./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 22:50:49,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:50:49,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:50:49,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:50:49,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:50:49,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:50:49,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:50:49,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:50:49,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:50:49,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:50:49,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:50:49,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:50:49,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:50:49,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:50:49,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:50:49,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:50:49,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:50:49,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:50:49,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:50:49,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:50:49,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:50:49,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:50:49,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:50:49,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:50:49,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:50:49,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:50:49,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:50:49,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:50:49,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:50:49,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:50:49,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:50:49,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:50:49,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:50:49,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:50:49,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:50:49,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:50:49,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:50:49,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:50:49,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:50:49,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:50:49,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:50:49,228 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:50:49,261 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:50:49,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:50:49,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:50:49,263 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:50:49,263 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:50:49,264 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:50:49,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:50:49,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:50:49,265 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:50:49,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:50:49,266 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:50:49,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:50:49,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:50:49,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:50:49,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:50:49,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:50:49,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:50:49,267 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:50:49,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:50:49,268 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:50:49,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:50:49,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:50:49,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:50:49,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:50:49,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:50:49,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:50:49,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:50:49,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:50:49,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:50:49,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:50:49,270 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:50:49,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:50:49,271 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:50:49,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:50:49,271 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:50:49,271 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 22:50:49,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:50:49,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:50:49,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:50:49,613 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:50:49,613 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:50:49,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2023-08-30 22:50:50,900 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:50:51,169 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:50:51,169 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2023-08-30 22:50:51,192 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c95b40db/3a0902bdfa7d41b9bcd2a782a74d759f/FLAGea22eb5e6 [2023-08-30 22:50:51,206 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c95b40db/3a0902bdfa7d41b9bcd2a782a74d759f [2023-08-30 22:50:51,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:50:51,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:50:51,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:50:51,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:50:51,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:50:51,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:50:51" (1/1) ... [2023-08-30 22:50:51,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3678be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:51, skipping insertion in model container [2023-08-30 22:50:51,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:50:51" (1/1) ... [2023-08-30 22:50:51,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:50:51,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:50:51,530 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i[30963,30976] [2023-08-30 22:50:51,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:50:51,543 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:50:51,590 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i[30963,30976] [2023-08-30 22:50:51,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:50:51,627 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 22:50:51,627 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 22:50:51,633 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:50:51,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:51 WrapperNode [2023-08-30 22:50:51,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:50:51,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:50:51,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:50:51,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:50:51,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:51" (1/1) ... [2023-08-30 22:50:51,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:51" (1/1) ... [2023-08-30 22:50:51,684 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-08-30 22:50:51,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:50:51,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:50:51,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:50:51,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:50:51,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:51" (1/1) ... [2023-08-30 22:50:51,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:51" (1/1) ... [2023-08-30 22:50:51,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:51" (1/1) ... [2023-08-30 22:50:51,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:51" (1/1) ... [2023-08-30 22:50:51,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:51" (1/1) ... [2023-08-30 22:50:51,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:51" (1/1) ... [2023-08-30 22:50:51,723 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:51" (1/1) ... [2023-08-30 22:50:51,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:51" (1/1) ... [2023-08-30 22:50:51,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:50:51,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:50:51,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:50:51,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:50:51,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:51" (1/1) ... [2023-08-30 22:50:51,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:50:51,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:50:51,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 22:50:51,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 22:50:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 22:50:51,820 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 22:50:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 22:50:51,820 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 22:50:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:50:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 22:50:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:50:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:50:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:50:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:50:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 22:50:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:50:51,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:50:51,823 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 22:50:52,001 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:50:52,003 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:50:52,129 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:50:52,134 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:50:52,134 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 22:50:52,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:50:52 BoogieIcfgContainer [2023-08-30 22:50:52,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:50:52,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:50:52,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:50:52,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:50:52,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:50:51" (1/3) ... [2023-08-30 22:50:52,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e01fe7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:50:52, skipping insertion in model container [2023-08-30 22:50:52,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:51" (2/3) ... [2023-08-30 22:50:52,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e01fe7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:50:52, skipping insertion in model container [2023-08-30 22:50:52,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:50:52" (3/3) ... [2023-08-30 22:50:52,143 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2023-08-30 22:50:52,150 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:50:52,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:50:52,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 22:50:52,158 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:50:52,212 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:50:52,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2023-08-30 22:50:52,270 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-08-30 22:50:52,270 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:50:52,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-08-30 22:50:52,275 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2023-08-30 22:50:52,278 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2023-08-30 22:50:52,280 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:50:52,287 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 64 transitions, 134 flow [2023-08-30 22:50:52,290 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 64 transitions, 134 flow [2023-08-30 22:50:52,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 64 transitions, 134 flow [2023-08-30 22:50:52,309 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-08-30 22:50:52,309 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:50:52,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-08-30 22:50:52,311 INFO L119 LiptonReduction]: Number of co-enabled transitions 1078 [2023-08-30 22:50:54,121 INFO L134 LiptonReduction]: Checked pairs total: 999 [2023-08-30 22:50:54,121 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-30 22:50:54,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:50:54,150 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=true, 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;@4ac8727e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:50:54,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 22:50:54,157 INFO L130 PetriNetUnfolder]: 3/13 cut-off events. [2023-08-30 22:50:54,158 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:50:54,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:54,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 22:50:54,159 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:50:54,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:54,164 INFO L85 PathProgramCache]: Analyzing trace with hash -776471266, now seen corresponding path program 1 times [2023-08-30 22:50:54,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:54,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126821314] [2023-08-30 22:50:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:54,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:54,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:54,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126821314] [2023-08-30 22:50:54,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126821314] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:50:54,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:50:54,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:50:54,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027473728] [2023-08-30 22:50:54,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:50:54,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 22:50:54,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:54,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 22:50:54,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 22:50:54,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 124 [2023-08-30 22:50:54,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:54,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:54,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 124 [2023-08-30 22:50:54,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:54,721 INFO L130 PetriNetUnfolder]: 94/152 cut-off events. [2023-08-30 22:50:54,721 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:50:54,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 393 event pairs, 11 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2023-08-30 22:50:54,726 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2023-08-30 22:50:54,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2023-08-30 22:50:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 22:50:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 22:50:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 245 transitions. [2023-08-30 22:50:54,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4939516129032258 [2023-08-30 22:50:54,738 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 245 transitions. [2023-08-30 22:50:54,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 245 transitions. [2023-08-30 22:50:54,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:54,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 245 transitions. [2023-08-30 22:50:54,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:54,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:54,748 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:54,749 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 245 transitions. [2023-08-30 22:50:54,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2023-08-30 22:50:54,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 22:50:54,753 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2023-08-30 22:50:54,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-08-30 22:50:54,757 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-08-30 22:50:54,757 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2023-08-30 22:50:54,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:54,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:54,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:54,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:50:54,758 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:50:54,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:54,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1135033148, now seen corresponding path program 1 times [2023-08-30 22:50:54,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:54,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698567655] [2023-08-30 22:50:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:54,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:54,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:54,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698567655] [2023-08-30 22:50:54,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698567655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:50:54,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:50:54,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:50:54,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790338618] [2023-08-30 22:50:54,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:50:54,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:50:54,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:54,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:50:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:50:54,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:50:54,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:54,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:54,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:50:54,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:55,010 INFO L130 PetriNetUnfolder]: 126/217 cut-off events. [2023-08-30 22:50:55,010 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2023-08-30 22:50:55,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 654 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2023-08-30 22:50:55,014 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-08-30 22:50:55,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2023-08-30 22:50:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:50:55,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:50:55,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 356 transitions. [2023-08-30 22:50:55,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478494623655914 [2023-08-30 22:50:55,021 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 356 transitions. [2023-08-30 22:50:55,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 356 transitions. [2023-08-30 22:50:55,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:55,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 356 transitions. [2023-08-30 22:50:55,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.333333333333336) internal successors, (356), 6 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,028 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,028 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 356 transitions. [2023-08-30 22:50:55,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2023-08-30 22:50:55,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:50:55,033 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2023-08-30 22:50:55,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-08-30 22:50:55,034 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2023-08-30 22:50:55,034 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2023-08-30 22:50:55,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:55,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:55,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:50:55,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:50:55,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:55,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1135047098, now seen corresponding path program 2 times [2023-08-30 22:50:55,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:55,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512812277] [2023-08-30 22:50:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:55,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:55,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:55,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512812277] [2023-08-30 22:50:55,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512812277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:50:55,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:50:55,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:50:55,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156276991] [2023-08-30 22:50:55,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:50:55,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:50:55,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:55,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:50:55,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:50:55,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:50:55,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:55,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:50:55,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:55,294 INFO L130 PetriNetUnfolder]: 114/199 cut-off events. [2023-08-30 22:50:55,294 INFO L131 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2023-08-30 22:50:55,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 199 events. 114/199 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 630 event pairs, 19 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 636. Up to 84 conditions per place. [2023-08-30 22:50:55,296 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 29 selfloop transitions, 9 changer transitions 4/42 dead transitions. [2023-08-30 22:50:55,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 284 flow [2023-08-30 22:50:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 22:50:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 22:50:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 298 transitions. [2023-08-30 22:50:55,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806451612903226 [2023-08-30 22:50:55,302 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 298 transitions. [2023-08-30 22:50:55,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 298 transitions. [2023-08-30 22:50:55,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:55,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 298 transitions. [2023-08-30 22:50:55,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,305 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,305 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 5 states and 298 transitions. [2023-08-30 22:50:55,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 284 flow [2023-08-30 22:50:55,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 282 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 22:50:55,311 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 182 flow [2023-08-30 22:50:55,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-08-30 22:50:55,313 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 17 predicate places. [2023-08-30 22:50:55,316 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 182 flow [2023-08-30 22:50:55,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:55,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:55,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:50:55,318 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:50:55,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:55,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1601852847, now seen corresponding path program 1 times [2023-08-30 22:50:55,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:55,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797264301] [2023-08-30 22:50:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:55,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:55,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:55,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797264301] [2023-08-30 22:50:55,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797264301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:50:55,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:50:55,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 22:50:55,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922248335] [2023-08-30 22:50:55,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:50:55,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 22:50:55,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:55,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 22:50:55,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 22:50:55,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:50:55,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:55,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:50:55,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:55,606 INFO L130 PetriNetUnfolder]: 136/239 cut-off events. [2023-08-30 22:50:55,607 INFO L131 PetriNetUnfolder]: For 571/571 co-relation queries the response was YES. [2023-08-30 22:50:55,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 239 events. 136/239 cut-off events. For 571/571 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 797 event pairs, 31 based on Foata normal form. 4/243 useless extension candidates. Maximal degree in co-relation 842. Up to 101 conditions per place. [2023-08-30 22:50:55,608 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 30 selfloop transitions, 16 changer transitions 8/54 dead transitions. [2023-08-30 22:50:55,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 419 flow [2023-08-30 22:50:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 22:50:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 22:50:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 412 transitions. [2023-08-30 22:50:55,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47465437788018433 [2023-08-30 22:50:55,611 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 412 transitions. [2023-08-30 22:50:55,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 412 transitions. [2023-08-30 22:50:55,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:55,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 412 transitions. [2023-08-30 22:50:55,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.857142857142854) internal successors, (412), 7 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,633 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,633 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 182 flow. Second operand 7 states and 412 transitions. [2023-08-30 22:50:55,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 419 flow [2023-08-30 22:50:55,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 54 transitions, 379 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-30 22:50:55,640 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 269 flow [2023-08-30 22:50:55,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=269, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-08-30 22:50:55,642 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 22 predicate places. [2023-08-30 22:50:55,642 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 269 flow [2023-08-30 22:50:55,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:55,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:55,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 22:50:55,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:50:55,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:55,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1601722647, now seen corresponding path program 2 times [2023-08-30 22:50:55,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:55,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550338822] [2023-08-30 22:50:55,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:55,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:55,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:55,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550338822] [2023-08-30 22:50:55,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550338822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:50:55,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:50:55,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 22:50:55,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566693137] [2023-08-30 22:50:55,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:50:55,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 22:50:55,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:55,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 22:50:55,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 22:50:55,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:50:55,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 269 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:55,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:50:55,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:55,872 INFO L130 PetriNetUnfolder]: 172/303 cut-off events. [2023-08-30 22:50:55,872 INFO L131 PetriNetUnfolder]: For 787/787 co-relation queries the response was YES. [2023-08-30 22:50:55,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1151 conditions, 303 events. 172/303 cut-off events. For 787/787 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1053 event pairs, 22 based on Foata normal form. 8/311 useless extension candidates. Maximal degree in co-relation 1127. Up to 79 conditions per place. [2023-08-30 22:50:55,875 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 38 selfloop transitions, 22 changer transitions 3/63 dead transitions. [2023-08-30 22:50:55,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 519 flow [2023-08-30 22:50:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 22:50:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 22:50:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2023-08-30 22:50:55,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4737903225806452 [2023-08-30 22:50:55,878 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2023-08-30 22:50:55,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2023-08-30 22:50:55,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:55,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2023-08-30 22:50:55,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,882 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,882 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 269 flow. Second operand 8 states and 470 transitions. [2023-08-30 22:50:55,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 519 flow [2023-08-30 22:50:55,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 495 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 22:50:55,887 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 375 flow [2023-08-30 22:50:55,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=375, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-08-30 22:50:55,888 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 32 predicate places. [2023-08-30 22:50:55,888 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 375 flow [2023-08-30 22:50:55,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:55,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:55,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:55,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 22:50:55,889 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:50:55,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:55,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1572215607, now seen corresponding path program 3 times [2023-08-30 22:50:55,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:55,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794013798] [2023-08-30 22:50:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:55,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:55,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:55,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794013798] [2023-08-30 22:50:55,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794013798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:50:55,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:50:55,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 22:50:55,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120921501] [2023-08-30 22:50:55,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:50:55,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 22:50:55,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:55,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 22:50:55,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-30 22:50:56,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:50:56,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 375 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:56,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:56,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:50:56,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:56,142 INFO L130 PetriNetUnfolder]: 168/295 cut-off events. [2023-08-30 22:50:56,142 INFO L131 PetriNetUnfolder]: For 1394/1394 co-relation queries the response was YES. [2023-08-30 22:50:56,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1328 conditions, 295 events. 168/295 cut-off events. For 1394/1394 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1049 event pairs, 18 based on Foata normal form. 8/303 useless extension candidates. Maximal degree in co-relation 1299. Up to 71 conditions per place. [2023-08-30 22:50:56,145 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 28 selfloop transitions, 27 changer transitions 10/65 dead transitions. [2023-08-30 22:50:56,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 651 flow [2023-08-30 22:50:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 22:50:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 22:50:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 469 transitions. [2023-08-30 22:50:56,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727822580645161 [2023-08-30 22:50:56,147 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 469 transitions. [2023-08-30 22:50:56,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 469 transitions. [2023-08-30 22:50:56,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:56,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 469 transitions. [2023-08-30 22:50:56,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.625) internal successors, (469), 8 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:56,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:56,151 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:56,152 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 375 flow. Second operand 8 states and 469 transitions. [2023-08-30 22:50:56,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 651 flow [2023-08-30 22:50:56,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 617 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 22:50:56,159 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 476 flow [2023-08-30 22:50:56,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=476, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2023-08-30 22:50:56,165 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 39 predicate places. [2023-08-30 22:50:56,165 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 476 flow [2023-08-30 22:50:56,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:56,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:56,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:56,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 22:50:56,169 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:50:56,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:56,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1868187119, now seen corresponding path program 4 times [2023-08-30 22:50:56,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:56,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636854875] [2023-08-30 22:50:56,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:56,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:56,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:56,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636854875] [2023-08-30 22:50:56,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636854875] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:50:56,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733090410] [2023-08-30 22:50:56,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 22:50:56,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:50:56,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:50:56,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:50:56,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 22:50:56,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 22:50:56,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:50:56,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 22:50:56,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:50:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:56,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:50:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:56,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733090410] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:50:56,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:50:56,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 22:50:56,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649328794] [2023-08-30 22:50:56,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:50:56,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 22:50:56,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:56,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 22:50:56,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-30 22:50:56,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:50:56,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 43 transitions, 476 flow. Second operand has 12 states, 12 states have (on average 54.833333333333336) internal successors, (658), 12 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:56,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:56,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:50:56,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:56,861 INFO L130 PetriNetUnfolder]: 192/343 cut-off events. [2023-08-30 22:50:56,861 INFO L131 PetriNetUnfolder]: For 2705/2705 co-relation queries the response was YES. [2023-08-30 22:50:56,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1694 conditions, 343 events. 192/343 cut-off events. For 2705/2705 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1207 event pairs, 39 based on Foata normal form. 24/367 useless extension candidates. Maximal degree in co-relation 1662. Up to 181 conditions per place. [2023-08-30 22:50:56,864 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 45 selfloop transitions, 19 changer transitions 19/83 dead transitions. [2023-08-30 22:50:56,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 916 flow [2023-08-30 22:50:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 22:50:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 22:50:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 701 transitions. [2023-08-30 22:50:56,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47110215053763443 [2023-08-30 22:50:56,870 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 701 transitions. [2023-08-30 22:50:56,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 701 transitions. [2023-08-30 22:50:56,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:56,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 701 transitions. [2023-08-30 22:50:56,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.416666666666664) internal successors, (701), 12 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:56,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 124.0) internal successors, (1612), 13 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:56,877 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 124.0) internal successors, (1612), 13 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:56,877 INFO L175 Difference]: Start difference. First operand has 57 places, 43 transitions, 476 flow. Second operand 12 states and 701 transitions. [2023-08-30 22:50:56,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 916 flow [2023-08-30 22:50:56,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 83 transitions, 861 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-08-30 22:50:56,885 INFO L231 Difference]: Finished difference. Result has 69 places, 49 transitions, 586 flow [2023-08-30 22:50:56,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=586, PETRI_PLACES=69, PETRI_TRANSITIONS=49} [2023-08-30 22:50:56,886 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 51 predicate places. [2023-08-30 22:50:56,887 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 49 transitions, 586 flow [2023-08-30 22:50:56,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.833333333333336) internal successors, (658), 12 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:56,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:56,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:56,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 22:50:57,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:50:57,094 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:50:57,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:57,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1881593069, now seen corresponding path program 5 times [2023-08-30 22:50:57,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:57,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847018936] [2023-08-30 22:50:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:57,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:57,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:57,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847018936] [2023-08-30 22:50:57,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847018936] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:50:57,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465547179] [2023-08-30 22:50:57,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 22:50:57,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:50:57,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:50:57,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:50:57,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 22:50:57,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 22:50:57,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:50:57,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 22:50:57,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:50:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:57,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:50:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:57,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465547179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:50:57,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:50:57,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 22:50:57,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414755307] [2023-08-30 22:50:57,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:50:57,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 22:50:57,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:57,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 22:50:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-30 22:50:57,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:50:57,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 49 transitions, 586 flow. Second operand has 13 states, 13 states have (on average 54.92307692307692) internal successors, (714), 13 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:57,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:57,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:50:57,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:57,791 INFO L130 PetriNetUnfolder]: 254/459 cut-off events. [2023-08-30 22:50:57,791 INFO L131 PetriNetUnfolder]: For 6988/6988 co-relation queries the response was YES. [2023-08-30 22:50:57,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2615 conditions, 459 events. 254/459 cut-off events. For 6988/6988 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1795 event pairs, 28 based on Foata normal form. 28/487 useless extension candidates. Maximal degree in co-relation 2577. Up to 131 conditions per place. [2023-08-30 22:50:57,795 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 46 selfloop transitions, 44 changer transitions 29/119 dead transitions. [2023-08-30 22:50:57,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 119 transitions, 1453 flow [2023-08-30 22:50:57,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 22:50:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 22:50:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1051 transitions. [2023-08-30 22:50:57,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47087813620071683 [2023-08-30 22:50:57,799 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1051 transitions. [2023-08-30 22:50:57,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1051 transitions. [2023-08-30 22:50:57,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:57,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1051 transitions. [2023-08-30 22:50:57,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 58.388888888888886) internal successors, (1051), 18 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:57,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 124.0) internal successors, (2356), 19 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:57,807 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 124.0) internal successors, (2356), 19 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:57,807 INFO L175 Difference]: Start difference. First operand has 69 places, 49 transitions, 586 flow. Second operand 18 states and 1051 transitions. [2023-08-30 22:50:57,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 119 transitions, 1453 flow [2023-08-30 22:50:57,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 119 transitions, 1310 flow, removed 59 selfloop flow, removed 5 redundant places. [2023-08-30 22:50:57,820 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 944 flow [2023-08-30 22:50:57,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=944, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2023-08-30 22:50:57,821 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 73 predicate places. [2023-08-30 22:50:57,821 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 944 flow [2023-08-30 22:50:57,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.92307692307692) internal successors, (714), 13 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:57,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:57,822 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:57,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 22:50:58,027 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,SelfDestructingSolverStorable7 [2023-08-30 22:50:58,028 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:50:58,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1657155026, now seen corresponding path program 6 times [2023-08-30 22:50:58,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:58,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936596840] [2023-08-30 22:50:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:58,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:58,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:58,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936596840] [2023-08-30 22:50:58,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936596840] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:50:58,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120026230] [2023-08-30 22:50:58,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 22:50:58,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:50:58,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:50:58,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:50:58,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 22:50:58,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 22:50:58,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:50:58,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 22:50:58,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:50:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:58,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:50:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:58,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120026230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:50:58,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:50:58,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 22:50:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172609434] [2023-08-30 22:50:58,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:50:58,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 22:50:58,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:58,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 22:50:58,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-08-30 22:50:58,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:50:58,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 944 flow. Second operand has 14 states, 14 states have (on average 54.714285714285715) internal successors, (766), 14 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:58,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:58,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:50:58,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:58,697 INFO L130 PetriNetUnfolder]: 338/619 cut-off events. [2023-08-30 22:50:58,697 INFO L131 PetriNetUnfolder]: For 15431/15431 co-relation queries the response was YES. [2023-08-30 22:50:58,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4526 conditions, 619 events. 338/619 cut-off events. For 15431/15431 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2646 event pairs, 27 based on Foata normal form. 24/643 useless extension candidates. Maximal degree in co-relation 4478. Up to 207 conditions per place. [2023-08-30 22:50:58,704 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 56 selfloop transitions, 60 changer transitions 19/135 dead transitions. [2023-08-30 22:50:58,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 135 transitions, 2183 flow [2023-08-30 22:50:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 22:50:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 22:50:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1046 transitions. [2023-08-30 22:50:58,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46863799283154123 [2023-08-30 22:50:58,708 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1046 transitions. [2023-08-30 22:50:58,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1046 transitions. [2023-08-30 22:50:58,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:58,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1046 transitions. [2023-08-30 22:50:58,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 58.111111111111114) internal successors, (1046), 18 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:58,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 124.0) internal successors, (2356), 19 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:58,715 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 124.0) internal successors, (2356), 19 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:58,716 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 944 flow. Second operand 18 states and 1046 transitions. [2023-08-30 22:50:58,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 135 transitions, 2183 flow [2023-08-30 22:50:58,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 135 transitions, 1903 flow, removed 130 selfloop flow, removed 4 redundant places. [2023-08-30 22:50:58,762 INFO L231 Difference]: Finished difference. Result has 112 places, 82 transitions, 1311 flow [2023-08-30 22:50:58,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1311, PETRI_PLACES=112, PETRI_TRANSITIONS=82} [2023-08-30 22:50:58,763 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 94 predicate places. [2023-08-30 22:50:58,763 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 82 transitions, 1311 flow [2023-08-30 22:50:58,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.714285714285715) internal successors, (766), 14 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:58,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:58,764 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:58,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 22:50:58,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:50:58,970 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:50:58,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:58,970 INFO L85 PathProgramCache]: Analyzing trace with hash 929897188, now seen corresponding path program 7 times [2023-08-30 22:50:58,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:58,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883448730] [2023-08-30 22:50:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:58,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:59,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:59,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883448730] [2023-08-30 22:50:59,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883448730] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:50:59,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7985422] [2023-08-30 22:50:59,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 22:50:59,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:50:59,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:50:59,058 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:50:59,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 22:50:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:59,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 22:50:59,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:50:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:59,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:50:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:59,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7985422] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:50:59,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:50:59,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 22:50:59,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16047148] [2023-08-30 22:50:59,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:50:59,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 22:50:59,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:59,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 22:50:59,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-30 22:50:59,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:50:59,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 82 transitions, 1311 flow. Second operand has 15 states, 15 states have (on average 54.733333333333334) internal successors, (821), 15 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:59,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:59,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:50:59,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:59,768 INFO L130 PetriNetUnfolder]: 390/711 cut-off events. [2023-08-30 22:50:59,769 INFO L131 PetriNetUnfolder]: For 27776/27776 co-relation queries the response was YES. [2023-08-30 22:50:59,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5902 conditions, 711 events. 390/711 cut-off events. For 27776/27776 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3090 event pairs, 12 based on Foata normal form. 24/735 useless extension candidates. Maximal degree in co-relation 5847. Up to 238 conditions per place. [2023-08-30 22:50:59,777 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 45 selfloop transitions, 84 changer transitions 36/165 dead transitions. [2023-08-30 22:50:59,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 165 transitions, 2973 flow [2023-08-30 22:50:59,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 22:50:59,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 22:50:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1224 transitions. [2023-08-30 22:50:59,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700460829493088 [2023-08-30 22:50:59,782 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1224 transitions. [2023-08-30 22:50:59,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1224 transitions. [2023-08-30 22:50:59,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:59,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1224 transitions. [2023-08-30 22:50:59,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 58.285714285714285) internal successors, (1224), 21 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:59,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 124.0) internal successors, (2728), 22 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:59,790 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 124.0) internal successors, (2728), 22 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:59,790 INFO L175 Difference]: Start difference. First operand has 112 places, 82 transitions, 1311 flow. Second operand 21 states and 1224 transitions. [2023-08-30 22:50:59,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 165 transitions, 2973 flow [2023-08-30 22:50:59,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 165 transitions, 2401 flow, removed 246 selfloop flow, removed 12 redundant places. [2023-08-30 22:50:59,831 INFO L231 Difference]: Finished difference. Result has 130 places, 101 transitions, 1712 flow [2023-08-30 22:50:59,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1712, PETRI_PLACES=130, PETRI_TRANSITIONS=101} [2023-08-30 22:50:59,832 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 112 predicate places. [2023-08-30 22:50:59,832 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 101 transitions, 1712 flow [2023-08-30 22:50:59,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.733333333333334) internal successors, (821), 15 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:59,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:59,833 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:59,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 22:51:00,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:51:00,039 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:51:00,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:51:00,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1150765664, now seen corresponding path program 8 times [2023-08-30 22:51:00,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:51:00,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038541655] [2023-08-30 22:51:00,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:51:00,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:51:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:51:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:00,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:51:00,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038541655] [2023-08-30 22:51:00,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038541655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:51:00,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509573213] [2023-08-30 22:51:00,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 22:51:00,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:51:00,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:51:00,182 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:51:00,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 22:51:00,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 22:51:00,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:51:00,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 22:51:00,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:51:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:00,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:51:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:00,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509573213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:51:00,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:51:00,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-08-30 22:51:00,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849431552] [2023-08-30 22:51:00,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:51:00,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 22:51:00,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:51:00,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 22:51:00,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-08-30 22:51:00,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:51:00,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 101 transitions, 1712 flow. Second operand has 22 states, 22 states have (on average 54.5) internal successors, (1199), 22 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:00,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:51:00,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:51:00,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:51:01,282 INFO L130 PetriNetUnfolder]: 538/959 cut-off events. [2023-08-30 22:51:01,283 INFO L131 PetriNetUnfolder]: For 42829/42829 co-relation queries the response was YES. [2023-08-30 22:51:01,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8737 conditions, 959 events. 538/959 cut-off events. For 42829/42829 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4119 event pairs, 15 based on Foata normal form. 36/995 useless extension candidates. Maximal degree in co-relation 8675. Up to 330 conditions per place. [2023-08-30 22:51:01,293 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 60 selfloop transitions, 121 changer transitions 66/247 dead transitions. [2023-08-30 22:51:01,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 247 transitions, 4924 flow [2023-08-30 22:51:01,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 22:51:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 22:51:01,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2090 transitions. [2023-08-30 22:51:01,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681899641577061 [2023-08-30 22:51:01,299 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2090 transitions. [2023-08-30 22:51:01,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2090 transitions. [2023-08-30 22:51:01,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:51:01,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2090 transitions. [2023-08-30 22:51:01,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 58.05555555555556) internal successors, (2090), 36 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:01,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 124.0) internal successors, (4588), 37 states have internal predecessors, (4588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:01,315 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 124.0) internal successors, (4588), 37 states have internal predecessors, (4588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:01,315 INFO L175 Difference]: Start difference. First operand has 130 places, 101 transitions, 1712 flow. Second operand 36 states and 2090 transitions. [2023-08-30 22:51:01,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 247 transitions, 4924 flow [2023-08-30 22:51:01,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 247 transitions, 4317 flow, removed 265 selfloop flow, removed 14 redundant places. [2023-08-30 22:51:01,374 INFO L231 Difference]: Finished difference. Result has 169 places, 138 transitions, 2757 flow [2023-08-30 22:51:01,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2757, PETRI_PLACES=169, PETRI_TRANSITIONS=138} [2023-08-30 22:51:01,375 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 151 predicate places. [2023-08-30 22:51:01,375 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 138 transitions, 2757 flow [2023-08-30 22:51:01,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.5) internal successors, (1199), 22 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:01,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:51:01,376 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:51:01,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 22:51:01,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 22:51:01,582 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:51:01,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:51:01,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2052641735, now seen corresponding path program 9 times [2023-08-30 22:51:01,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:51:01,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343583964] [2023-08-30 22:51:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:51:01,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:51:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:51:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:01,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:51:01,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343583964] [2023-08-30 22:51:01,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343583964] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:51:01,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484844285] [2023-08-30 22:51:01,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 22:51:01,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:51:01,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:51:01,879 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:51:01,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 22:51:01,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-30 22:51:01,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:51:01,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 22:51:01,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:51:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:02,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:51:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:02,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484844285] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:51:02,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:51:02,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2023-08-30 22:51:02,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196300356] [2023-08-30 22:51:02,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:51:02,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 22:51:02,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:51:02,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 22:51:02,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 22:51:02,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:51:02,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 138 transitions, 2757 flow. Second operand has 34 states, 34 states have (on average 54.3235294117647) internal successors, (1847), 34 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:02,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:51:02,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:51:02,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:51:03,343 INFO L130 PetriNetUnfolder]: 674/1231 cut-off events. [2023-08-30 22:51:03,344 INFO L131 PetriNetUnfolder]: For 90353/90353 co-relation queries the response was YES. [2023-08-30 22:51:03,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13996 conditions, 1231 events. 674/1231 cut-off events. For 90353/90353 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 5569 event pairs, 99 based on Foata normal form. 24/1255 useless extension candidates. Maximal degree in co-relation 13921. Up to 466 conditions per place. [2023-08-30 22:51:03,361 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 113 selfloop transitions, 100 changer transitions 71/284 dead transitions. [2023-08-30 22:51:03,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 284 transitions, 6988 flow [2023-08-30 22:51:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 22:51:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 22:51:03,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2185 transitions. [2023-08-30 22:51:03,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637096774193548 [2023-08-30 22:51:03,365 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2185 transitions. [2023-08-30 22:51:03,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2185 transitions. [2023-08-30 22:51:03,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:51:03,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2185 transitions. [2023-08-30 22:51:03,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 57.5) internal successors, (2185), 38 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:03,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 124.0) internal successors, (4836), 39 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:03,378 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 124.0) internal successors, (4836), 39 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:03,378 INFO L175 Difference]: Start difference. First operand has 169 places, 138 transitions, 2757 flow. Second operand 38 states and 2185 transitions. [2023-08-30 22:51:03,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 284 transitions, 6988 flow [2023-08-30 22:51:03,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 284 transitions, 5397 flow, removed 763 selfloop flow, removed 13 redundant places. [2023-08-30 22:51:03,613 INFO L231 Difference]: Finished difference. Result has 201 places, 172 transitions, 3027 flow [2023-08-30 22:51:03,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3027, PETRI_PLACES=201, PETRI_TRANSITIONS=172} [2023-08-30 22:51:03,614 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 183 predicate places. [2023-08-30 22:51:03,615 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 172 transitions, 3027 flow [2023-08-30 22:51:03,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 54.3235294117647) internal successors, (1847), 34 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:03,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:51:03,616 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:51:03,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 22:51:03,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:51:03,822 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:51:03,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:51:03,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1571369213, now seen corresponding path program 10 times [2023-08-30 22:51:03,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:51:03,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006658954] [2023-08-30 22:51:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:51:03,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:51:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:51:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:04,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:51:04,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006658954] [2023-08-30 22:51:04,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006658954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:51:04,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277978789] [2023-08-30 22:51:04,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 22:51:04,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:51:04,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:51:04,071 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:51:04,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 22:51:04,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 22:51:04,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:51:04,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 22:51:04,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:51:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:04,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:51:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:04,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277978789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:51:04,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:51:04,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-08-30 22:51:04,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899942086] [2023-08-30 22:51:04,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:51:04,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 22:51:04,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:51:04,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 22:51:04,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 22:51:04,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:51:04,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 172 transitions, 3027 flow. Second operand has 35 states, 35 states have (on average 54.34285714285714) internal successors, (1902), 35 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:04,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:51:04,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:51:04,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:51:05,902 INFO L130 PetriNetUnfolder]: 858/1595 cut-off events. [2023-08-30 22:51:05,903 INFO L131 PetriNetUnfolder]: For 147518/147518 co-relation queries the response was YES. [2023-08-30 22:51:05,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17908 conditions, 1595 events. 858/1595 cut-off events. For 147518/147518 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7851 event pairs, 44 based on Foata normal form. 32/1627 useless extension candidates. Maximal degree in co-relation 17829. Up to 646 conditions per place. [2023-08-30 22:51:05,926 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 88 selfloop transitions, 180 changer transitions 83/351 dead transitions. [2023-08-30 22:51:05,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 351 transitions, 7742 flow [2023-08-30 22:51:05,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 22:51:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 22:51:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2538 transitions. [2023-08-30 22:51:05,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46517595307917886 [2023-08-30 22:51:05,984 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2538 transitions. [2023-08-30 22:51:05,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2538 transitions. [2023-08-30 22:51:05,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:51:05,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2538 transitions. [2023-08-30 22:51:05,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.68181818181818) internal successors, (2538), 44 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:05,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 124.0) internal successors, (5580), 45 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:05,997 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 124.0) internal successors, (5580), 45 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:05,997 INFO L175 Difference]: Start difference. First operand has 201 places, 172 transitions, 3027 flow. Second operand 44 states and 2538 transitions. [2023-08-30 22:51:05,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 351 transitions, 7742 flow [2023-08-30 22:51:06,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 351 transitions, 7093 flow, removed 257 selfloop flow, removed 17 redundant places. [2023-08-30 22:51:06,291 INFO L231 Difference]: Finished difference. Result has 238 places, 221 transitions, 4322 flow [2023-08-30 22:51:06,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4322, PETRI_PLACES=238, PETRI_TRANSITIONS=221} [2023-08-30 22:51:06,292 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 220 predicate places. [2023-08-30 22:51:06,292 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 221 transitions, 4322 flow [2023-08-30 22:51:06,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.34285714285714) internal successors, (1902), 35 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:06,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:51:06,300 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:51:06,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 22:51:06,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:51:06,512 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:51:06,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:51:06,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1553415691, now seen corresponding path program 11 times [2023-08-30 22:51:06,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:51:06,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088471925] [2023-08-30 22:51:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:51:06,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:51:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:51:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:06,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:51:06,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088471925] [2023-08-30 22:51:06,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088471925] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:51:06,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754892516] [2023-08-30 22:51:06,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 22:51:06,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:51:06,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:51:06,753 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:51:06,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 22:51:06,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-08-30 22:51:06,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:51:06,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 22:51:06,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:51:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:06,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:51:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:07,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754892516] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:51:07,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:51:07,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2023-08-30 22:51:07,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780968049] [2023-08-30 22:51:07,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:51:07,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 22:51:07,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:51:07,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 22:51:07,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 22:51:07,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:51:07,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 221 transitions, 4322 flow. Second operand has 34 states, 34 states have (on average 54.3235294117647) internal successors, (1847), 34 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:07,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:51:07,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:51:07,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:51:08,403 INFO L130 PetriNetUnfolder]: 1022/1891 cut-off events. [2023-08-30 22:51:08,404 INFO L131 PetriNetUnfolder]: For 245129/245129 co-relation queries the response was YES. [2023-08-30 22:51:08,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24168 conditions, 1891 events. 1022/1891 cut-off events. For 245129/245129 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 9476 event pairs, 16 based on Foata normal form. 32/1923 useless extension candidates. Maximal degree in co-relation 24077. Up to 778 conditions per place. [2023-08-30 22:51:08,451 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 81 selfloop transitions, 233 changer transitions 67/381 dead transitions. [2023-08-30 22:51:08,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 381 transitions, 9460 flow [2023-08-30 22:51:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 22:51:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 22:51:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2427 transitions. [2023-08-30 22:51:08,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46601382488479265 [2023-08-30 22:51:08,463 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2427 transitions. [2023-08-30 22:51:08,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2427 transitions. [2023-08-30 22:51:08,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:51:08,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2427 transitions. [2023-08-30 22:51:08,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 57.785714285714285) internal successors, (2427), 42 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:08,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 124.0) internal successors, (5332), 43 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:08,481 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 124.0) internal successors, (5332), 43 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:08,481 INFO L175 Difference]: Start difference. First operand has 238 places, 221 transitions, 4322 flow. Second operand 42 states and 2427 transitions. [2023-08-30 22:51:08,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 381 transitions, 9460 flow [2023-08-30 22:51:08,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 381 transitions, 8550 flow, removed 365 selfloop flow, removed 18 redundant places. [2023-08-30 22:51:08,855 INFO L231 Difference]: Finished difference. Result has 275 places, 258 transitions, 5412 flow [2023-08-30 22:51:08,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=5412, PETRI_PLACES=275, PETRI_TRANSITIONS=258} [2023-08-30 22:51:08,856 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 257 predicate places. [2023-08-30 22:51:08,856 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 258 transitions, 5412 flow [2023-08-30 22:51:08,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 54.3235294117647) internal successors, (1847), 34 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:08,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:51:08,857 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:51:08,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 22:51:09,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 22:51:09,063 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:51:09,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:51:09,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1171636794, now seen corresponding path program 12 times [2023-08-30 22:51:09,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:51:09,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460479107] [2023-08-30 22:51:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:51:09,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:51:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:51:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:09,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:51:09,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460479107] [2023-08-30 22:51:09,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460479107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:51:09,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740051009] [2023-08-30 22:51:09,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 22:51:09,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:51:09,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:51:09,349 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:51:09,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 22:51:09,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-08-30 22:51:09,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:51:09,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 22:51:09,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:51:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:09,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:51:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:09,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740051009] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:51:09,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:51:09,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2023-08-30 22:51:09,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192719350] [2023-08-30 22:51:09,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:51:09,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 22:51:09,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:51:09,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 22:51:09,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2023-08-30 22:51:09,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:51:09,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 258 transitions, 5412 flow. Second operand has 38 states, 38 states have (on average 54.28947368421053) internal successors, (2063), 38 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:09,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:51:09,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:51:09,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:51:11,141 INFO L130 PetriNetUnfolder]: 1034/1911 cut-off events. [2023-08-30 22:51:11,142 INFO L131 PetriNetUnfolder]: For 341708/341708 co-relation queries the response was YES. [2023-08-30 22:51:11,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26921 conditions, 1911 events. 1034/1911 cut-off events. For 341708/341708 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 9630 event pairs, 20 based on Foata normal form. 20/1931 useless extension candidates. Maximal degree in co-relation 26815. Up to 774 conditions per place. [2023-08-30 22:51:11,177 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 68 selfloop transitions, 243 changer transitions 74/385 dead transitions. [2023-08-30 22:51:11,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 385 transitions, 10213 flow [2023-08-30 22:51:11,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 22:51:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 22:51:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2311 transitions. [2023-08-30 22:51:11,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659274193548387 [2023-08-30 22:51:11,182 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2311 transitions. [2023-08-30 22:51:11,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2311 transitions. [2023-08-30 22:51:11,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:51:11,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2311 transitions. [2023-08-30 22:51:11,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.775) internal successors, (2311), 40 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:11,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 124.0) internal successors, (5084), 41 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:11,192 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 124.0) internal successors, (5084), 41 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:11,193 INFO L175 Difference]: Start difference. First operand has 275 places, 258 transitions, 5412 flow. Second operand 40 states and 2311 transitions. [2023-08-30 22:51:11,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 385 transitions, 10213 flow [2023-08-30 22:51:11,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 385 transitions, 8925 flow, removed 532 selfloop flow, removed 20 redundant places. [2023-08-30 22:51:11,743 INFO L231 Difference]: Finished difference. Result has 301 places, 267 transitions, 5360 flow [2023-08-30 22:51:11,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=4214, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=5360, PETRI_PLACES=301, PETRI_TRANSITIONS=267} [2023-08-30 22:51:11,743 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 283 predicate places. [2023-08-30 22:51:11,744 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 267 transitions, 5360 flow [2023-08-30 22:51:11,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 54.28947368421053) internal successors, (2063), 38 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:11,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:51:11,744 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:51:11,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 22:51:11,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 22:51:11,945 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:51:11,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:51:11,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1027063943, now seen corresponding path program 13 times [2023-08-30 22:51:11,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:51:11,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897168269] [2023-08-30 22:51:11,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:51:11,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:51:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:51:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:12,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:51:12,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897168269] [2023-08-30 22:51:12,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897168269] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:51:12,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46794086] [2023-08-30 22:51:12,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 22:51:12,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:51:12,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:51:12,265 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:51:12,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 22:51:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:51:12,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 22:51:12,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:51:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:12,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:51:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:51:12,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46794086] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:51:12,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:51:12,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 26 [2023-08-30 22:51:12,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302656052] [2023-08-30 22:51:12,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:51:12,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 22:51:12,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:51:12,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 22:51:12,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2023-08-30 22:51:12,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 22:51:12,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 267 transitions, 5360 flow. Second operand has 28 states, 28 states have (on average 54.42857142857143) internal successors, (1524), 28 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:12,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:51:12,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 22:51:12,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:51:14,113 INFO L130 PetriNetUnfolder]: 1134/2087 cut-off events. [2023-08-30 22:51:14,113 INFO L131 PetriNetUnfolder]: For 405135/405135 co-relation queries the response was YES. [2023-08-30 22:51:14,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30427 conditions, 2087 events. 1134/2087 cut-off events. For 405135/405135 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 10528 event pairs, 15 based on Foata normal form. 20/2107 useless extension candidates. Maximal degree in co-relation 30315. Up to 834 conditions per place. [2023-08-30 22:51:14,148 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 80 selfloop transitions, 270 changer transitions 90/440 dead transitions. [2023-08-30 22:51:14,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 440 transitions, 11869 flow [2023-08-30 22:51:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 22:51:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 22:51:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2776 transitions. [2023-08-30 22:51:14,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46639784946236557 [2023-08-30 22:51:14,153 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2776 transitions. [2023-08-30 22:51:14,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2776 transitions. [2023-08-30 22:51:14,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:51:14,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2776 transitions. [2023-08-30 22:51:14,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 57.833333333333336) internal successors, (2776), 48 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:14,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 124.0) internal successors, (6076), 49 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:14,167 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 124.0) internal successors, (6076), 49 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:14,167 INFO L175 Difference]: Start difference. First operand has 301 places, 267 transitions, 5360 flow. Second operand 48 states and 2776 transitions. [2023-08-30 22:51:14,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 440 transitions, 11869 flow [2023-08-30 22:51:14,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 440 transitions, 10278 flow, removed 582 selfloop flow, removed 33 redundant places. [2023-08-30 22:51:14,930 INFO L231 Difference]: Finished difference. Result has 325 places, 292 transitions, 6204 flow [2023-08-30 22:51:14,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=4445, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=6204, PETRI_PLACES=325, PETRI_TRANSITIONS=292} [2023-08-30 22:51:14,931 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 307 predicate places. [2023-08-30 22:51:14,931 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 292 transitions, 6204 flow [2023-08-30 22:51:14,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 54.42857142857143) internal successors, (1524), 28 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:14,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:51:14,932 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:51:14,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 22:51:15,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 22:51:15,133 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:51:15,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:51:15,133 INFO L85 PathProgramCache]: Analyzing trace with hash -697905322, now seen corresponding path program 14 times [2023-08-30 22:51:15,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:51:15,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736446414] [2023-08-30 22:51:15,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:51:15,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:51:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:51:15,149 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:51:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:51:15,207 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:51:15,208 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:51:15,209 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 22:51:15,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-30 22:51:15,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-30 22:51:15,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 22:51:15,212 INFO L445 BasicCegarLoop]: Path program histogram: [14, 2, 1] [2023-08-30 22:51:15,216 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 22:51:15,216 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 22:51:15,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 10:51:15 BasicIcfg [2023-08-30 22:51:15,284 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 22:51:15,285 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 22:51:15,285 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 22:51:15,285 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 22:51:15,285 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:50:52" (3/4) ... [2023-08-30 22:51:15,287 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-08-30 22:51:15,353 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 22:51:15,353 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 22:51:15,354 INFO L158 Benchmark]: Toolchain (without parser) took 24144.95ms. Allocated memory was 86.0MB in the beginning and 583.0MB in the end (delta: 497.0MB). Free memory was 62.0MB in the beginning and 178.0MB in the end (delta: -116.0MB). Peak memory consumption was 382.5MB. Max. memory is 16.1GB. [2023-08-30 22:51:15,354 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 58.7MB. Free memory is still 35.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 22:51:15,355 INFO L158 Benchmark]: CACSL2BoogieTranslator took 423.33ms. Allocated memory is still 86.0MB. Free memory was 61.7MB in the beginning and 42.6MB in the end (delta: 19.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-08-30 22:51:15,355 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.56ms. Allocated memory is still 86.0MB. Free memory was 42.6MB in the beginning and 40.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 22:51:15,355 INFO L158 Benchmark]: Boogie Preprocessor took 68.21ms. Allocated memory is still 86.0MB. Free memory was 40.6MB in the beginning and 65.0MB in the end (delta: -24.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 22:51:15,355 INFO L158 Benchmark]: RCFGBuilder took 381.08ms. Allocated memory is still 86.0MB. Free memory was 65.0MB in the beginning and 52.4MB in the end (delta: 12.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 22:51:15,356 INFO L158 Benchmark]: TraceAbstraction took 23146.14ms. Allocated memory was 86.0MB in the beginning and 583.0MB in the end (delta: 497.0MB). Free memory was 52.0MB in the beginning and 185.3MB in the end (delta: -133.3MB). Peak memory consumption was 366.4MB. Max. memory is 16.1GB. [2023-08-30 22:51:15,356 INFO L158 Benchmark]: Witness Printer took 69.00ms. Allocated memory is still 583.0MB. Free memory was 185.3MB in the beginning and 178.0MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-08-30 22:51:15,357 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 58.7MB. Free memory is still 35.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 423.33ms. Allocated memory is still 86.0MB. Free memory was 61.7MB in the beginning and 42.6MB in the end (delta: 19.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.56ms. Allocated memory is still 86.0MB. Free memory was 42.6MB in the beginning and 40.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.21ms. Allocated memory is still 86.0MB. Free memory was 40.6MB in the beginning and 65.0MB in the end (delta: -24.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 381.08ms. Allocated memory is still 86.0MB. Free memory was 65.0MB in the beginning and 52.4MB in the end (delta: 12.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 23146.14ms. Allocated memory was 86.0MB in the beginning and 583.0MB in the end (delta: 497.0MB). Free memory was 52.0MB in the beginning and 185.3MB in the end (delta: -133.3MB). Peak memory consumption was 366.4MB. Max. memory is 16.1GB. * Witness Printer took 69.00ms. Allocated memory is still 583.0MB. Free memory was 185.3MB in the beginning and 178.0MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 66 PlacesBefore, 18 PlacesAfterwards, 64 TransitionsBefore, 14 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 58 TotalNumberOfCompositions, 999 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 856, independent: 829, independent conditional: 0, independent unconditional: 829, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 590, independent: 578, independent conditional: 0, independent unconditional: 578, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 856, independent: 251, independent conditional: 0, independent unconditional: 251, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 590, unknown conditional: 0, unknown unconditional: 590] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 10, Positive conditional cache size: 0, Positive unconditional cache size: 10, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L716] 0 int condI = i >= (2*10 +6); VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=6, k=0, k=1] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L719] 0 int condJ = j >= (2*10 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=10, k=10] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 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: 23.0s, OverallIterations: 17, TraceHistogramMax: 10, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 12.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4612 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4510 mSDsluCounter, 785 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 778 mSDsCounter, 456 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4723 IncrementalHoareTripleChecker+Invalid, 5179 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 456 mSolverCounterUnsat, 7 mSDtfsCounter, 4723 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 762 GetRequests, 215 SyntacticMatches, 14 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8624 ImplicationChecksByTransitivity, 5.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6204occurred in iteration=16, InterpolantAutomatonStates: 355, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 436 NumberOfCodeBlocks, 436 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 2322 SizeOfPredicates, 98 NumberOfNonLiveVariables, 1590 ConjunctsInSsa, 160 ConjunctsInUnsatCore, 36 InterpolantComputations, 6 PerfectInterpolantSequences, 0/816 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 proved your program to be incorrect! [2023-08-30 22:51:15,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE