/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_DEAD -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 22:22:01,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 22:22:01,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 22:22:01,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 22:22:01,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 22:22:01,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 22:22:01,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 22:22:01,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 22:22:01,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 22:22:01,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 22:22:01,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 22:22:01,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 22:22:01,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 22:22:01,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 22:22:01,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 22:22:01,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 22:22:01,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 22:22:01,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 22:22:01,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 22:22:01,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 22:22:01,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 22:22:01,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 22:22:01,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 22:22:01,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 22:22:01,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 22:22:01,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 22:22:01,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 22:22:01,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 22:22:01,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 22:22:01,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 22:22:01,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 22:22:01,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 22:22:01,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 22:22:01,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 22:22:01,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 22:22:01,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 22:22:01,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 22:22:01,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 22:22:01,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 22:22:01,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 22:22:01,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 22:22:01,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 22:22:01,644 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 22:22:01,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 22:22:01,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 22:22:01,645 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 22:22:01,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 22:22:01,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 22:22:01,646 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 22:22:01,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 22:22:01,647 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 22:22:01,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 22:22:01,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 22:22:01,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 22:22:01,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 22:22:01,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 22:22:01,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 22:22:01,648 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 22:22:01,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 22:22:01,648 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 22:22:01,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 22:22:01,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 22:22:01,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 22:22:01,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 22:22:01,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 22:22:01,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 22:22:01,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 22:22:01,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 22:22:01,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 22:22:01,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 22:22:01,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 22:22:01,649 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 22:22:01,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-12 22:22:01,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 22:22:02,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 22:22:02,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 22:22:02,002 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 22:22:02,004 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 22:22:02,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2022-12-12 22:22:02,952 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 22:22:03,136 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 22:22:03,137 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2022-12-12 22:22:03,142 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42ff25e6a/7baf5101658747baa9ed5c54cfd83015/FLAG44518f04a [2022-12-12 22:22:03,155 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42ff25e6a/7baf5101658747baa9ed5c54cfd83015 [2022-12-12 22:22:03,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 22:22:03,159 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 22:22:03,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 22:22:03,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 22:22:03,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 22:22:03,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 10:22:03" (1/1) ... [2022-12-12 22:22:03,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@445756bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:03, skipping insertion in model container [2022-12-12 22:22:03,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 10:22:03" (1/1) ... [2022-12-12 22:22:03,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 22:22:03,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 22:22:03,345 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c[4929,4942] [2022-12-12 22:22:03,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 22:22:03,370 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 22:22:03,404 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c[4929,4942] [2022-12-12 22:22:03,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 22:22:03,420 INFO L208 MainTranslator]: Completed translation [2022-12-12 22:22:03,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:03 WrapperNode [2022-12-12 22:22:03,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 22:22:03,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 22:22:03,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 22:22:03,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 22:22:03,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:03" (1/1) ... [2022-12-12 22:22:03,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:03" (1/1) ... [2022-12-12 22:22:03,478 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 388 [2022-12-12 22:22:03,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 22:22:03,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 22:22:03,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 22:22:03,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 22:22:03,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:03" (1/1) ... [2022-12-12 22:22:03,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:03" (1/1) ... [2022-12-12 22:22:03,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:03" (1/1) ... [2022-12-12 22:22:03,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:03" (1/1) ... [2022-12-12 22:22:03,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:03" (1/1) ... [2022-12-12 22:22:03,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:03" (1/1) ... [2022-12-12 22:22:03,520 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:03" (1/1) ... [2022-12-12 22:22:03,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:03" (1/1) ... [2022-12-12 22:22:03,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 22:22:03,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 22:22:03,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 22:22:03,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 22:22:03,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:03" (1/1) ... [2022-12-12 22:22:03,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 22:22:03,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:03,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-12 22:22:03,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-12 22:22:03,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 22:22:03,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 22:22:03,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 22:22:03,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 22:22:03,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 22:22:03,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 22:22:03,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 22:22:03,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 22:22:03,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 22:22:03,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 22:22:03,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 22:22:03,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 22:22:03,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 22:22:03,593 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 22:22:03,669 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 22:22:03,670 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 22:22:04,153 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 22:22:04,163 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 22:22:04,163 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-12 22:22:04,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 10:22:04 BoogieIcfgContainer [2022-12-12 22:22:04,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 22:22:04,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 22:22:04,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 22:22:04,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 22:22:04,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 10:22:03" (1/3) ... [2022-12-12 22:22:04,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512c1504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 10:22:04, skipping insertion in model container [2022-12-12 22:22:04,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:03" (2/3) ... [2022-12-12 22:22:04,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512c1504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 10:22:04, skipping insertion in model container [2022-12-12 22:22:04,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 10:22:04" (3/3) ... [2022-12-12 22:22:04,171 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2022-12-12 22:22:04,183 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 22:22:04,183 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 22:22:04,183 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 22:22:04,322 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 22:22:04,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 425 places, 467 transitions, 950 flow [2022-12-12 22:22:04,501 INFO L130 PetriNetUnfolder]: 49/465 cut-off events. [2022-12-12 22:22:04,501 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 22:22:04,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 465 events. 49/465 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1352 event pairs, 0 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 319. Up to 2 conditions per place. [2022-12-12 22:22:04,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 425 places, 467 transitions, 950 flow [2022-12-12 22:22:04,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 415 places, 457 transitions, 926 flow [2022-12-12 22:22:04,526 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 22:22:04,545 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 415 places, 457 transitions, 926 flow [2022-12-12 22:22:04,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 415 places, 457 transitions, 926 flow [2022-12-12 22:22:04,619 INFO L130 PetriNetUnfolder]: 49/457 cut-off events. [2022-12-12 22:22:04,619 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 22:22:04,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 457 events. 49/457 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1332 event pairs, 0 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 319. Up to 2 conditions per place. [2022-12-12 22:22:04,640 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 415 places, 457 transitions, 926 flow [2022-12-12 22:22:04,641 INFO L226 LiptonReduction]: Number of co-enabled transitions 52052 [2022-12-12 22:22:19,184 INFO L241 LiptonReduction]: Total number of compositions: 428 [2022-12-12 22:22:19,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 22:22:19,219 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;@10cbf590, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 22:22:19,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 22:22:19,241 INFO L130 PetriNetUnfolder]: 7/28 cut-off events. [2022-12-12 22:22:19,241 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 22:22:19,241 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:19,242 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:19,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:19,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:19,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1337779771, now seen corresponding path program 1 times [2022-12-12 22:22:19,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:19,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124588689] [2022-12-12 22:22:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:19,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 22:22:19,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:19,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124588689] [2022-12-12 22:22:19,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124588689] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:22:19,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:22:19,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 22:22:19,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361010631] [2022-12-12 22:22:19,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:22:19,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 22:22:19,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:19,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 22:22:19,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 22:22:19,571 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 29 [2022-12-12 22:22:19,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:19,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:19,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 29 [2022-12-12 22:22:19,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:19,675 INFO L130 PetriNetUnfolder]: 157/250 cut-off events. [2022-12-12 22:22:19,675 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-12-12 22:22:19,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 250 events. 157/250 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 639 event pairs, 87 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 472. Up to 249 conditions per place. [2022-12-12 22:22:19,677 INFO L137 encePairwiseOnDemand]: 24/29 looper letters, 27 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2022-12-12 22:22:19,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 136 flow [2022-12-12 22:22:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 22:22:19,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 22:22:19,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 33 transitions. [2022-12-12 22:22:19,689 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2022-12-12 22:22:19,692 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2022-12-12 22:22:19,692 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 31 transitions, 136 flow [2022-12-12 22:22:19,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 31 transitions, 136 flow [2022-12-12 22:22:19,694 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 136 flow [2022-12-12 22:22:19,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:19,694 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:19,694 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:19,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 22:22:19,695 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:19,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:19,697 INFO L85 PathProgramCache]: Analyzing trace with hash -685768648, now seen corresponding path program 1 times [2022-12-12 22:22:19,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:19,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718278604] [2022-12-12 22:22:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:19,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 22:22:19,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:19,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718278604] [2022-12-12 22:22:19,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718278604] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:19,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102703809] [2022-12-12 22:22:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:19,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:19,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:19,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:19,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 22:22:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:19,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-12 22:22:19,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 22:22:20,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:22:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 22:22:20,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102703809] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:22:20,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:22:20,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-12 22:22:20,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688569615] [2022-12-12 22:22:20,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:22:20,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 22:22:20,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:20,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 22:22:20,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-12-12 22:22:20,056 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 29 [2022-12-12 22:22:20,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 136 flow. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:20,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:20,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 29 [2022-12-12 22:22:20,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:20,206 INFO L130 PetriNetUnfolder]: 157/256 cut-off events. [2022-12-12 22:22:20,207 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-12-12 22:22:20,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 256 events. 157/256 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 639 event pairs, 87 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 698. Up to 255 conditions per place. [2022-12-12 22:22:20,208 INFO L137 encePairwiseOnDemand]: 24/29 looper letters, 27 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2022-12-12 22:22:20,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 234 flow [2022-12-12 22:22:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 22:22:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 22:22:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 43 transitions. [2022-12-12 22:22:20,212 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2471264367816092 [2022-12-12 22:22:20,213 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2022-12-12 22:22:20,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 37 transitions, 234 flow [2022-12-12 22:22:20,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 37 transitions, 234 flow [2022-12-12 22:22:20,227 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 234 flow [2022-12-12 22:22:20,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:20,231 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:20,231 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:20,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 22:22:20,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:20,432 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:20,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash 154811961, now seen corresponding path program 2 times [2022-12-12 22:22:20,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:20,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134617244] [2022-12-12 22:22:20,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:20,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 22:22:20,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:20,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134617244] [2022-12-12 22:22:20,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134617244] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:20,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787589804] [2022-12-12 22:22:20,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:22:20,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:20,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:20,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:20,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 22:22:20,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-12 22:22:20,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:22:20,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-12 22:22:20,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 22:22:21,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 22:22:21,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787589804] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:22:21,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 22:22:21,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2022-12-12 22:22:21,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874592089] [2022-12-12 22:22:21,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:22:21,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 22:22:21,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:21,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 22:22:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-12 22:22:21,101 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 29 [2022-12-12 22:22:21,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 234 flow. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:21,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:21,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 29 [2022-12-12 22:22:21,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:21,319 INFO L130 PetriNetUnfolder]: 165/285 cut-off events. [2022-12-12 22:22:21,319 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-12 22:22:21,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1180 conditions, 285 events. 165/285 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 854 event pairs, 87 based on Foata normal form. 1/212 useless extension candidates. Maximal degree in co-relation 974. Up to 284 conditions per place. [2022-12-12 22:22:21,323 INFO L137 encePairwiseOnDemand]: 25/29 looper letters, 43 selfloop transitions, 1 changer transitions 7/51 dead transitions. [2022-12-12 22:22:21,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 435 flow [2022-12-12 22:22:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 22:22:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 22:22:21,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2022-12-12 22:22:21,324 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2022-12-12 22:22:21,325 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2022-12-12 22:22:21,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 51 transitions, 435 flow [2022-12-12 22:22:21,326 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 44 transitions, 370 flow [2022-12-12 22:22:21,326 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 44 transitions, 370 flow [2022-12-12 22:22:21,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:21,327 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:21,327 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:21,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-12 22:22:21,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-12 22:22:21,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:21,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:21,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1939261307, now seen corresponding path program 3 times [2022-12-12 22:22:21,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:21,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966686757] [2022-12-12 22:22:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:21,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 22:22:21,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:21,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966686757] [2022-12-12 22:22:21,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966686757] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:21,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651112488] [2022-12-12 22:22:21,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:22:21,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:21,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:21,691 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:21,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 22:22:21,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-12 22:22:21,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:22:21,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-12 22:22:21,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 22:22:22,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 22:22:22,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651112488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:22:22,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 22:22:22,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2022-12-12 22:22:22,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047132890] [2022-12-12 22:22:22,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:22:22,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 22:22:22,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:22,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 22:22:22,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-12 22:22:22,205 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 29 [2022-12-12 22:22:22,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 44 transitions, 370 flow. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:22,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:22,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 29 [2022-12-12 22:22:22,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:22,408 INFO L130 PetriNetUnfolder]: 171/315 cut-off events. [2022-12-12 22:22:22,408 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-12-12 22:22:22,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 315 events. 171/315 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1109 event pairs, 87 based on Foata normal form. 1/238 useless extension candidates. Maximal degree in co-relation 1350. Up to 314 conditions per place. [2022-12-12 22:22:22,411 INFO L137 encePairwiseOnDemand]: 25/29 looper letters, 58 selfloop transitions, 1 changer transitions 5/64 dead transitions. [2022-12-12 22:22:22,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 64 transitions, 670 flow [2022-12-12 22:22:22,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 22:22:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 22:22:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2022-12-12 22:22:22,417 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4396551724137931 [2022-12-12 22:22:22,419 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2022-12-12 22:22:22,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 64 transitions, 670 flow [2022-12-12 22:22:22,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 59 transitions, 614 flow [2022-12-12 22:22:22,421 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 59 transitions, 614 flow [2022-12-12 22:22:22,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:22,421 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:22,421 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:22,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-12 22:22:22,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:22,626 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:22,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:22,627 INFO L85 PathProgramCache]: Analyzing trace with hash 141319821, now seen corresponding path program 1 times [2022-12-12 22:22:22,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:22,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195400014] [2022-12-12 22:22:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:22,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 22:22:22,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:22,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195400014] [2022-12-12 22:22:22,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195400014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:22,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277016893] [2022-12-12 22:22:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:22,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:22,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:22,742 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:22,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 22:22:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:22,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 22:22:22,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 22:22:22,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:22:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 22:22:22,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277016893] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:22:22,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:22:22,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-12-12 22:22:22,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090332646] [2022-12-12 22:22:22,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:22:22,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 22:22:22,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:22,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 22:22:22,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-12-12 22:22:22,947 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 29 [2022-12-12 22:22:22,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 59 transitions, 614 flow. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:22,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:22,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 29 [2022-12-12 22:22:22,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:23,090 INFO L130 PetriNetUnfolder]: 170/311 cut-off events. [2022-12-12 22:22:23,091 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-12-12 22:22:23,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 311 events. 170/311 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1042 event pairs, 87 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 1598. Up to 310 conditions per place. [2022-12-12 22:22:23,093 INFO L137 encePairwiseOnDemand]: 24/29 looper letters, 49 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2022-12-12 22:22:23,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 756 flow [2022-12-12 22:22:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 22:22:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 22:22:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 41 transitions. [2022-12-12 22:22:23,094 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2019704433497537 [2022-12-12 22:22:23,094 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2022-12-12 22:22:23,095 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 61 transitions, 756 flow [2022-12-12 22:22:23,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 61 transitions, 756 flow [2022-12-12 22:22:23,096 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 61 transitions, 756 flow [2022-12-12 22:22:23,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:23,097 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:23,097 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:23,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 22:22:23,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:23,302 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:23,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1299381550, now seen corresponding path program 2 times [2022-12-12 22:22:23,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:23,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087009241] [2022-12-12 22:22:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:23,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:23,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:23,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087009241] [2022-12-12 22:22:23,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087009241] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:22:23,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:22:23,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 22:22:23,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906396581] [2022-12-12 22:22:23,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:22:23,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 22:22:23,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:23,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 22:22:23,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 22:22:23,460 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 29 [2022-12-12 22:22:23,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 61 transitions, 756 flow. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:23,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:23,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 29 [2022-12-12 22:22:23,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:23,573 INFO L130 PetriNetUnfolder]: 264/465 cut-off events. [2022-12-12 22:22:23,574 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-12-12 22:22:23,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3308 conditions, 465 events. 264/465 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1654 event pairs, 87 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 2951. Up to 464 conditions per place. [2022-12-12 22:22:23,576 INFO L137 encePairwiseOnDemand]: 25/29 looper letters, 78 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2022-12-12 22:22:23,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 83 transitions, 1189 flow [2022-12-12 22:22:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 22:22:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 22:22:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2022-12-12 22:22:23,579 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5057471264367817 [2022-12-12 22:22:23,581 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2022-12-12 22:22:23,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 83 transitions, 1189 flow [2022-12-12 22:22:23,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 83 transitions, 1189 flow [2022-12-12 22:22:23,584 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 83 transitions, 1189 flow [2022-12-12 22:22:23,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:23,584 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:23,585 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:23,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 22:22:23,585 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:23,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:23,585 INFO L85 PathProgramCache]: Analyzing trace with hash 418829075, now seen corresponding path program 1 times [2022-12-12 22:22:23,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:23,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693847367] [2022-12-12 22:22:23,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:23,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:23,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:23,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693847367] [2022-12-12 22:22:23,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693847367] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:22:23,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:22:23,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 22:22:23,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199967443] [2022-12-12 22:22:23,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:22:23,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 22:22:23,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 22:22:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 22:22:23,721 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 29 [2022-12-12 22:22:23,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 83 transitions, 1189 flow. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:23,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:23,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 29 [2022-12-12 22:22:23,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:23,873 INFO L130 PetriNetUnfolder]: 323/562 cut-off events. [2022-12-12 22:22:23,873 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-12-12 22:22:23,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4552 conditions, 562 events. 323/562 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2135 event pairs, 87 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 4080. Up to 561 conditions per place. [2022-12-12 22:22:23,877 INFO L137 encePairwiseOnDemand]: 26/29 looper letters, 107 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2022-12-12 22:22:23,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 112 transitions, 1825 flow [2022-12-12 22:22:23,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 22:22:23,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 22:22:23,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2022-12-12 22:22:23,878 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2022-12-12 22:22:23,880 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2022-12-12 22:22:23,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 112 transitions, 1825 flow [2022-12-12 22:22:23,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 112 transitions, 1825 flow [2022-12-12 22:22:23,883 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 112 transitions, 1825 flow [2022-12-12 22:22:23,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:23,884 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:23,884 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:23,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-12 22:22:23,884 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:23,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:23,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1151578731, now seen corresponding path program 1 times [2022-12-12 22:22:23,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:23,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124985242] [2022-12-12 22:22:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:23,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-12 22:22:24,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:24,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124985242] [2022-12-12 22:22:24,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124985242] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:22:24,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:22:24,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 22:22:24,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155992680] [2022-12-12 22:22:24,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:22:24,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 22:22:24,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:24,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 22:22:24,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 22:22:24,069 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 29 [2022-12-12 22:22:24,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 112 transitions, 1825 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:24,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:24,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 29 [2022-12-12 22:22:24,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:24,170 INFO L130 PetriNetUnfolder]: 257/448 cut-off events. [2022-12-12 22:22:24,170 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-12 22:22:24,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4083 conditions, 448 events. 257/448 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1402 event pairs, 36 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 3740. Up to 447 conditions per place. [2022-12-12 22:22:24,173 INFO L137 encePairwiseOnDemand]: 25/29 looper letters, 77 selfloop transitions, 2 changer transitions 6/85 dead transitions. [2022-12-12 22:22:24,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 85 transitions, 1554 flow [2022-12-12 22:22:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 22:22:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 22:22:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 38 transitions. [2022-12-12 22:22:24,174 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2022-12-12 22:22:24,175 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2022-12-12 22:22:24,175 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 85 transitions, 1554 flow [2022-12-12 22:22:24,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 79 transitions, 1443 flow [2022-12-12 22:22:24,178 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 79 transitions, 1443 flow [2022-12-12 22:22:24,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:24,178 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:24,178 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:24,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-12 22:22:24,178 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:24,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:24,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1718579395, now seen corresponding path program 1 times [2022-12-12 22:22:24,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:24,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851162078] [2022-12-12 22:22:24,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:24,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:26,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:26,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851162078] [2022-12-12 22:22:26,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851162078] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:26,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365086948] [2022-12-12 22:22:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:26,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:26,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:26,705 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:26,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 22:22:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:26,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 22:22:26,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:27,389 INFO L321 Elim1Store]: treesize reduction 20, result has 42.9 percent of original size [2022-12-12 22:22:27,390 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 53 treesize of output 43 [2022-12-12 22:22:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:27,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:22:35,533 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 77 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 22:22:45,745 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 78 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 22:23:04,042 WARN L233 SmtUtils]: Spent 18.16s on a formula simplification. DAG size of input: 49 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 22:23:16,403 WARN L233 SmtUtils]: Spent 12.17s on a formula simplification. DAG size of input: 54 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 22:23:17,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:23:17,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 146 treesize of output 728 Received shutdown request... [2022-12-12 22:36:35,410 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 22:36:35,414 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 22:36:35,416 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 22:36:35,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-12 22:36:35,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:36:35,611 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 34 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ATOM-1 context. [2022-12-12 22:36:35,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 22:36:35,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 22:36:35,613 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1] [2022-12-12 22:36:35,616 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 22:36:35,616 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 22:36:35,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 10:36:35 BasicIcfg [2022-12-12 22:36:35,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 22:36:35,618 INFO L158 Benchmark]: Toolchain (without parser) took 872458.74ms. Allocated memory was 166.7MB in the beginning and 540.0MB in the end (delta: 373.3MB). Free memory was 143.2MB in the beginning and 481.3MB in the end (delta: -338.1MB). Peak memory consumption was 357.2MB. Max. memory is 8.0GB. [2022-12-12 22:36:35,618 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 166.7MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 22:36:35,618 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.56ms. Allocated memory is still 166.7MB. Free memory was 142.8MB in the beginning and 129.5MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-12 22:36:35,618 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.23ms. Allocated memory is still 166.7MB. Free memory was 129.5MB in the beginning and 126.4MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-12-12 22:36:35,618 INFO L158 Benchmark]: Boogie Preprocessor took 44.65ms. Allocated memory is still 166.7MB. Free memory was 126.4MB in the beginning and 123.9MB in the end (delta: 2.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-12-12 22:36:35,619 INFO L158 Benchmark]: RCFGBuilder took 641.23ms. Allocated memory is still 166.7MB. Free memory was 123.9MB in the beginning and 92.4MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 8.0GB. [2022-12-12 22:36:35,619 INFO L158 Benchmark]: TraceAbstraction took 871450.58ms. Allocated memory was 166.7MB in the beginning and 540.0MB in the end (delta: 373.3MB). Free memory was 91.4MB in the beginning and 481.3MB in the end (delta: -389.9MB). Peak memory consumption was 304.8MB. Max. memory is 8.0GB. [2022-12-12 22:36:35,620 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 166.7MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 244.56ms. Allocated memory is still 166.7MB. Free memory was 142.8MB in the beginning and 129.5MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 55.23ms. Allocated memory is still 166.7MB. Free memory was 129.5MB in the beginning and 126.4MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.65ms. Allocated memory is still 166.7MB. Free memory was 126.4MB in the beginning and 123.9MB in the end (delta: 2.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 641.23ms. Allocated memory is still 166.7MB. Free memory was 123.9MB in the beginning and 92.4MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 8.0GB. * TraceAbstraction took 871450.58ms. Allocated memory was 166.7MB in the beginning and 540.0MB in the end (delta: 373.3MB). Free memory was 91.4MB in the beginning and 481.3MB in the end (delta: -389.9MB). Peak memory consumption was 304.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 14.5s, 415 PlacesBefore, 29 PlacesAfterwards, 457 TransitionsBefore, 29 TransitionsAfterwards, 52052 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 122 TrivialYvCompositions, 264 ConcurrentYvCompositions, 42 ChoiceCompositions, 428 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 36100, independent: 36049, independent conditional: 36049, independent unconditional: 0, dependent: 51, dependent conditional: 51, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 36100, independent: 36049, independent conditional: 0, independent unconditional: 36049, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 36100, independent: 36049, independent conditional: 0, independent unconditional: 36049, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 36100, independent: 36049, independent conditional: 0, independent unconditional: 36049, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 30546, independent: 30518, independent conditional: 0, independent unconditional: 30518, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 30546, independent: 30518, independent conditional: 0, independent unconditional: 30518, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 28, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 126, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 126, dependent conditional: 0, dependent unconditional: 126, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 36100, independent: 5531, independent conditional: 0, independent unconditional: 5531, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 30546, unknown conditional: 0, unknown unconditional: 30546] , Statistics on independence cache: Total cache size (in pairs): 68635, Positive cache size: 68607, Positive conditional cache size: 0, Positive unconditional cache size: 68607, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 128]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 34 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 123]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 34 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 122]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 34 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 691 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: 871.3s, OverallIterations: 9, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 14.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 68 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 54 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 667 IncrementalHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 54 mSolverCounterUnsat, 0 mSDtfsCounter, 667 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 144 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1825occurred in iteration=7, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 232 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 244 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 267 ConstructedInterpolants, 0 QuantifiedInterpolants, 1041 SizeOfPredicates, 46 NumberOfNonLiveVariables, 776 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 184/237 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