:01:17,737 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:01:17,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:01:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash -820245903, now seen corresponding path program 75 times [2023-01-28 09:01:17,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:01:17,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376907869] [2023-01-28 09:01:17,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:01:17,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:01:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:01:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:01:18,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:01:18,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376907869] [2023-01-28 09:01:18,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376907869] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:01:18,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580151666] [2023-01-28 09:01:18,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:01:18,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:01:18,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:01:18,321 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:01:18,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-01-28 09:01:18,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 09:01:18,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:01:18,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-28 09:01:18,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:01:18,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 09:01:18,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 09:01:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:01:19,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:01:19,330 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5644 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_5644))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)) (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)))))) is different from false [2023-01-28 09:01:19,379 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-28 09:01:19,379 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 114 treesize of output 127 [2023-01-28 09:01:19,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:01:19,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 88 [2023-01-28 09:01:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:01:19,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580151666] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:01:19,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:01:19,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2023-01-28 09:01:19,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860068079] [2023-01-28 09:01:19,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:01:19,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 09:01:19,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:01:19,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 09:01:19,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=862, Unknown=1, NotChecked=60, Total=1056 [2023-01-28 09:01:19,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-01-28 09:01:19,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 940 transitions, 49718 flow. Second operand has 33 states, 33 states have (on average 157.72727272727272) internal successors, (5205), 33 states have internal predecessors, (5205), 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) [2023-01-28 09:01:19,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:01:19,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-01-28 09:01:19,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:01:27,198 INFO L130 PetriNetUnfolder]: 5659/9933 cut-off events. [2023-01-28 09:01:27,198 INFO L131 PetriNetUnfolder]: For 1332086/1332086 co-relation queries the response was YES. [2023-01-28 09:01:27,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210315 conditions, 9933 events. 5659/9933 cut-off events. For 1332086/1332086 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 75435 event pairs, 393 based on Foata normal form. 64/9997 useless extension candidates. Maximal degree in co-relation 210072. Up to 3158 conditions per place. [2023-01-28 09:01:27,361 INFO L137 encePairwiseOnDemand]: 476/489 looper letters, 491 selfloop transitions, 700 changer transitions 1/1192 dead transitions. [2023-01-28 09:01:27,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 1192 transitions, 62325 flow [2023-01-28 09:01:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 09:01:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 09:01:27,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4195 transitions. [2023-01-28 09:01:27,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3299512348592103 [2023-01-28 09:01:27,364 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4195 transitions. [2023-01-28 09:01:27,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4195 transitions. [2023-01-28 09:01:27,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:01:27,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4195 transitions. [2023-01-28 09:01:27,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 161.34615384615384) internal successors, (4195), 26 states have internal predecessors, (4195), 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) [2023-01-28 09:01:27,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 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) [2023-01-28 09:01:27,371 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 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) [2023-01-28 09:01:27,371 INFO L175 Difference]: Start difference. First operand has 575 places, 940 transitions, 49718 flow. Second operand 26 states and 4195 transitions. [2023-01-28 09:01:27,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 1192 transitions, 62325 flow [2023-01-28 09:01:36,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 1192 transitions, 59774 flow, removed 770 selfloop flow, removed 16 redundant places. [2023-01-28 09:01:36,598 INFO L231 Difference]: Finished difference. Result has 593 places, 1088 transitions, 57329 flow [2023-01-28 09:01:36,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=48250, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=566, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=57329, PETRI_PLACES=593, PETRI_TRANSITIONS=1088} [2023-01-28 09:01:36,599 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 570 predicate places. [2023-01-28 09:01:36,599 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 1088 transitions, 57329 flow [2023-01-28 09:01:36,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 157.72727272727272) internal successors, (5205), 33 states have internal predecessors, (5205), 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) [2023-01-28 09:01:36,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:01:36,600 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:01:36,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2023-01-28 09:01:36,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2023-01-28 09:01:36,801 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:01:36,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:01:36,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1446204295, now seen corresponding path program 76 times [2023-01-28 09:01:36,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:01:36,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059964799] [2023-01-28 09:01:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:01:36,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:01:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:01:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:01:37,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:01:37,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059964799] [2023-01-28 09:01:37,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059964799] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:01:37,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078391547] [2023-01-28 09:01:37,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:01:37,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:01:37,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:01:37,258 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:01:37,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-01-28 09:01:37,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:01:37,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:01:37,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 09:01:37,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:01:37,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:01:37,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-01-28 09:01:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:01:37,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:01:37,947 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 09:01:37,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 09:01:37,984 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 09:01:37,984 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 40 treesize of output 56 [2023-01-28 09:01:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:01:38,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078391547] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:01:38,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:01:38,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 09:01:38,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782287013] [2023-01-28 09:01:38,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:01:38,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 09:01:38,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:01:38,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 09:01:38,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-01-28 09:01:38,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:01:38,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 1088 transitions, 57329 flow. Second operand has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 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) [2023-01-28 09:01:38,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:01:38,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:01:38,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:01:44,080 INFO L130 PetriNetUnfolder]: 5709/10047 cut-off events. [2023-01-28 09:01:44,080 INFO L131 PetriNetUnfolder]: For 1412096/1412096 co-relation queries the response was YES. [2023-01-28 09:01:44,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214467 conditions, 10047 events. 5709/10047 cut-off events. For 1412096/1412096 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 76859 event pairs, 1940 based on Foata normal form. 12/10059 useless extension candidates. Maximal degree in co-relation 214218. Up to 8919 conditions per place. [2023-01-28 09:01:44,374 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 979 selfloop transitions, 157 changer transitions 3/1139 dead transitions. [2023-01-28 09:01:44,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 1139 transitions, 60596 flow [2023-01-28 09:01:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 09:01:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 09:01:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3024 transitions. [2023-01-28 09:01:44,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34355828220858897 [2023-01-28 09:01:44,377 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3024 transitions. [2023-01-28 09:01:44,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3024 transitions. [2023-01-28 09:01:44,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:01:44,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3024 transitions. [2023-01-28 09:01:44,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 168.0) internal successors, (3024), 18 states have internal predecessors, (3024), 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) [2023-01-28 09:01:44,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 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) [2023-01-28 09:01:44,383 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 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) [2023-01-28 09:01:44,383 INFO L175 Difference]: Start difference. First operand has 593 places, 1088 transitions, 57329 flow. Second operand 18 states and 3024 transitions. [2023-01-28 09:01:44,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 1139 transitions, 60596 flow [2023-01-28 09:01:54,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 1139 transitions, 59403 flow, removed 301 selfloop flow, removed 12 redundant places. [2023-01-28 09:01:54,421 INFO L231 Difference]: Finished difference. Result has 604 places, 1098 transitions, 57259 flow [2023-01-28 09:01:54,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=55883, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1085, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=931, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=57259, PETRI_PLACES=604, PETRI_TRANSITIONS=1098} [2023-01-28 09:01:54,422 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 581 predicate places. [2023-01-28 09:01:54,422 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 1098 transitions, 57259 flow [2023-01-28 09:01:54,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 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) [2023-01-28 09:01:54,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:01:54,423 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:01:54,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-01-28 09:01:54,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:01:54,624 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:01:54,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:01:54,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1127926289, now seen corresponding path program 77 times [2023-01-28 09:01:54,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:01:54,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49596919] [2023-01-28 09:01:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:01:54,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:01:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:01:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:01:55,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:01:55,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49596919] [2023-01-28 09:01:55,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49596919] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:01:55,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803553043] [2023-01-28 09:01:55,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:01:55,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:01:55,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:01:55,249 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:01:55,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-01-28 09:01:55,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 09:01:55,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:01:55,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-28 09:01:55,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:01:55,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 09:01:55,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 09:01:55,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:01:55,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2023-01-28 09:01:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:01:55,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:01:56,177 WARN L839 $PredicateComparison]: unable to prove that (forall ((~o_2~0.offset Int) (v_ArrVal_5785 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_5785))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) ~o_2~0.offset)))) (= (select .cse0 ~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)))))) is different from false [2023-01-28 09:01:56,222 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-28 09:01:56,222 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 114 treesize of output 127 [2023-01-28 09:01:56,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:01:56,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 88 [2023-01-28 09:01:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:01:56,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803553043] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:01:56,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:01:56,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 30 [2023-01-28 09:01:56,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299608301] [2023-01-28 09:01:56,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:01:56,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 09:01:56,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:01:56,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 09:01:56,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=767, Unknown=1, NotChecked=56, Total=930 [2023-01-28 09:01:56,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-01-28 09:01:56,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 1098 transitions, 57259 flow. Second operand has 31 states, 31 states have (on average 157.93548387096774) internal successors, (4896), 31 states have internal predecessors, (4896), 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) [2023-01-28 09:01:56,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:01:56,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-01-28 09:01:56,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:02:02,752 INFO L130 PetriNetUnfolder]: 5759/10165 cut-off events. [2023-01-28 09:02:02,753 INFO L131 PetriNetUnfolder]: For 1425873/1425873 co-relation queries the response was YES. [2023-01-28 09:02:02,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214805 conditions, 10165 events. 5759/10165 cut-off events. For 1425873/1425873 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 78174 event pairs, 2116 based on Foata normal form. 36/10201 useless extension candidates. Maximal degree in co-relation 214554. Up to 9283 conditions per place. [2023-01-28 09:02:02,921 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 938 selfloop transitions, 192 changer transitions 1/1131 dead transitions. [2023-01-28 09:02:02,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1131 transitions, 60399 flow [2023-01-28 09:02:02,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 09:02:02,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 09:02:02,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2257 transitions. [2023-01-28 09:02:02,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296815658778849 [2023-01-28 09:02:02,923 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2257 transitions. [2023-01-28 09:02:02,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2257 transitions. [2023-01-28 09:02:02,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:02:02,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2257 transitions. [2023-01-28 09:02:02,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.21428571428572) internal successors, (2257), 14 states have internal predecessors, (2257), 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) [2023-01-28 09:02:02,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 09:02:02,928 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 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) [2023-01-28 09:02:02,928 INFO L175 Difference]: Start difference. First operand has 604 places, 1098 transitions, 57259 flow. Second operand 14 states and 2257 transitions. [2023-01-28 09:02:02,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1131 transitions, 60399 flow [2023-01-28 09:02:13,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1131 transitions, 59847 flow, removed 201 selfloop flow, removed 6 redundant places. [2023-01-28 09:02:13,167 INFO L231 Difference]: Finished difference. Result has 610 places, 1102 transitions, 57466 flow [2023-01-28 09:02:13,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=56695, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1097, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=905, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=57466, PETRI_PLACES=610, PETRI_TRANSITIONS=1102} [2023-01-28 09:02:13,168 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 587 predicate places. [2023-01-28 09:02:13,168 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 1102 transitions, 57466 flow [2023-01-28 09:02:13,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 157.93548387096774) internal successors, (4896), 31 states have internal predecessors, (4896), 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) [2023-01-28 09:02:13,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:02:13,169 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:02:13,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2023-01-28 09:02:13,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:02:13,369 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:02:13,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:02:13,370 INFO L85 PathProgramCache]: Analyzing trace with hash 755323215, now seen corresponding path program 78 times [2023-01-28 09:02:13,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:02:13,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817465181] [2023-01-28 09:02:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:02:13,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:02:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:02:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:02:13,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:02:13,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817465181] [2023-01-28 09:02:13,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817465181] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:02:13,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534814103] [2023-01-28 09:02:13,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:02:13,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:02:13,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:02:13,952 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:02:13,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-01-28 09:02:14,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 09:02:14,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:02:14,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-28 09:02:14,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:02:14,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:02:14,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 09:02:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:02:14,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:02:14,857 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-01-28 09:02:14,857 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 63 treesize of output 67 [2023-01-28 09:02:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:02:14,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534814103] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:02:14,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:02:14,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2023-01-28 09:02:14,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970920589] [2023-01-28 09:02:14,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:02:14,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 09:02:14,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:02:14,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 09:02:14,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2023-01-28 09:02:14,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:02:14,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 1102 transitions, 57466 flow. Second operand has 26 states, 26 states have (on average 164.80769230769232) internal successors, (4285), 26 states have internal predecessors, (4285), 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) [2023-01-28 09:02:14,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:02:14,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:02:14,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:02:21,495 INFO L130 PetriNetUnfolder]: 5811/10289 cut-off events. [2023-01-28 09:02:21,495 INFO L131 PetriNetUnfolder]: For 1401630/1401630 co-relation queries the response was YES. [2023-01-28 09:02:21,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217330 conditions, 10289 events. 5811/10289 cut-off events. For 1401630/1401630 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 79639 event pairs, 580 based on Foata normal form. 36/10325 useless extension candidates. Maximal degree in co-relation 217074. Up to 3389 conditions per place. [2023-01-28 09:02:21,676 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 234 selfloop transitions, 931 changer transitions 1/1166 dead transitions. [2023-01-28 09:02:21,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 1166 transitions, 61258 flow [2023-01-28 09:02:21,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 09:02:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 09:02:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2701 transitions. [2023-01-28 09:02:21,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345219836400818 [2023-01-28 09:02:21,678 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2701 transitions. [2023-01-28 09:02:21,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2701 transitions. [2023-01-28 09:02:21,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:02:21,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2701 transitions. [2023-01-28 09:02:21,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 168.8125) internal successors, (2701), 16 states have internal predecessors, (2701), 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) [2023-01-28 09:02:21,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 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) [2023-01-28 09:02:21,683 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 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) [2023-01-28 09:02:21,683 INFO L175 Difference]: Start difference. First operand has 610 places, 1102 transitions, 57466 flow. Second operand 16 states and 2701 transitions. [2023-01-28 09:02:21,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 1166 transitions, 61258 flow [2023-01-28 09:02:32,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 1166 transitions, 60749 flow, removed 71 selfloop flow, removed 9 redundant places. [2023-01-28 09:02:32,351 INFO L231 Difference]: Finished difference. Result has 620 places, 1113 transitions, 59762 flow [2023-01-28 09:02:32,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=56952, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=919, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=59762, PETRI_PLACES=620, PETRI_TRANSITIONS=1113} [2023-01-28 09:02:32,352 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 597 predicate places. [2023-01-28 09:02:32,352 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 1113 transitions, 59762 flow [2023-01-28 09:02:32,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 164.80769230769232) internal successors, (4285), 26 states have internal predecessors, (4285), 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) [2023-01-28 09:02:32,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:02:32,352 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:02:32,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2023-01-28 09:02:32,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2023-01-28 09:02:32,553 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:02:32,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:02:32,553 INFO L85 PathProgramCache]: Analyzing trace with hash 674945455, now seen corresponding path program 79 times [2023-01-28 09:02:32,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:02:32,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755158411] [2023-01-28 09:02:32,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:02:32,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:02:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:02:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:02:33,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:02:33,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755158411] [2023-01-28 09:02:33,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755158411] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:02:33,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235016806] [2023-01-28 09:02:33,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:02:33,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:02:33,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:02:33,032 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:02:33,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-01-28 09:02:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:02:33,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 09:02:33,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:02:33,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:02:33,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 09:02:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:02:33,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:02:33,668 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 09:02:33,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 09:02:33,703 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 09:02:33,703 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 40 treesize of output 56 [2023-01-28 09:02:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:02:33,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235016806] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:02:33,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:02:33,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-01-28 09:02:33,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305588399] [2023-01-28 09:02:33,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:02:33,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 09:02:33,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:02:33,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 09:02:33,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-01-28 09:02:33,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:02:33,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 1113 transitions, 59762 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 09:02:33,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:02:33,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:02:33,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:02:40,203 INFO L130 PetriNetUnfolder]: 5863/10413 cut-off events. [2023-01-28 09:02:40,203 INFO L131 PetriNetUnfolder]: For 1449359/1449359 co-relation queries the response was YES. [2023-01-28 09:02:40,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224428 conditions, 10413 events. 5863/10413 cut-off events. For 1449359/1449359 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 81016 event pairs, 2046 based on Foata normal form. 36/10449 useless extension candidates. Maximal degree in co-relation 224170. Up to 9365 conditions per place. [2023-01-28 09:02:40,384 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1002 selfloop transitions, 147 changer transitions 0/1149 dead transitions. [2023-01-28 09:02:40,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1149 transitions, 63054 flow [2023-01-28 09:02:40,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 09:02:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 09:02:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2189 transitions. [2023-01-28 09:02:40,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34434481673745476 [2023-01-28 09:02:40,386 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2189 transitions. [2023-01-28 09:02:40,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2189 transitions. [2023-01-28 09:02:40,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:02:40,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2189 transitions. [2023-01-28 09:02:40,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.3846153846154) internal successors, (2189), 13 states have internal predecessors, (2189), 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) [2023-01-28 09:02:40,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 09:02:40,390 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 09:02:40,390 INFO L175 Difference]: Start difference. First operand has 620 places, 1113 transitions, 59762 flow. Second operand 13 states and 2189 transitions. [2023-01-28 09:02:40,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1149 transitions, 63054 flow [2023-01-28 09:02:51,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 1149 transitions, 62067 flow, removed 190 selfloop flow, removed 7 redundant places. [2023-01-28 09:02:51,179 INFO L231 Difference]: Finished difference. Result has 629 places, 1119 transitions, 59571 flow [2023-01-28 09:02:51,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=58782, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=59571, PETRI_PLACES=629, PETRI_TRANSITIONS=1119} [2023-01-28 09:02:51,180 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 606 predicate places. [2023-01-28 09:02:51,180 INFO L495 AbstractCegarLoop]: Abstraction has has 629 places, 1119 transitions, 59571 flow [2023-01-28 09:02:51,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 09:02:51,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:02:51,181 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:02:51,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-01-28 09:02:51,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:02:51,381 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:02:51,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:02:51,381 INFO L85 PathProgramCache]: Analyzing trace with hash -962313925, now seen corresponding path program 80 times [2023-01-28 09:02:51,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:02:51,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629087488] [2023-01-28 09:02:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:02:51,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:02:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:02:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:02:51,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:02:51,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629087488] [2023-01-28 09:02:51,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629087488] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:02:51,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404178877] [2023-01-28 09:02:51,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:02:51,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:02:51,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:02:51,934 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:02:51,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-01-28 09:02:52,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:02:52,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:02:52,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 09:02:52,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:02:52,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:02:52,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 35 [2023-01-28 09:02:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:02:52,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:02:52,713 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-28 09:02:52,713 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 71 treesize of output 88 [2023-01-28 09:02:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:02:52,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404178877] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:02:52,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:02:52,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-01-28 09:02:52,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843622542] [2023-01-28 09:02:52,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:02:52,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 09:02:52,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:02:52,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 09:02:52,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-01-28 09:02:52,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:02:52,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 629 places, 1119 transitions, 59571 flow. Second operand has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 09:02:52,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:02:52,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:02:52,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:02:58,942 INFO L130 PetriNetUnfolder]: 5915/10537 cut-off events. [2023-01-28 09:02:58,943 INFO L131 PetriNetUnfolder]: For 1469428/1469428 co-relation queries the response was YES. [2023-01-28 09:02:59,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226267 conditions, 10537 events. 5915/10537 cut-off events. For 1469428/1469428 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 82417 event pairs, 2066 based on Foata normal form. 36/10573 useless extension candidates. Maximal degree in co-relation 226004. Up to 9467 conditions per place. [2023-01-28 09:02:59,132 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 992 selfloop transitions, 152 changer transitions 0/1144 dead transitions. [2023-01-28 09:02:59,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 1144 transitions, 62546 flow [2023-01-28 09:02:59,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 09:02:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 09:02:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1688 transitions. [2023-01-28 09:02:59,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34519427402862984 [2023-01-28 09:02:59,134 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1688 transitions. [2023-01-28 09:02:59,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1688 transitions. [2023-01-28 09:02:59,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:02:59,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1688 transitions. [2023-01-28 09:02:59,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.8) internal successors, (1688), 10 states have internal predecessors, (1688), 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) [2023-01-28 09:02:59,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 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) [2023-01-28 09:02:59,137 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 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) [2023-01-28 09:02:59,137 INFO L175 Difference]: Start difference. First operand has 629 places, 1119 transitions, 59571 flow. Second operand 10 states and 1688 transitions. [2023-01-28 09:02:59,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 1144 transitions, 62546 flow [2023-01-28 09:03:10,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 1144 transitions, 61970 flow, removed 154 selfloop flow, removed 6 redundant places. [2023-01-28 09:03:10,641 INFO L231 Difference]: Finished difference. Result has 633 places, 1122 transitions, 59598 flow [2023-01-28 09:03:10,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=58986, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=59598, PETRI_PLACES=633, PETRI_TRANSITIONS=1122} [2023-01-28 09:03:10,643 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 610 predicate places. [2023-01-28 09:03:10,643 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 1122 transitions, 59598 flow [2023-01-28 09:03:10,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.15) internal successors, (3303), 20 states have internal predecessors, (3303), 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) [2023-01-28 09:03:10,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:03:10,644 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:03:10,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2023-01-28 09:03:10,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:03:10,851 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:03:10,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:03:10,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1841885797, now seen corresponding path program 81 times [2023-01-28 09:03:10,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:03:10,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333963067] [2023-01-28 09:03:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:03:10,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:03:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:03:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:03:11,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:03:11,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333963067] [2023-01-28 09:03:11,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333963067] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:03:11,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582657928] [2023-01-28 09:03:11,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:03:11,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:03:11,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:03:11,391 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:03:11,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-01-28 09:03:11,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 09:03:11,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:03:11,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-28 09:03:11,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:03:11,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:03:11,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-01-28 09:03:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:03:11,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:03:12,165 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-01-28 09:03:12,166 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 63 treesize of output 67 [2023-01-28 09:03:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:03:12,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582657928] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:03:12,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:03:12,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2023-01-28 09:03:12,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251360948] [2023-01-28 09:03:12,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:03:12,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 09:03:12,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:03:12,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 09:03:12,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-01-28 09:03:12,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:03:12,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 1122 transitions, 59598 flow. Second operand has 22 states, 22 states have (on average 165.04545454545453) internal successors, (3631), 22 states have internal predecessors, (3631), 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) [2023-01-28 09:03:12,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:03:12,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:03:12,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:03:18,455 INFO L130 PetriNetUnfolder]: 5915/10547 cut-off events. [2023-01-28 09:03:18,455 INFO L131 PetriNetUnfolder]: For 1439664/1439664 co-relation queries the response was YES. [2023-01-28 09:03:18,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225830 conditions, 10547 events. 5915/10547 cut-off events. For 1439664/1439664 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 82805 event pairs, 488 based on Foata normal form. 4/10551 useless extension candidates. Maximal degree in co-relation 225566. Up to 3453 conditions per place. [2023-01-28 09:03:18,631 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 201 selfloop transitions, 974 changer transitions 12/1187 dead transitions. [2023-01-28 09:03:18,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 1187 transitions, 64251 flow [2023-01-28 09:03:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 09:03:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 09:03:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2183 transitions. [2023-01-28 09:03:18,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34340097530281577 [2023-01-28 09:03:18,633 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2183 transitions. [2023-01-28 09:03:18,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2183 transitions. [2023-01-28 09:03:18,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:03:18,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2183 transitions. [2023-01-28 09:03:18,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 167.92307692307693) internal successors, (2183), 13 states have internal predecessors, (2183), 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) [2023-01-28 09:03:18,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 09:03:18,637 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 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) [2023-01-28 09:03:18,637 INFO L175 Difference]: Start difference. First operand has 633 places, 1122 transitions, 59598 flow. Second operand 13 states and 2183 transitions. [2023-01-28 09:03:18,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 1187 transitions, 64251 flow [2023-01-28 09:03:29,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 1187 transitions, 63811 flow, removed 78 selfloop flow, removed 6 redundant places. [2023-01-28 09:03:29,838 INFO L231 Difference]: Finished difference. Result has 639 places, 1137 transitions, 62515 flow [2023-01-28 09:03:29,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=59158, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=955, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=62515, PETRI_PLACES=639, PETRI_TRANSITIONS=1137} [2023-01-28 09:03:29,838 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 616 predicate places. [2023-01-28 09:03:29,839 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 1137 transitions, 62515 flow [2023-01-28 09:03:29,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 165.04545454545453) internal successors, (3631), 22 states have internal predecessors, (3631), 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) [2023-01-28 09:03:29,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:03:29,839 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:03:29,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2023-01-28 09:03:30,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-01-28 09:03:30,040 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:03:30,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:03:30,040 INFO L85 PathProgramCache]: Analyzing trace with hash 243108279, now seen corresponding path program 82 times [2023-01-28 09:03:30,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:03:30,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453761011] [2023-01-28 09:03:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:03:30,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:03:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:03:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:03:30,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:03:30,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453761011] [2023-01-28 09:03:30,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453761011] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:03:30,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119768505] [2023-01-28 09:03:30,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:03:30,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:03:30,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:03:30,547 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:03:30,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-01-28 09:03:30,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:03:30,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:03:30,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 09:03:30,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:03:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:03:31,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:03:31,233 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-01-28 09:03:31,233 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 63 treesize of output 67 [2023-01-28 09:03:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:03:31,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119768505] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:03:31,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:03:31,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-28 09:03:31,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539910153] [2023-01-28 09:03:31,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:03:31,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 09:03:31,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:03:31,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 09:03:31,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-01-28 09:03:31,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:03:31,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 1137 transitions, 62515 flow. Second operand has 22 states, 22 states have (on average 165.0) internal successors, (3630), 22 states have internal predecessors, (3630), 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) [2023-01-28 09:03:31,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:03:31,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:03:31,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:03:37,388 INFO L130 PetriNetUnfolder]: 5905/10525 cut-off events. [2023-01-28 09:03:37,389 INFO L131 PetriNetUnfolder]: For 1461362/1461362 co-relation queries the response was YES. [2023-01-28 09:03:37,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229540 conditions, 10525 events. 5905/10525 cut-off events. For 1461362/1461362 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 82399 event pairs, 1326 based on Foata normal form. 4/10529 useless extension candidates. Maximal degree in co-relation 229276. Up to 6283 conditions per place. [2023-01-28 09:03:37,573 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 717 selfloop transitions, 432 changer transitions 9/1158 dead transitions. [2023-01-28 09:03:37,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 1158 transitions, 65100 flow [2023-01-28 09:03:37,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:03:37,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:03:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1518 transitions. [2023-01-28 09:03:37,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3449216087252897 [2023-01-28 09:03:37,575 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1518 transitions. [2023-01-28 09:03:37,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1518 transitions. [2023-01-28 09:03:37,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:03:37,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1518 transitions. [2023-01-28 09:03:37,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.66666666666666) internal successors, (1518), 9 states have internal predecessors, (1518), 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) [2023-01-28 09:03:37,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 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) [2023-01-28 09:03:37,578 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 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) [2023-01-28 09:03:37,578 INFO L175 Difference]: Start difference. First operand has 639 places, 1137 transitions, 62515 flow. Second operand 9 states and 1518 transitions. [2023-01-28 09:03:37,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 1158 transitions, 65100 flow [2023-01-28 09:03:49,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 1158 transitions, 63849 flow, removed 38 selfloop flow, removed 8 redundant places. [2023-01-28 09:03:49,948 INFO L231 Difference]: Finished difference. Result has 637 places, 1132 transitions, 61904 flow [2023-01-28 09:03:49,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=61264, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=432, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=61904, PETRI_PLACES=637, PETRI_TRANSITIONS=1132} [2023-01-28 09:03:49,949 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 614 predicate places. [2023-01-28 09:03:49,949 INFO L495 AbstractCegarLoop]: Abstraction has has 637 places, 1132 transitions, 61904 flow [2023-01-28 09:03:49,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 165.0) internal successors, (3630), 22 states have internal predecessors, (3630), 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) [2023-01-28 09:03:49,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:03:49,949 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:03:49,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2023-01-28 09:03:50,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:03:50,150 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:03:50,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:03:50,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1525644689, now seen corresponding path program 83 times [2023-01-28 09:03:50,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:03:50,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089133514] [2023-01-28 09:03:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:03:50,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:03:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:03:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:03:50,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:03:50,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089133514] [2023-01-28 09:03:50,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089133514] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:03:50,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693950364] [2023-01-28 09:03:50,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:03:50,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:03:50,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:03:50,649 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:03:50,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-01-28 09:03:51,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 09:03:51,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:03:51,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 09:03:51,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:03:51,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:03:51,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-01-28 09:03:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:03:51,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:03:51,452 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-28 09:03:51,453 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 71 treesize of output 88 [2023-01-28 09:03:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:03:51,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693950364] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:03:51,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:03:51,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-01-28 09:03:51,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220658747] [2023-01-28 09:03:51,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:03:51,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 09:03:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:03:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 09:03:51,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-01-28 09:03:51,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:03:51,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 637 places, 1132 transitions, 61904 flow. Second operand has 21 states, 21 states have (on average 165.04761904761904) internal successors, (3466), 21 states have internal predecessors, (3466), 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) [2023-01-28 09:03:51,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:03:51,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:03:51,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:03:57,714 INFO L130 PetriNetUnfolder]: 5881/10443 cut-off events. [2023-01-28 09:03:57,714 INFO L131 PetriNetUnfolder]: For 1414252/1414252 co-relation queries the response was YES. [2023-01-28 09:03:57,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225106 conditions, 10443 events. 5881/10443 cut-off events. For 1414252/1414252 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 81327 event pairs, 2062 based on Foata normal form. 4/10447 useless extension candidates. Maximal degree in co-relation 224842. Up to 9441 conditions per place. [2023-01-28 09:03:58,026 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 997 selfloop transitions, 153 changer transitions 2/1152 dead transitions. [2023-01-28 09:03:58,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 1152 transitions, 64423 flow [2023-01-28 09:03:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 09:03:58,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 09:03:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2014 transitions. [2023-01-28 09:03:58,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3432174505794138 [2023-01-28 09:03:58,028 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2014 transitions. [2023-01-28 09:03:58,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2014 transitions. [2023-01-28 09:03:58,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:03:58,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2014 transitions. [2023-01-28 09:03:58,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 167.83333333333334) internal successors, (2014), 12 states have internal predecessors, (2014), 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) [2023-01-28 09:03:58,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 09:03:58,031 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 09:03:58,031 INFO L175 Difference]: Start difference. First operand has 637 places, 1132 transitions, 61904 flow. Second operand 12 states and 2014 transitions. [2023-01-28 09:03:58,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 1152 transitions, 64423 flow [2023-01-28 09:04:08,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 1152 transitions, 63548 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-01-28 09:04:08,590 INFO L231 Difference]: Finished difference. Result has 639 places, 1132 transitions, 61435 flow [2023-01-28 09:04:08,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=60837, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=977, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=61435, PETRI_PLACES=639, PETRI_TRANSITIONS=1132} [2023-01-28 09:04:08,591 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 616 predicate places. [2023-01-28 09:04:08,591 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 1132 transitions, 61435 flow [2023-01-28 09:04:08,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.04761904761904) internal successors, (3466), 21 states have internal predecessors, (3466), 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) [2023-01-28 09:04:08,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:04:08,592 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:04:08,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2023-01-28 09:04:08,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:04:08,792 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:04:08,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:04:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1346343057, now seen corresponding path program 84 times [2023-01-28 09:04:08,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:04:08,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724614496] [2023-01-28 09:04:08,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:04:08,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:04:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:04:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:04:09,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:04:09,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724614496] [2023-01-28 09:04:09,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724614496] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:04:09,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908664078] [2023-01-28 09:04:09,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:04:09,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:04:09,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:04:09,355 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:04:09,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-01-28 09:04:09,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 09:04:09,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:04:09,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 09:04:09,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:04:09,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:04:09,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-01-28 09:04:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:04:09,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:04:10,170 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-01-28 09:04:10,170 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 63 treesize of output 67 [2023-01-28 09:04:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:04:10,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908664078] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:04:10,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:04:10,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-01-28 09:04:10,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61358280] [2023-01-28 09:04:10,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:04:10,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 09:04:10,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:04:10,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 09:04:10,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-01-28 09:04:10,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:04:10,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 1132 transitions, 61435 flow. Second operand has 22 states, 22 states have (on average 165.04545454545453) internal successors, (3631), 22 states have internal predecessors, (3631), 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) [2023-01-28 09:04:10,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:04:10,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:04:10,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:04:16,713 INFO L130 PetriNetUnfolder]: 5873/10427 cut-off events. [2023-01-28 09:04:16,714 INFO L131 PetriNetUnfolder]: For 1389319/1389319 co-relation queries the response was YES. [2023-01-28 09:04:16,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223707 conditions, 10427 events. 5873/10427 cut-off events. For 1389319/1389319 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 81219 event pairs, 1330 based on Foata normal form. 4/10431 useless extension candidates. Maximal degree in co-relation 223442. Up to 6283 conditions per place. [2023-01-28 09:04:16,909 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 712 selfloop transitions, 444 changer transitions 2/1158 dead transitions. [2023-01-28 09:04:16,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 649 places, 1158 transitions, 63740 flow [2023-01-28 09:04:16,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 09:04:16,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 09:04:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2022 transitions. [2023-01-28 09:04:16,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445807770961145 [2023-01-28 09:04:16,910 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2022 transitions. [2023-01-28 09:04:16,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2022 transitions. [2023-01-28 09:04:16,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:04:16,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2022 transitions. [2023-01-28 09:04:16,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 168.5) internal successors, (2022), 12 states have internal predecessors, (2022), 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) [2023-01-28 09:04:16,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 09:04:16,914 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 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) [2023-01-28 09:04:16,914 INFO L175 Difference]: Start difference. First operand has 639 places, 1132 transitions, 61435 flow. Second operand 12 states and 2022 transitions. [2023-01-28 09:04:16,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 649 places, 1158 transitions, 63740 flow [2023-01-28 09:04:28,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 1158 transitions, 63389 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-01-28 09:04:28,528 INFO L231 Difference]: Finished difference. Result has 639 places, 1129 transitions, 61773 flow [2023-01-28 09:04:28,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=60893, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=61773, PETRI_PLACES=639, PETRI_TRANSITIONS=1129} [2023-01-28 09:04:28,530 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 616 predicate places. [2023-01-28 09:04:28,530 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 1129 transitions, 61773 flow [2023-01-28 09:04:28,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 165.04545454545453) internal successors, (3631), 22 states have internal predecessors, (3631), 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) [2023-01-28 09:04:28,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:04:28,531 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:04:28,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2023-01-28 09:04:28,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:04:28,738 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:04:28,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:04:28,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1827791477, now seen corresponding path program 85 times [2023-01-28 09:04:28,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:04:28,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809511923] [2023-01-28 09:04:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:04:28,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:04:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:04:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:04:29,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:04:29,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809511923] [2023-01-28 09:04:29,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809511923] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:04:29,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300956694] [2023-01-28 09:04:29,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:04:29,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:04:29,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:04:29,293 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:04:29,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-01-28 09:04:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:04:29,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 09:04:29,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:04:29,864 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:04:29,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-01-28 09:04:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:04:29,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:04:30,040 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-01-28 09:04:30,041 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 63 treesize of output 67 [2023-01-28 09:04:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:04:30,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300956694] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:04:30,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:04:30,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 09:04:30,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560803254] [2023-01-28 09:04:30,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:04:30,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 09:04:30,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:04:30,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 09:04:30,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-01-28 09:04:30,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:04:30,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 1129 transitions, 61773 flow. Second operand has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 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) [2023-01-28 09:04:30,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:04:30,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:04:30,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:04:35,873 INFO L130 PetriNetUnfolder]: 5853/10359 cut-off events. [2023-01-28 09:04:35,874 INFO L131 PetriNetUnfolder]: For 1391173/1391173 co-relation queries the response was YES. [2023-01-28 09:04:35,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223403 conditions, 10359 events. 5853/10359 cut-off events. For 1391173/1391173 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 80208 event pairs, 1338 based on Foata normal form. 4/10363 useless extension candidates. Maximal degree in co-relation 223138. Up to 6283 conditions per place. [2023-01-28 09:04:36,051 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 705 selfloop transitions, 430 changer transitions 6/1141 dead transitions. [2023-01-28 09:04:36,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 1141 transitions, 63604 flow [2023-01-28 09:04:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:04:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:04:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1517 transitions. [2023-01-28 09:04:36,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34469438763917293 [2023-01-28 09:04:36,053 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1517 transitions. [2023-01-28 09:04:36,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1517 transitions. [2023-01-28 09:04:36,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:04:36,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1517 transitions. [2023-01-28 09:04:36,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.55555555555554) internal successors, (1517), 9 states have internal predecessors, (1517), 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) [2023-01-28 09:04:36,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 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) [2023-01-28 09:04:36,055 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 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) [2023-01-28 09:04:36,056 INFO L175 Difference]: Start difference. First operand has 639 places, 1129 transitions, 61773 flow. Second operand 9 states and 1517 transitions. [2023-01-28 09:04:36,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 1141 transitions, 63604 flow [2023-01-28 09:04:46,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 1141 transitions, 62732 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-01-28 09:04:46,983 INFO L231 Difference]: Finished difference. Result has 637 places, 1119 transitions, 61027 flow [2023-01-28 09:04:46,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=60331, PETRI_DIFFERENCE_MINUEND_PLACES=629, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=61027, PETRI_PLACES=637, PETRI_TRANSITIONS=1119} [2023-01-28 09:04:46,984 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 614 predicate places. [2023-01-28 09:04:46,984 INFO L495 AbstractCegarLoop]: Abstraction has has 637 places, 1119 transitions, 61027 flow [2023-01-28 09:04:46,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 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) [2023-01-28 09:04:46,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:04:46,984 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:04:46,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2023-01-28 09:04:47,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2023-01-28 09:04:47,185 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:04:47,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:04:47,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1370427621, now seen corresponding path program 86 times [2023-01-28 09:04:47,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:04:47,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711804726] [2023-01-28 09:04:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:04:47,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:04:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:04:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:04:47,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:04:47,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711804726] [2023-01-28 09:04:47,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711804726] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:04:47,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658114767] [2023-01-28 09:04:47,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:04:47,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:04:47,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:04:47,614 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:04:47,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-01-28 09:04:47,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:04:47,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:04:47,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-28 09:04:47,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:04:48,121 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 09:04:48,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-01-28 09:04:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:04:48,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:04:48,434 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 09:04:48,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 09:04:48,468 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 09:04:48,469 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 40 treesize of output 56 [2023-01-28 09:04:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:04:48,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658114767] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:04:48,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:04:48,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2023-01-28 09:04:48,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433308121] [2023-01-28 09:04:48,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:04:48,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 09:04:48,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:04:48,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 09:04:48,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-01-28 09:04:48,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 489 [2023-01-28 09:04:48,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 637 places, 1119 transitions, 61027 flow. Second operand has 25 states, 25 states have (on average 161.96) internal successors, (4049), 25 states have internal predecessors, (4049), 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) [2023-01-28 09:04:48,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:04:48,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 489 [2023-01-28 09:04:48,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:04:54,809 INFO L130 PetriNetUnfolder]: 5857/10343 cut-off events. [2023-01-28 09:04:54,809 INFO L131 PetriNetUnfolder]: For 1435019/1435019 co-relation queries the response was YES. [2023-01-28 09:04:54,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223513 conditions, 10343 events. 5857/10343 cut-off events. For 1435019/1435019 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 79933 event pairs, 992 based on Foata normal form. 60/10403 useless extension candidates. Maximal degree in co-relation 223248. Up to 7388 conditions per place. [2023-01-28 09:04:54,992 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 495 selfloop transitions, 687 changer transitions 0/1182 dead transitions. [2023-01-28 09:04:54,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 1182 transitions, 65437 flow [2023-01-28 09:04:54,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 09:04:54,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 09:04:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3133 transitions. [2023-01-28 09:04:54,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33720805080185123 [2023-01-28 09:04:54,994 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3133 transitions. [2023-01-28 09:04:54,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3133 transitions. [2023-01-28 09:04:54,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:04:54,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3133 transitions. [2023-01-28 09:04:54,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 164.89473684210526) internal successors, (3133), 19 states have internal predecessors, (3133), 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) [2023-01-28 09:04:54,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 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) [2023-01-28 09:04:54,999 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 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) [2023-01-28 09:04:54,999 INFO L175 Difference]: Start difference. First operand has 637 places, 1119 transitions, 61027 flow. Second operand 19 states and 3133 transitions. [2023-01-28 09:04:54,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 1182 transitions, 65437 flow [2023-01-28 09:05:05,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 1182 transitions, 64544 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-01-28 09:05:05,624 INFO L231 Difference]: Finished difference. Result has 650 places, 1143 transitions, 63872 flow [2023-01-28 09:05:05,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=60066, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=663, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=63872, PETRI_PLACES=650, PETRI_TRANSITIONS=1143} [2023-01-28 09:05:05,625 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 627 predicate places. [2023-01-28 09:05:05,625 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 1143 transitions, 63872 flow [2023-01-28 09:05:05,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 161.96) internal successors, (4049), 25 states have internal predecessors, (4049), 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) [2023-01-28 09:05:05,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:05:05,625 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:05:05,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2023-01-28 09:05:05,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:05:05,829 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:05:05,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:05:05,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2112021603, now seen corresponding path program 87 times [2023-01-28 09:05:05,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:05:05,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181367707] [2023-01-28 09:05:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:05:05,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:05:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:05:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:05:06,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:05:06,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181367707] [2023-01-28 09:05:06,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181367707] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:05:06,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496423556] [2023-01-28 09:05:06,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:05:06,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:05:06,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:05:06,297 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:05:06,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-01-28 09:05:06,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 09:05:06,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:05:06,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-28 09:05:06,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:05:06,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:05:06,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-01-28 09:05:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:05:06,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:05:06,983 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 09:05:06,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 09:05:07,017 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 09:05:07,017 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 40 treesize of output 56 [2023-01-28 09:05:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:05:07,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496423556] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:05:07,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:05:07,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-01-28 09:05:07,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252590200] [2023-01-28 09:05:07,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:05:07,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 09:05:07,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:05:07,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 09:05:07,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-01-28 09:05:07,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:05:07,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 1143 transitions, 63872 flow. Second operand has 21 states, 21 states have (on average 165.0952380952381) internal successors, (3467), 21 states have internal predecessors, (3467), 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) [2023-01-28 09:05:07,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:05:07,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:05:07,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:05:13,181 INFO L130 PetriNetUnfolder]: 5839/10281 cut-off events. [2023-01-28 09:05:13,182 INFO L131 PetriNetUnfolder]: For 1477467/1477467 co-relation queries the response was YES. [2023-01-28 09:05:13,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226769 conditions, 10281 events. 5839/10281 cut-off events. For 1477467/1477467 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 79161 event pairs, 964 based on Foata normal form. 4/10285 useless extension candidates. Maximal degree in co-relation 226498. Up to 5457 conditions per place. [2023-01-28 09:05:13,358 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 513 selfloop transitions, 669 changer transitions 2/1184 dead transitions. [2023-01-28 09:05:13,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 1184 transitions, 66661 flow [2023-01-28 09:05:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 09:05:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 09:05:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2847 transitions. [2023-01-28 09:05:13,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34247564056297364 [2023-01-28 09:05:13,360 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2847 transitions. [2023-01-28 09:05:13,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2847 transitions. [2023-01-28 09:05:13,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:05:13,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2847 transitions. [2023-01-28 09:05:13,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 167.47058823529412) internal successors, (2847), 17 states have internal predecessors, (2847), 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) [2023-01-28 09:05:13,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 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) [2023-01-28 09:05:13,365 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 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) [2023-01-28 09:05:13,366 INFO L175 Difference]: Start difference. First operand has 650 places, 1143 transitions, 63872 flow. Second operand 17 states and 2847 transitions. [2023-01-28 09:05:13,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 1184 transitions, 66661 flow [2023-01-28 09:05:25,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 1184 transitions, 65799 flow, removed 322 selfloop flow, removed 9 redundant places. [2023-01-28 09:05:25,272 INFO L231 Difference]: Finished difference. Result has 655 places, 1142 transitions, 64340 flow [2023-01-28 09:05:25,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=62713, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=64340, PETRI_PLACES=655, PETRI_TRANSITIONS=1142} [2023-01-28 09:05:25,273 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 632 predicate places. [2023-01-28 09:05:25,273 INFO L495 AbstractCegarLoop]: Abstraction has has 655 places, 1142 transitions, 64340 flow [2023-01-28 09:05:25,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.0952380952381) internal successors, (3467), 21 states have internal predecessors, (3467), 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) [2023-01-28 09:05:25,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:05:25,274 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:05:25,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2023-01-28 09:05:25,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:05:25,481 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:05:25,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:05:25,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1881186321, now seen corresponding path program 88 times [2023-01-28 09:05:25,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:05:25,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233852909] [2023-01-28 09:05:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:05:25,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:05:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:05:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:05:26,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:05:26,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233852909] [2023-01-28 09:05:26,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233852909] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:05:26,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463790644] [2023-01-28 09:05:26,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:05:26,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:05:26,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:05:26,044 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:05:26,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2023-01-28 09:05:26,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:05:26,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:05:26,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 09:05:26,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:05:26,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 09:05:26,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 09:05:26,655 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 09:05:26,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2023-01-28 09:05:26,790 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 09:05:26,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 23 [2023-01-28 09:05:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:05:26,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:05:27,020 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-28 09:05:27,021 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 86 treesize of output 107 [2023-01-28 09:05:27,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:05:27,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-01-28 09:05:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:05:27,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463790644] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:05:27,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:05:27,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-01-28 09:05:27,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874794731] [2023-01-28 09:05:27,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:05:27,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 09:05:27,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:05:27,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 09:05:27,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=809, Unknown=1, NotChecked=0, Total=930 [2023-01-28 09:05:27,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 489 [2023-01-28 09:05:27,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 1142 transitions, 64340 flow. Second operand has 31 states, 31 states have (on average 156.7741935483871) internal successors, (4860), 31 states have internal predecessors, (4860), 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) [2023-01-28 09:05:27,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:05:27,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 489 [2023-01-28 09:05:27,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:05:35,517 INFO L130 PetriNetUnfolder]: 6201/10927 cut-off events. [2023-01-28 09:05:35,517 INFO L131 PetriNetUnfolder]: For 1505962/1505962 co-relation queries the response was YES. [2023-01-28 09:05:35,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240302 conditions, 10927 events. 6201/10927 cut-off events. For 1505962/1505962 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 84420 event pairs, 290 based on Foata normal form. 68/10995 useless extension candidates. Maximal degree in co-relation 240032. Up to 4084 conditions per place. [2023-01-28 09:05:35,704 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 540 selfloop transitions, 715 changer transitions 1/1256 dead transitions. [2023-01-28 09:05:35,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 672 places, 1256 transitions, 70487 flow [2023-01-28 09:05:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 09:05:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 09:05:35,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3210 transitions. [2023-01-28 09:05:35,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3282208588957055 [2023-01-28 09:05:35,708 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3210 transitions. [2023-01-28 09:05:35,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3210 transitions. [2023-01-28 09:05:35,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:05:35,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3210 transitions. [2023-01-28 09:05:35,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 160.5) internal successors, (3210), 20 states have internal predecessors, (3210), 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) [2023-01-28 09:05:35,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 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) [2023-01-28 09:05:35,713 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 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) [2023-01-28 09:05:35,713 INFO L175 Difference]: Start difference. First operand has 655 places, 1142 transitions, 64340 flow. Second operand 20 states and 3210 transitions. [2023-01-28 09:05:35,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 672 places, 1256 transitions, 70487 flow [2023-01-28 09:05:49,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 658 places, 1256 transitions, 69494 flow, removed 24 selfloop flow, removed 14 redundant places. [2023-01-28 09:05:49,247 INFO L231 Difference]: Finished difference. Result has 663 places, 1189 transitions, 67876 flow [2023-01-28 09:05:49,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=63145, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=67876, PETRI_PLACES=663, PETRI_TRANSITIONS=1189} [2023-01-28 09:05:49,248 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 640 predicate places. [2023-01-28 09:05:49,248 INFO L495 AbstractCegarLoop]: Abstraction has has 663 places, 1189 transitions, 67876 flow [2023-01-28 09:05:49,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 156.7741935483871) internal successors, (4860), 31 states have internal predecessors, (4860), 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) [2023-01-28 09:05:49,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:05:49,249 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:05:49,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2023-01-28 09:05:49,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:05:49,449 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:05:49,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:05:49,450 INFO L85 PathProgramCache]: Analyzing trace with hash -398757043, now seen corresponding path program 89 times [2023-01-28 09:05:49,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:05:49,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743151216] [2023-01-28 09:05:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:05:49,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:05:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:05:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:05:49,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:05:49,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743151216] [2023-01-28 09:05:49,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743151216] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:05:49,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809536560] [2023-01-28 09:05:49,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:05:49,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:05:49,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:05:49,909 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:05:49,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2023-01-28 09:05:50,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 09:05:50,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:05:50,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 09:05:50,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:05:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:05:50,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:05:50,617 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 09:05:50,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 09:05:50,651 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 09:05:50,651 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 40 treesize of output 56 [2023-01-28 09:05:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:05:50,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809536560] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:05:50,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:05:50,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-01-28 09:05:50,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62116561] [2023-01-28 09:05:50,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:05:50,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 09:05:50,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:05:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 09:05:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-01-28 09:05:50,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 489 [2023-01-28 09:05:50,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 663 places, 1189 transitions, 67876 flow. Second operand has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 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) [2023-01-28 09:05:50,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:05:50,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 489 [2023-01-28 09:05:50,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:05:57,493 INFO L130 PetriNetUnfolder]: 6189/10891 cut-off events. [2023-01-28 09:05:57,493 INFO L131 PetriNetUnfolder]: For 1645319/1645319 co-relation queries the response was YES. [2023-01-28 09:05:57,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241832 conditions, 10891 events. 6189/10891 cut-off events. For 1645319/1645319 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 84328 event pairs, 2163 based on Foata normal form. 4/10895 useless extension candidates. Maximal degree in co-relation 241554. Up to 9915 conditions per place. [2023-01-28 09:05:57,683 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1055 selfloop transitions, 136 changer transitions 5/1196 dead transitions. [2023-01-28 09:05:57,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 671 places, 1196 transitions, 69927 flow [2023-01-28 09:05:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:05:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:05:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1509 transitions. [2023-01-28 09:05:57,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3428766189502386 [2023-01-28 09:05:57,686 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1509 transitions. [2023-01-28 09:05:57,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1509 transitions. [2023-01-28 09:05:57,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:05:57,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1509 transitions. [2023-01-28 09:05:57,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.66666666666666) internal successors, (1509), 9 states have internal predecessors, (1509), 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) [2023-01-28 09:05:57,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 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) [2023-01-28 09:05:57,689 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 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) [2023-01-28 09:05:57,689 INFO L175 Difference]: Start difference. First operand has 663 places, 1189 transitions, 67876 flow. Second operand 9 states and 1509 transitions. [2023-01-28 09:05:57,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 671 places, 1196 transitions, 69927 flow [2023-01-28 09:06:11,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 1196 transitions, 69238 flow, removed 149 selfloop flow, removed 10 redundant places. [2023-01-28 09:06:11,376 INFO L231 Difference]: Finished difference. Result has 661 places, 1182 transitions, 66904 flow [2023-01-28 09:06:11,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=66776, PETRI_DIFFERENCE_MINUEND_PLACES=653, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1049, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=66904, PETRI_PLACES=661, PETRI_TRANSITIONS=1182} [2023-01-28 09:06:11,377 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 638 predicate places. [2023-01-28 09:06:11,377 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 1182 transitions, 66904 flow [2023-01-28 09:06:11,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 165.1) internal successors, (3302), 20 states have internal predecessors, (3302), 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) [2023-01-28 09:06:11,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:06:11,378 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:06:11,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2023-01-28 09:06:11,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:06:11,578 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:06:11,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:06:11,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1121667931, now seen corresponding path program 90 times [2023-01-28 09:06:11,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:06:11,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737309943] [2023-01-28 09:06:11,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:06:11,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:06:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:06:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:06:12,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:06:12,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737309943] [2023-01-28 09:06:12,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737309943] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:06:12,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362146483] [2023-01-28 09:06:12,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:06:12,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:06:12,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:06:12,076 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:06:12,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2023-01-28 09:06:12,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 09:06:12,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:06:12,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-28 09:06:12,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:06:12,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 09:06:12,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 09:06:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:06:12,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:06:13,056 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6697 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6697))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))))))) is different from false [2023-01-28 09:06:13,100 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-28 09:06:13,100 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 114 treesize of output 127 [2023-01-28 09:06:13,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:06:13,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 88 [2023-01-28 09:06:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 09:06:13,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362146483] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:06:13,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:06:13,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2023-01-28 09:06:13,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910629400] [2023-01-28 09:06:13,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:06:13,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 09:06:13,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:06:13,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 09:06:13,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=928, Unknown=1, NotChecked=62, Total=1122 [2023-01-28 09:06:13,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-01-28 09:06:13,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 1182 transitions, 66904 flow. Second operand has 34 states, 34 states have (on average 160.6764705882353) internal successors, (5463), 34 states have internal predecessors, (5463), 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) [2023-01-28 09:06:13,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:06:13,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-01-28 09:06:13,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:06:20,017 INFO L130 PetriNetUnfolder]: 6183/10857 cut-off events. [2023-01-28 09:06:20,018 INFO L131 PetriNetUnfolder]: For 1626487/1626487 co-relation queries the response was YES. [2023-01-28 09:06:20,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240704 conditions, 10857 events. 6183/10857 cut-off events. For 1626487/1626487 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 83763 event pairs, 1282 based on Foata normal form. 60/10917 useless extension candidates. Maximal degree in co-relation 240430. Up to 6289 conditions per place. [2023-01-28 09:06:20,363 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 642 selfloop transitions, 595 changer transitions 0/1237 dead transitions. [2023-01-28 09:06:20,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 1237 transitions, 70853 flow [2023-01-28 09:06:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 09:06:20,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 09:06:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2949 transitions. [2023-01-28 09:06:20,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33503749147920925 [2023-01-28 09:06:20,365 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2949 transitions. [2023-01-28 09:06:20,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2949 transitions. [2023-01-28 09:06:20,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:06:20,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2949 transitions. [2023-01-28 09:06:20,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 163.83333333333334) internal successors, (2949), 18 states have internal predecessors, (2949), 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) [2023-01-28 09:06:20,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 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) [2023-01-28 09:06:20,370 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 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) [2023-01-28 09:06:20,370 INFO L175 Difference]: Start difference. First operand has 661 places, 1182 transitions, 66904 flow. Second operand 18 states and 2949 transitions. [2023-01-28 09:06:20,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 1237 transitions, 70853 flow Received shutdown request... [2023-01-28 09:06:23,863 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 09:06:23,863 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 09:06:23,872 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 09:06:23,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2023-01-28 09:06:24,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2023-01-28 09:06:24,073 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-28 09:06:24,074 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 09:06:24,074 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 09:06:24,074 INFO L445 BasicCegarLoop]: Path program histogram: [90, 6, 1, 1, 1] [2023-01-28 09:06:24,076 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 09:06:24,076 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 09:06:24,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 09:06:24 BasicIcfg [2023-01-28 09:06:24,077 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 09:06:24,078 INFO L158 Benchmark]: Toolchain (without parser) took 773813.55ms. Allocated memory was 343.9MB in the beginning and 9.5GB in the end (delta: 9.2GB). Free memory was 304.1MB in the beginning and 7.6GB in the end (delta: -7.3GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. [2023-01-28 09:06:24,078 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 09:06:24,078 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.56ms. Allocated memory is still 343.9MB. Free memory was 304.1MB in the beginning and 292.3MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 09:06:24,078 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.60ms. Allocated memory is still 343.9MB. Free memory was 292.3MB in the beginning and 290.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 09:06:24,078 INFO L158 Benchmark]: Boogie Preprocessor took 26.06ms. Allocated memory is still 343.9MB. Free memory was 290.1MB in the beginning and 288.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 09:06:24,078 INFO L158 Benchmark]: RCFGBuilder took 479.00ms. Allocated memory is still 343.9MB. Free memory was 288.2MB in the beginning and 268.1MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-01-28 09:06:24,078 INFO L158 Benchmark]: TraceAbstraction took 773005.30ms. Allocated memory was 343.9MB in the beginning and 9.5GB in the end (delta: 9.2GB). Free memory was 267.5MB in the beginning and 7.6GB in the end (delta: -7.3GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. [2023-01-28 09:06:24,079 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 234.56ms. Allocated memory is still 343.9MB. Free memory was 304.1MB in the beginning and 292.3MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 63.60ms. Allocated memory is still 343.9MB. Free memory was 292.3MB in the beginning and 290.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 26.06ms. Allocated memory is still 343.9MB. Free memory was 290.1MB in the beginning and 288.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 479.00ms. Allocated memory is still 343.9MB. Free memory was 288.2MB in the beginning and 268.1MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 773005.30ms. Allocated memory was 343.9MB in the beginning and 9.5GB in the end (delta: 9.2GB). Free memory was 267.5MB in the beginning and 7.6GB in the end (delta: -7.3GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.5s, 207 PlacesBefore, 23 PlacesAfterwards, 221 TransitionsBefore, 20 TransitionsAfterwards, 5400 CoEnabledTransitionPairs, 7 FixpointIterations, 100 TrivialSequentialCompositions, 87 ConcurrentSequentialCompositions, 29 TrivialYvCompositions, 25 ConcurrentYvCompositions, 17 ChoiceCompositions, 258 TotalNumberOfCompositions, 5353 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5064, independent: 5039, independent conditional: 0, independent unconditional: 5039, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3177, independent: 3169, independent conditional: 0, independent unconditional: 3169, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5064, independent: 1870, independent conditional: 0, independent unconditional: 1870, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 3177, unknown conditional: 0, unknown unconditional: 3177] , Statistics on independence cache: Total cache size (in pairs): 28, Positive cache size: 26, Positive conditional cache size: 0, Positive unconditional cache size: 26, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 295 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 772.8s, OverallIterations: 99, TraceHistogramMax: 5, PathProgramHistogramMax: 90, EmptinessCheckTime: 0.0s, AutomataDifference: 574.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.7s, HoareTripleCheckerStatistics: 189 mSolverCounterUnknown, 12127 SdHoareTripleChecker+Valid, 34.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12127 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 30.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1347 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1427 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 55604 IncrementalHoareTripleChecker+Invalid, 58567 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1427 mSolverCounterUnsat, 0 mSDtfsCounter, 55604 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7876 GetRequests, 4601 SyntacticMatches, 48 SemanticMatches, 3227 ConstructedPredicates, 15 IntricatePredicates, 4 DeprecatedPredicates, 24137 ImplicationChecksByTransitivity, 116.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67876occurred in iteration=97, InterpolantAutomatonStates: 1436, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.6s SsaConstructionTime, 7.4s SatisfiabilityAnalysisTime, 144.7s InterpolantComputationTime, 5534 NumberOfCodeBlocks, 5438 NumberOfCodeBlocksAsserted, 332 NumberOfCheckSat, 7911 ConstructedInterpolants, 178 QuantifiedInterpolants, 83548 SizeOfPredicates, 2138 NumberOfNonLiveVariables, 32998 ConjunctsInSsa, 4768 ConjunctsInUnsatCore, 285 InterpolantComputations, 7 PerfectInterpolantSequences, 8624/9430 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown